I have to ask, when was the last time you ever actually had complete un pluggable blowout? This seems like an awful amount of work for something with a 1% chance of happening.

HOWEVER

I commend you for finding a solution for people who need one.

 

Unfortunately I have had a good number of flats on other vehicles. Some not repairable.

I am a believer in plugs and have plugged many myself. The plugs have lasted the life of the tire.

I did purchase a modern spare kit for my I5. I am fully aware that many new vehicles do not have spares but because of my experience I did not feel fully comfortable without

If you do get a puncture ok, use the mobility kit and use the sealant. Hopefully it seals to get you somewhere to get it fixed or plug it yourself. if the tire is pluggable, odds are you are going to need to get it off the car to plug it. (Are you carrying a jack and lug wrench)

I got my spare for a recent long distance trip with a schedule of reservations. Could not afford to try to repair roadside, hope the mobility kit works or wait for a tow. If I got a flat I rather slap on a spare on get on my way to where I can access the tire and possibly repair it.

Yes we have road side assistance but that may take hours. All they are going to do is tow you to a dealer/tire shop that might or might not be available to repair or replace the tire (from other posts many dealers and some shops will not repair the tire)

 

The last time was maybe 6 years ago on my way to work. Went up an onramp, PSHHHHFuddafuddafudda....

A nail had pierced the sidewall. Cost me half a day to get it back home to pick up the other car and get to work, not including any repair. As an added bonus, the tow driver was sloppy with his tie-down hooks, stuck the point of one in a hole in one of the unibody stiffeners, and by the time he unloaded it the hook had opened the stiffener like a zipper.

And this was in the bustling suburbs. Not the kind of thing I want to encounter in Moose Fart, Minnesota or Windblown, Wyoming en route to a vacation destination. If that sounds like a stretch, I have family in Montana, friends in Minnesota and family and friends near the U.P. in Michigan.

Years before that I put a new set of tires on a car and found they were extremely vulnerable to sidewall cuts. Lost two of them that way.

Also, to your very insightful point, these were unpluggable. I think the little compressor they give you can be handy, but the whole goo-in-the-tire scheme is lame at best. It frequently doesn't seal, and essentially destroys the tire - no one wants to repair one that's had that stuff in it. So I keep the compressor and carry plugs, cement and an insertion tool. Used right they are more reliable - and durable - than the "proper" method of removing the tire to install an interior patch. If anyone wants to try this, get an old tire and do some practice runs and know what a good plug repair looks like. You don't want to learn - and make mistakes - on the side of the road.

Some have suggested simply carrying a full-size spare and putting luggage in the back seat, but there are many vacation spots where thieves hang out near tourist parking lots looking for easy pickin's.

Oh and BTW, @Theblackstig has my undying gratitude for the allocation sheet he posted and regularly updates. It was instrumental in finding the Limited RWD unicorn I wanted.

 

The last time was maybe 6 years ago on my way to work. Went up an onramp, PSHHHHFuddafuddafudda....

Also, to your very insightful point, these were unpluggable. I think the little compressor they give you can be handy, but the whole goo-in-the-tire scheme is lame at best. It frequently doesn't seal, and essentially destroys the tire - no one wants to repair one that's had that stuff in it. So I keep the compressor and carry plugs, cement and an insertion tool. Used right they are more reliable - and durable - than the "proper" method of removing the tire to install an interior patch. If anyone wants to try this, get an old tire and do some practice runs and know what a good plug repair looks like. You don't want to learn - and make mistakes - on the side of the road.

Some have suggested simply carrying a full-size spare and putting luggage in the back seat, but there are many vacation spots where thieves hang out near tourist parking lots looking for easy pickin's.

Oh and BTW, @Theblackstig has my undying gratitude for the allocation sheet he posted and regularly updates. It was instrumental in finding the Limited RWD unicorn I wanted.

Yeah I have never had a blow out, and I think in this day in age with tpms monitoring it should be a very rare event assuming you don't blast into a rock/curb/pothole. I've replaced more tire plugs due to age then I have used lol.

 

We CAN travel with luggage AND a spare, without having any of it on display in the passenger compartment!

Where is the tire stored? Does it fit below the trunk floor? Is it in that bag and rolling around in the Trunk? Can you post a picture of it stored away?

