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Discussion starter · #21 · (Edited)
Thanks for the pictures! I would like to update the original posts with the ET 53 correction, but it won't let me edit. MODERATOR: can you please edit post #3 in this thread to say offset 53 mm instead of 50 mm for the 17" wheel please?

The reason that your car only lists the 15" and 17" wheels is because it is a hybrid. The 16" wheels only come on the electric model.
 
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I still don't know if I'm going to go with an Ioniq or Niro. The Niro comes with 16 or 18" wheels, with the larger one taking the same kind of mileage hit as the 15 versus 17" wheels. I'm curious is these wheels are compatible with both models and if the 15" ones do better than the 16" one for mileage. The Niro gets 10/12 percent less mpg than the Iconic, and while most of the is the increased coefficient of drag and larger frontal area, if any of it is due to the wheel size, I'd be interested in the 15" wheels if I end up with a Niro.
The Niro tires have a slightly bigger diameter than the Ioniq tires, so I suppose one can't easily fit Ioniq wheels on a Niro. One may have to skew the ESP and odometer.
Niro 205/60 R16. Diameter is 2x60%x205mm+16''=246mm+16''=652mm
Ioniq 225/45 R17. Diameter is 2x45%x225mm+17''=202mm+17''=634mm
 
I still don't know if I'm going to go with an Ioniq or Niro. The Niro comes with 16 or 18" wheels, with the larger one taking the same kind of mileage hit as the 15 versus 17" wheels. I'm curious is these wheels are compatible with both models and if the 15" ones do better than the 16" one for mileage. The Niro gets 10/12 percent less mpg than the Iconic, and while most of the is the increased coefficient of drag and larger frontal area, if any of it is due to the wheel size, I'd be interested in the 15" wheels if I end up with a Niro.
The Niro tires have a slightly bigger diameter than the Ioniq tires, so I suppose one can't easily fit Ioniq wheels on a Niro. One may have to skew the ESP and odometer.
Niro 205/60 R16. Diameter is 2x60%x205mm+16''=246mm+16''=652mm
Ioniq 225/45 R17. Diameter is 2x45%x225mm+17''=202mm+17''=634mm
I don't understand your calculations. Sorry. Also how can you work in mm and inches in the same calculation. Shouldn't be working in all imperial or all metric?
 
The Ioniq hybrid comes with 15" or 17" wheels, and the Ioniq HEV comes with 16" wheels. Do they not all have the same diameter? Also not understanding how the width of the tire in your calculations could be a factor.
 
I don't understand your calculations. Sorry. Also how can you work in mm and inches in the same calculation. Shouldn't be working in all imperial or all metric?
Tire specifications always mix up metric and imperial values. Not my fault, and don't know why. Maybe because the tire was invented by a Scott, then the air chamber was invented by a Frenchman.

225/45 R17 means:
Width 225 millimeters
Profile height 45 percent of tire width
Rim diameter 17 inches

The radius of the complete wheel is the radius of the rim, plus the profile height of the tire.

So the diameter of the tire or complete wheel is the diameter of the rim, plus twice the profile height of the tire.

For a 225/45 R17, the profile height is 225x0.45=202mm

The diameter of the rim is 17''=432mm

So the total diameter of the tire is 432+202=634mm
 
The Ioniq hybrid comes with 15" or 17" wheels, and the Ioniq HEV comes with 16" wheels. Do they not all have the same diameter? Also not understanding how the width of the tire in your calculations could be a factor.
Yes, absolutely, the Ioniq wheels have the same total diameter whatever the diameter of the rims. (For the HEV wheels I haven't done the math, but I would suppose the diameter is the same)
But the Niro wheels have a different diameter, slightly bigger than the Ioniq wheels. Which is why I don't think you could easily put the 15'' Ioniq wheel on a Niro, even assuming the bolt pattern is the same.

The width of the tire is a factor in the calculation of the absolute profile height, because the profile height is specified as percentage of width. For example the profile height of the 205/60 R16 Niro tires is not 60mm or 60inches. It is 60% of 205mm, that is 123mm.
 
Tire specifications always mix up metric and imperial values. Not my fault, and don't know why. Maybe because the tire was invented by a Scott, then the air chamber was invented by a Frenchman.