 

It's in the silver/black bag. (The bag turned out to be much bigger than needed.) There is no 'rolling around', not even sliding. The bigger suitcase completely covers it. Note that that suitcase just fits above the spare and under the roof of the trunk. A wider spare tire will cut down on the size of suitcase that will fit.

 

The Ioniq 6 OEM wheel diameter is 27.7”, this spare donut kit is 27.7”

Amazon.com: Complete Compact Spare Tire Kit w/Carrying Case - Fits 2020-2023 Tesla Model Y - Modern Spare : Automotive

Buy Complete Compact Spare Tire Kit w/Carrying Case - Fits 2020-2023 Tesla Model Y - Modern Spare: Spare Tire Carriers - Amazon.com ✓ FREE DELIVERY possible on eligible purchases

a.co

Not cheap but it comes with the same bolt pattern 5 x 114.3.

 

That's from Modern Spare. they have a kit for the 5, but not the 6. Before trying to use a kit not specifically for the 6, I'd want to know that the offset of the wheel is suitable (no interference with the brakes, etc.) and if the center bore is correct (Hyundai uses 67.1 mm I believe).

Also, the 145 width will reduce the vertical space for luggage, which is pretty tight even with the 135 I used.

And don't go by calculated circumference. What matters is actual measured revs per mile, which can vary between tires of the same nominal size, and also air pressure has an effect - especially when one tire in the comparison is at under 40 psi and the compact spare is at 60. Unfortunately I have found errors in the revs per mile specs (which are taken at recommended pressure) more than once.

I do know the spare I got causes no functional issues due to diameter.

 

The specs appear to exactly match the one they have for the Ioniq 6 (HYIO62227P): Fits All 2022-2023 Hyundai Ioniq 6 Models- Spare Tire And Complete Accessory Kit Options

 

Good for Modern Spare for getting an Ioniq 6 solution together. (It wasn't available when I started on this.)

They seem to lean more on nominal diameter than revs/mile in their tire sizing. The Continental T145/85r18 they use does not have a revs/mile figure that I could find. I also can't find one for the Hankook s300 on my nominally smaller 135/80r18, but I found such a rating on a Kumho T121 in the same size, and it came in at 754 revs/mile, almost exactly the same as the original tires. But as I've mentioned before, I've seen errors in revs/mile figures. (Also, my Hankook 135/80 has the same 81 mph "M" speed rating as the 145/85 Continental Modern Spare uses, though all auto manufacturers say to keep speeds below 50 mph regardless.)

The 145/85 tire that Modern Spare uses will slightly reduce trunk space. Around 1/4" vertically, not sure laterally. 1/4" doesn't seem like much, but it could easily mean having to use a smaller suitcase in my car. It's that tight a fit back there. And Modern Spare doesn't have the slick styrofoam insert that packages the jack and tools so nicely within the wheel, which is another space savings.

Their stuff is high quality, but with shipping it comes out to ~$90 more than my setup. Considering the jack adapter I had to fabricate, that makes it pretty much a wash for many people who'd rather skip that effort.

 

I did confirm with Modern Spare that the Tesla spare is the same tire for the Ioniq kit. The only difference is the jacks. I’m less worried about revs because in my mind this is not meant for a long drive just long enough to get the proper tire fixed or replaced. As long as it doesn’t rub, clears the breaks and is relatively close to the diameter of the other tires that works for me. Even a little shorter than OEM works because as the other tires wear they will not be as tall. The CB is 72.6mm so it will easily fit the Hyundai 67.1mm.

 

To summarize the data in the above Spare Tire discussion... I use Rim & Tire Size Calculator. Custom Offsets to get raw data on the various tire sizes.

The two stock tires for the Ioniq 6 are:
The SE 225/55R18: ------------- Diameter 27.7", Width 8.9", Sidewall Height 4.9", Circumference 87.1", Revolutions per Mile 727
The SEL/Limited 245/40R20: -- Diameter 27.7", Width 9.6", Sidewall Height 3.9", Circumference 87.0", Revolutions per Mile 728

The Genesis G70 compact spare with a T135/80R18 tire is 761 Revolutions per Mile; your speedometer will read about 5% less.
The Modern Spare with a T145/85R18 tire is 728 Revolutions per Mile.

 

Thanks. I've bought the Modern Spare, but not received it yet. Modern Spare's website says they match the 20" Ioniq 6 wheel by the tire selection. You did the math. Much appreciated.

 

You calculated those revs/mile figures, didn't you? That's not how it works. The weight of the car compresses the tire and reduces the actual rolling radius. Tire construction, air pressure and speed all influence the actual revs/mile. The whole point of the figure is that it is a measure of the real, not calculated, rolling circumference.

If you look up the revs/mile for a variety of tires in the two sizes used on the 6, the ones that list a figure are almost exactly 750. Both sizes. Which makes sense, since compression of the tire slightly reduces the rolling radius, which would increase the rev/mile figure over what a calculation would suggest.

If you need a close match, base it on published revs/mile figures, not calculated from tire sizes - too much variability.

 

OK, my spare tire and tools have arrived. I will put the tire on my I6 to ensure it fits and driving on it feels OK.

I have a question. There is a thick bar that is threaded at one end and has a needle eye at the other. There is one in the picture at the top of this thread. One was also included in my tire mobility kit, so now I have two of them.

What are they for?

 

That is a recovery point tow hook. There is a circular cap on the front and rear bumpers that can be removed and that goes there for a tow truck or some other vehicle to safely pull you out of a jam without damaging your vehicle.

 

On my Genesis spare with tool kit, the tow hook (or if I'm being picky, it's really a tow eye) is shorter than the original Ioniq 6 hook. Meaning that the Genesis hook is just worthless dead weight, and you should keep your original hook the came with the car. The original is too long to fit in the tidy Genesis styrofoam tool cozy, so better to leave it in its original place.

Also, I've never heard of anyone actually using one, but I can see how it can be misused. If you use it (like getting your car winched out of a ditch), make sure the workers pull straight back or straight forward. Any sideward pull will likely bend something expensive.

If anyone finds a cool/funky/weird use for the Genesis hook, please share.

 

I have another vehicle without one. I think because it was made in the US and didn’t go overseas (Telluride). These are also used when exporting on a cargo ship to hold the vehicle in place by attaching safely to the frame because the version sold in the Middle East has them. Truck based car carriers typically strap the wheels. The bumper is plastic and there is a lot of plastic underneath the engine bay, I presume for airflow. Anyway the only thing a tow strap can latch onto is the wheel axle which could cause irreparable damage. I think enough people complained that subsequent model years now include it. This is definitely one of those things that you may never need but if you do you will be very happy you didn’t cause a problem trying to get pulled out of a rut.

 

As I said, I now have the Genesis G70 spare and tool set and I didn't want to wait for a cold rainy night to find out it doesn't fit. So I did a test run.

Boy is that car heavy. I've jacked up more than a few cars with a hand jack, but this was a new experience.

I removed the lug nuts on the driver's rear tire and took that tire off. Boy is that tire heavy.

I was glad to see the spare fit, especially the hole in the center of the wheel being the exact size of the axle.

I drove it around for a few minutes. You can really feel that spare. Especially on right turns. There was a noticeable thump from that wheel. It says to not drive over 50mph. I think it should be closer to 30mph.

Mustering superhuman strength I got the original tire back on the car.

Although it is comforting knowing that there is a spare tire option, I don't ever want to change a tire on that car ever again.

 

As I said, I now have the Genesis G70 spare and tool set and I didn't want to wait for a cold rainy night to find out it doesn't fit. So I did a test run.

Boy is that car heavy. I've jacked up more than a few cars with a hand jack, but this was a new experience.

I removed the lug nuts on the driver's rear tire and took that tire off. Boy is that tire heavy.

I was glad to see the spare fit, especially the hole in the center of the wheel being the exact size of the axle.

I drove it around for a few minutes. You can really feel that spare. Especially on right turns. There was a noticeable thump from that wheel. It says to not drive over 50mph. I think it should be closer to 30mph.

Mustering superhuman strength I got the original tire back on the car.

It is comforting knowing that there is a spare tire option, I don't ever want to change a tire on that car ever again.

I think Hankook is emerging as a big player in EV specific tires. The EV tires appear to be thicker than ICE tires and hopefully that means that a total flat tire will be less likely. Either way, I couldn’t see driving very far in the donut before it goes flat. I’m just hoping by the time I need tires I’d have to replace one, more places will carry EV specific tires.

 

I purchased a spare tire for my Honda Clarity Plug in Hybrid which also weighs over 4000 pounds. The scissor jack I tried was a lot of work to get a wheel off the ground and I didn't feel comfortable with the stability or strength of the jack. A bottle jack would not fit under the car if I let all the air out of the tire so I purchased a small floor jack that would lift 2500 pounds. It fit easily under the car and was easy to lift the tire off the ground.