225/45 R17 means:
Width 225 millimeters
Profile height 45 percent of tire width
Rim diameter 17 inches

The radius of the complete wheel is the radius of the rim, plus the profile height of the tire.

So the diameter of the tire or complete wheel is the diameter of the rim, plus twice the profile height of the tire.

For a 225/45 R17, the profile height is 225x0.45=202mm

The diameter of the rim is 17''=432mm

So the total diameter of the tire is 432+202=634mm

Ok I understand what you are saying better. If you want the total diameter of the wheel and tyre from the bottom (where it touches the ground) to the top of the tyre it would need to be

432 + 202 + 202 as there are two tyre walls one at bottom and one at top. No?
 
Ok I understand what you are saying better. If you want the total diameter of the wheel and tyre from the bottom (where it touches the ground) to the top of the tyre it would need to be

432 + 202 + 202 as there are two tyre walls one at bottom and one at top. No?
Well, when I wrote 0.45x225=202, I meant 2x0.45x225=202... :eek:

So you're right, there was a mistake in my explanation of the math, even though the result was correct. The tyre wall is 101mm high: 202 is already 101+101.
 
Well, when I wrote 0.45x225=202, I meant 2x0.45x225=202... :eek:

So you're right, there was a mistake in my explanation of the math, even though the result was correct. The tyre wall is 101mm high: 202 is already 101+101.
You had the right answer and numbers! ? I just got confuddled in the explanation. I am 100% with you now though. Hehe
 
The tyre is 195/65R15 91H .
Thanks for the feedback!

For the tire, I found 205/60R15 which gives me a difference of speed of -0.76km/hr at 100km/hr
195/65R15 gives an error of -2.68km/hr at 100km/hr! I thinks it's a little too much (not sure if acceptable)!

For the rims, I found something but not sure if it is the right size!

https://pmctire.com/en/steel-wheel-15x6-5x114-3-60-1-45-noir-black.tire
I wouldn't go for tires that are not homologated for the Ioniq. Last winter I used homologated 195/65R15 91H winter tires at the homologated 2.5 bar pressure, and they were fine. If you go for wider tires with a similar profile height, the total volume of air will be bigger than in the homologated tires. So maybe the pressure should be different. Isn't it needlessly complicated, and possibly dangerous considering tires are a safety equipment?
 
Hi,

Hope it's okay I'm tacking onto this thread instead of creating a new thread, as my query seems related. I apologise if this is a faux pas, I'm new here.

I just traded in my 2013 Elantra GLS for a new 2017 Ioniq Hybrid Limited (actually take delivery tomorrow). I didn't purchase winter tyres with the new car. But I still have my winter tyres from my Elantra, on rims. But the Elantra had 15" rims, while the Ioniq Ltd has 17" rims.

Can someone please tell me if it would be fine to use the 15" winters from the Elantra (would get new tyres for the existing rims, as the existing have been through 4 winters already) on the Ioniq?

I've looked up the specs: the 2013 Elantra came with 195/65R15 6Jx15 ET46 and bolt pattern of 5x114.3, which seem to be the same for the Ioniq Blue and SE trims. My Elantra winter tyres were purchased from the dealer at the time of the Elantra purchase, so should meet factory spec.

So, assuming the specs I've researched hold true, would it be advisable to keep my existing 15" rims and just get new winter tyres for them, or just shell out for new 17" rims and tyres? How much would the 15" rims offset the speedometer and odometer?

Edit: Would ground clearance also be different between the 15" and 17" rims? We can get pretty deep snow here in Ottawa and I did get stuck once or twice with my Elantra.

Any advice would be appreciated.

Thanks.
 
Discussion starter · #38 · (Edited)
The first thing to check would be to test fit the 15" wheel to see if there is any front brake caliper to wheel interference on the front of the Ioniq. Probably a good idea to check a rear wheel as well, but the larger front calipers are usually where any rubbing would occur.

There wouldn't be any change in your odometer or speedometer calibration as both tires [225/45/17 and the 195/65/15] are the same diameter.
 
You can also simply ask the service technician at the dealership you are buying the Ioniq from. Since they are both Hyundai products, they should know.
 
195/65R15 is the same as the 15" types on my hybrid

see the attached, both the 17" and 15" rims for the Ioniq both have the same circumference so ground clearance will not change

so long as both the bolt pattern and offset are the same you should be good
 

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