 

You carry a floor Jack? How many flats are people getting?

 

If you ever get a flat in a remote location without a spare, you'll find that one is plenty.

 

Stop running over stuff .

Here was a good one a few years ago with my AUDI…..with a spare. Tire immediately went flat. Put on the spare. When I got home all I saw were the two circles. I’ve pulled out plenty of nails and screws but whatever this was was too big to come out. Low profile tires so I had road hazard. Took it to the tire shop and it was a pair of needle nose pliers. This was in the rear tire. Front must have run over it and it bounced just right, when the rear hit it, it went all the way in

 

Don't have pictures as it was 15-16 years ago. But we had a lady with jeep with those big silly knobby tires.

Some how she end up with a railroad stake inside the tire.

Now here's the kicker, this was no entry wound on the tire or rim, there was no obvious way of entry. And lastly the tire held air.

That still keeps me up at night.

 

Just a thought... has anyone considered that EVs require special tires to handle the weight? I know you shouldn't drive on any spare tire for longer than you have to, but might it be an added danger to the list of other dangers (jack failure causing serious injury, getting side swiped while changing the tire, etc.).

 

The weight ratings for these compact spare tires and jacks are high enough for the Ioniq 6. It's up to the driver to asses conditions and their own ability to properly and safely accomplish a roadside repair of any kind.

 

Thanks for the mention of Modern Spare - ordering one now!

Quoting a sixth full wheel (matching rim and tire with jacks and all that) was just shy of $1000. Theirs is basically $500 delivered.

 

Thanks for the mention of Modern Spare - ordering one now!

Quoting a sixth full wheel (matching rim and tire with jacks and all that) was just shy of $1000. Theirs is basically $500 delivered.

I bought this spare and tools off ebay when this thread started. It had the crank style jack. I've changed a few tires in my time, and as a test I put this spare on my Ioniq 6 to make sure it fit. Not only is the tire very heavy, so is the car. Lifting it on the jack was harder than I expected. It reinforces my hope that I never have a flat tire.

Still I'm relieved that if I do have a flat, I won't be stuck for hours waiting for a tow truck.

 

I ordered and received a ModernSpare for my I6.
It does take up a fair amount of space in the trunk but there's still room on top of it to store things.
I'm possibly considering putting the hardware (jack, handle, etc.) in the frunk and only keeping the spare without the case in the trunk, assuming it's not too heavy for the frunk. I may also only put the spare in the car only when I need to make a longer drive although that leaves the chance that I would forget to take it and THEN get a flat.
The sales support guy from MS told me it should fit vertically, attached to the side in the trunk. He might have been mistaking the Ioniq 6 with the 5? It certainly doesn't fit standing up in the 6.
It's a pain to carry it around but not as much as risking getting a flat. It's a decision I've made a long time ago to keep getting spare tires for my cars. To think that my 2013 Toyota Camry could fit a FULL SIZE wheel under the floor in the trunk.

edit: although the entire tool kit weighs just under 10 lbs, it doesn't fit in the frunk as it is slightly too tall for the hood to close securely. Oh well, back to the trunk it goes

 

All the tools in my kit fit in the frunk (tire jack, lug wrenches, even fit my battery operated (small) air pump, and a new air pump from Modern Spare). Takes up quite a bit of the trunk but still room for groceries or a few overnight bags (we never go very far for very long so don't need much trunk space). That's what happens when you choose form (I love the looks) over function (if you need more space then get the Ionic 5 or EV6 and you'll have more space - can get similar performance with the right model choices).

 

I will admit I didn't take the tool kit apart, perhaps that would fit if not all stacked up in the little foam container.
Thanks, I will try that.

 

Now that Modern Spare provides a proper kit for the 6 it's easier (if a bit more expensive) to go that route than my DIY version - except for storage of the jack, handle and various bits. My original Hyundai spare came with the styrofoam insert with cutouts for all that, so it all fits inside the spare neat and tidy. It's a shame the MS solution doesn't do the same.

Though it seems to me worth trying to emulate it. Maybe wrap the bundle-o-bits in some packaging foam sheet, then bind them together with some velcro straps and lay them inside the wheel?

 

That's what MS did, I was expecting a full wheel insert but it's really a foam cradle holding all the tools together and held inside the wheel with a velcro strap.

 

Here's a picture of the Ionic 6 trunk with the Modern Spare in it so you can judge for yourself if you want to take this particular option.

The small box on the right hand side is a Tack Life battery jump starter (for those days when the 12V battery gives up the ghost or to help your ICE friends with a jump). While the Modern Spare eats up a lot of space in the trunk I still have plenty of room to pick up a full load of groceries. Also, there is room on top of the spare for bags (particularly soft bags like a duffel bag. The room on the far side will easily fit a standard 20-22" Rollaboard and unless you're taking friends there is still plenty of room behind the front seats (driver and passenger). Or, you could flip down the rear seats and push the Modern Spare forward. For those wondering, I was able to fit the rest of the Modern Spare Kit (jack, lug wrenches (with three different lug nut sizes), and a 12V Tire Inflator) without any problems up front. Breaking it up this way also makes maneuvering the spare in and out of the trunk easier as the jack and other stuff is pretty heavy and really makes a difference in getting the spare into and out of the trunk. All in (including shipping and delivery insurance) I paid $525. One thing to note - the spare is super high quality - a Continental tire (need to check it often as it is rated and inflated to 60 psi), has an M speed rating (up to 80 mph - much better than slogging along at 50 mph with the old donuts (although wouldn't recommend pushing all the way up to 80) and also note that they recommend turning off traction control (doesn't mesh well as a different size than other 3 tires). Definitely impressed with the completeness and quality of the entire kit - definitely getting what you paid for. Let's not forget you have a $40,000+ vehicle (mine totaled out at $50K for a Ionic 6 SE AWD with a couple of dealer add ons (window tint and 3M Pro Bra (did a great job of keeping stone chips off the hood and also mirror wraps and door edges on my trade in 2018 Sonata SEL ICE vehicle). I've had too many unrepairable flats over the years and now live in SW US with no desire to spend Hour(s) in 110 heat in summer waiting for road side assistance. To each his own.

 

Here's a picture of the Ionic 6 trunk with the Modern Spare in it so you can judge for yourself if you want to take this particular option. View attachment 56040

The small box on the right hand side is a Tack Life battery jump starter (for those days when the 12V battery gives up the ghost or to help your ICE friends with a jump). While the Modern Spare eats up a lot of space in the trunk I still have plenty of room to pick up a full load of groceries. Also, there is room on top of the spare for bags (particularly soft bags like a duffel bag. The room on the far side will easily fit a standard 20-22" Rollaboard and unless you're taking friends there is still plenty of room behind the front seats (driver and passenger). Or, you could flip down the rear seats and push the Modern Spare forward. For those wondering, I was able to fit the rest of the Modern Spare Kit (jack, lug wrenches (with three different lug nut sizes), and a 12V Tire Inflator) without any problems up front. Breaking it up this way also makes maneuvering the spare in and out of the trunk easier as the jack and other stuff is pretty heavy and really makes a difference in getting the spare into and out of the trunk. All in (including shipping and delivery insurance) I paid $525. One thing to note - the spare is super high quality - a Continental tire (need to check it often as it is rated and inflated to 60 psi), has an M speed rating (up to 80 mph - much better than slogging along at 50 mph with the old donuts (although wouldn't recommend pushing all the way up to 80) and also note that they recommend turning off traction control (doesn't mesh well as a different size than other 3 tires). Definitely impressed with the completeness and quality of the entire kit - definitely getting what you paid for. Let's not forget you have a $40,000+ vehicle (mine totaled out at $50K for a Ionic 6 SE AWD with a couple of dealer add ons (window tint and 3M Pro Bra (did a great job of keeping stone chips off the hood and also mirror wraps and door edges on my trade in 2018 Sonata SEL ICE vehicle). I've had too many unrepairable flats over the years and now live in SW US with no desire to spend Hour(s) in 110 heat in summer waiting for road side assistance. To each his own.

Glad you like your solution. One thing I'll reiterate is that vertical height is very tight, and if you want to put a suitcase on top of the spare you might get a surprise. My spare is 135 mm wide while yours is 145 mm. That's enough of a difference to keep me from fitting my luggage as shown in the first post here. It's that tight. (And you only get that height on the right side, since the rear speaker intrudes into the trunk on the left.)

It is possible to to get luggage that's just a bit narrower, but that's another hassle and expense.

And I still have to see if the original inflator can reach 60 psi. Wouldn't be surprised if it can't, which means another bit of shopping/expense.

Also, are you sure your tire isn't rated for 80 kph, not mph? 80 kph is 50 mph. If you're right that is a significant advantage.

 

It's an M Speed Rating which I confirmed on DOT is 81 MPH (round # of 80 sound fine). When you get to my age you tend towards (finances permitting) easy solutions (rather than less expensive but more complicated). We don't do long trips due to some deficits of previous lives although we hope to get back to traveling more. We pray that everyone finds a solution that works for them.

 

My original Hankook temporary spare also has an M speed rating, good for 81 mph (130 kph). And a warning in big, molded-in letters saying not to exceed 50 mph. The wheel has the same warning. (Does your tire have a similar molded-in warning? Continental's sContact temporary spare does, but that seems to be a different tire than what's pictured on Modern Spare's site.)

I'm not sure what to make of that. If you exceed 50 mph in your spare-equipped Hyundai running its OEM temprorary spare and you have an issue, I'm pretty sure Hyundai will tell you you're on your own - regardless of the speed rating for the tire. What does Modern Spare say about maximum speed on their spare? Seeing as how their products apply to vehicles that didn't come with a spare from the factory, there are not going to be any factory recommendations on maximum speed coming from the factory.

What does Modern Spare say? I'm betting they'll tell you not to exceed 50 mph, and that the speed rating on the tire is a different matter. Which suggests their mention of an 80 mph speed rating for the tire is misleading and they know it.

Or not. They might surprise us with their answer and we'd all learn something.

Your understanding of allowed speed is likely misinformed and it demands a resolution. I don't own any of their products so I really have no standing. Can you ask and report back?

{EDIT}
Found it. From their FAQs:

Modern Spare equips all spare kits with tires designated for “temporary use”. In line with our goal of creating a vastly improved spare tire, these radial tires are rugged and reinforced with a well-designed tread pattern. Going a step further, we specifically choose tires with a DOT “M” speed rating. This M rating indicates the tire has been tested to safely operate at constant speeds up to 81 mph. Although it is rated at 81MPH, Many tire manufacturers will state the speed should not exceed 50mph due to the tire’s narrow size. Simply put, the narrow size of the tire (which is designed to save space) may result in a braking and handling difference compared to your normal factory tire. For that reason, when the spare is mounted, drive your vehicle with caution in mind and with good judgment. The DOT M speed rating is beneficial in situations of heavy, fast-moving freeway traffic that may require faster speeds. At times staying at equal speeds with heavy traffic is needed until you can safely exit a congested freeway. It is always best to drive with caution under such conditions and use your best judgment to stay safe.

So there's no real advantage to their spare compared to others, because most OEMs already use the M speed-rated temporary spares. You won't fry the tire by exceeding the 50 mph recommended speed, but the lower traction of the spare limits the capabilities of the car so it's on you to drive accordingly. OEMs cover that with a blanket 50 mph limit.

Frankly that seems pretty misleading to me. If there are even a small number of manufacturers (or just one) that don't use an M-rated tire, that gives MS license to claim "vastly improved" and "going a step further" when M-rated tires are actually pretty common. They lead you on in the product descriptions and only set the record straight in the FAQs. I seriously doubt you're the only person who thought they were getting an improved tire when they're not.

I vaguely remember looking at MS before they made a kit for the 6, seeing that 80 mph claim and thought it smelled a bit. Then I found the salvage Hyundai spares on eBay (both Hankook and Kumho, didn't matter) had an M rating too (along with the above-mentioned '50 mph MAX' warnings on the tire wheel). Didn't look into it any further. I'm betting it would be hard to find a temporary spare that's not at least M-rated.
{/EDIT}

 

My original Hankook temporary spare also has an M speed rating, good for 81 mph (130 kph). And a warning in big, molded-in letters saying not to exceed 50 mph. The wheel has the same warning. (Does your tire have a similar molded-in warning? Continental's sContact temporary spare does, but that seems to be a different tire than what's pictured on Modern Spare's site.)

I'm not sure what to make of that. If you exceed 50 mph in your spare-equipped Hyundai running its OEM temprorary spare and you have an issue, I'm pretty sure Hyundai will tell you you're on your own - regardless of the speed rating for the tire. What does Modern Spare say about maximum speed on their spare? Seeing as how their products apply to vehicles that didn't come with a spare from the factory, there are not going to be any factory recommendations on maximum speed coming from the factory.

What does Modern Spare say? I'm betting they'll tell you not to exceed 50 mph, and that the speed rating on the tire is a different matter. Which suggests their mention of an 80 mph speed rating for the tire is misleading and they know it.

Or not. They might surprise us with their answer and we'd all learn something.

Your understanding of allowed speed is likely misinformed and it demands a resolution. I don't own any of their products so I really have no standing. Can you ask and report back?

{EDIT}
Found it. From their FAQs:

Modern Spare equips all spare kits with tires designated for “temporary use”. In line with our goal of creating a vastly improved spare tire, these radial tires are rugged and reinforced with a well-designed tread pattern. Going a step further, we specifically choose tires with a DOT “M” speed rating. This M rating indicates the tire has been tested to safely operate at constant speeds up to 81 mph. Although it is rated at 81MPH, Many tire manufacturers will state the speed should not exceed 50mph due to the tire’s narrow size. Simply put, the narrow size of the tire (which is designed to save space) may result in a braking and handling difference compared to your normal factory tire. For that reason, when the spare is mounted, drive your vehicle with caution in mind and with good judgment. The DOT M speed rating is beneficial in situations of heavy, fast-movThaning freeway traffic that may require faster speeds. At times staying at equal speeds with heavy traffic is needed until you can safely exit a congested freeway. It is always best to drive with caution under such conditions and use your best judgment to stay safe.

So there's no real advantage to their spare compared to others, because most OEMs already use the M speed-rated temporary spares. You won't fry the tire by exceeding the 50 mph recommended speed, but the lower traction of the spare limits the capabilities of the car so it's on you to drive accordingly. OEMs cover that with a blanket 50 mph limit.

Frankly that seems pretty misleading to me. If there are even a small number of manufacturers (or just one) that don't use an M-rated tire, that gives MS license to claim "vastly improved" and "going a step further" when M-rated tires are actually pretty common. They lead you on in the product descriptions and only set the record straight in the FAQs. I seriously doubt you're the only person who thought they were getting an improved tire when they're not.

I vaguely remember looking at MS before they made a kit for the 6, seeing that 80 mph claim and thought it smelled a bit. Then I found the salvage Hyundai spares on eBay (both Hankook and Kumho, didn't matter) had an M rating too (along with the above-mentioned '50 mph MAX' warnings on the tire wheel). Didn't look into it any further. I'm betting it would be hard to find a temporary spare that's not at least M-rated.
{/EDIT}

Thanks for all the research and a good warning. I selected Modern Spare because I got everything I needed from one place for one price. Could I have saved money by buying the tire, finding an appropriate jack (always hated the jacks that came with donut spares), lug wrench, etc. - Yes Probably. I went the simple and easy route with Modern Spare and have been impressed with their kit. Everything matches up and I pray it all stays in their place and never need them. I will plan to drive slower (if possible) and keep it to 50 mph on my way to the tire place.

 

Modern Spare's tire works well on my Ioniq 6. I bought a scisor jack and keep tools and that jack inside the recess in that spare. With the pinch weld frame jack point you need a hockey puck of rubber to safely lift this car. But that is also rather simple to deal with. Complaints in this thread about the trunk size seem odd to me. I've taken long trips with 2 suitcases and this spare time in the Ioniq 6's trunk. Buy a van is you actually need a van. But I have no regrets about buying this car. The engineering and quality are impressive. This car is very comfortable and safe. I evade traffic problems with this car, as it accelerates impressively under 50 MPH. People like the Ioniq 6's looks. This car is going to scare Tesla.

 

Modern Spare's tire works well on my Ioniq 6. I bought a scisor jack and keep tools and that jack inside the recess in that spare. With the pinch weld frame jack point you need a hockey puck of rubber to safely lift this car. But that is also rather simple to deal with. Complaints in this thread about the trunk size seem odd to me. I've taken long trips with 2 suitcases and this spare time in the Ioniq 6's trunk. Buy a van is you actually need a van. But I have no regrets about buying this car. The engineering and quality are impressive. This car is very comfortable and safe. I evade traffic problems with this car, as it accelerates impressively under 50 MPH. People like the Ioniq 6's looks. This car is going to scare Tesla.

Our cars have terrible jacking points, This is what I use with a regular floor jack https://a.co/d/5BVCx4n, I hate and will not buy a car with screwed up pinch welds. This is one of my main points with jacking our cars on the side of a road especially with those super sketch and annoying scissor jacks.