Will changing wheel size damage the transmission

[lbpuppy]

Recently I purchased and had installed the following wheels:
Tsw Mirabeau Staggered set
9x20 front
10x20 rear

On a Genesis 2015.

I have new TPMS in the weels but the Genesis didn't pick it up. So I took it to my local Huyndai dealer to see if my TPMS in the car needs to be reset. The mechanic there said there was nothing he could do because I changed the wheels size. Then went on to say that because I changed the wheel size it will affect my warranty because the timing on the transmission will be affected. Is this true? I know some people on the group have a staggered set also.

 

[Huddleston]

the mechanic is wrong. its as simple as that. your transmission will be fine, the ONLY thing that could possibly be impacted is the speedometer but that would be negligible at best. I cant speak to warranty implications but it would be rather difficult to prove that wheels that are different in diameter by only one inch could had such an adverse impact on the tranny. mod on my good friend.

 

[Mark_888]

the mechanic is wrong. its as simple as that. your transmission will be fine, the ONLY thing that could possibly be impacted is the speedometer but that would be negligible at best. I cant speak to warranty implications but it would be rather difficult to prove that wheels that are different in diameter by only one inch could had such an adverse impact on the tranny. mod on my good friend.

Knowing how Hyundai works, if the transmission failed (a big if) and one brought the car in with 20 inch wheels, they might try to deny the warranty. Whether they can legally do that is another matter, but it might cost some money to get them to honor the warranty.

All this assumes that the total diameter of the new wheels and tires are about the same as the OEM. If not, I don't think one would fare well in the courtroom.

 

[Genentec]

yes don't mess with the wheels until after warranty. yeah it sounds ridiculous but thats how hyundai rolls. cheap and shady.

they will do anything to get out of their warranty obligations.

Knowing how Hyundai works, if the transmission failed (a big if) and one brought the car in with 20 inch wheels, they might try to deny the warranty. Whether they can legally do that is another matter, but it might cost some money to get them to honor the warranty.

All this assumes that the total diameter of the new wheels and tires are about the same as the OEM. If not, I don't think one would fare well in the courtroom.

 

[Analog]

So I don't know that the ill-hill towards Hyundai is called for in this case. In a much simpler scenario, having 19s on the fronts and 20s on the back on any AWD vehicle is going to cause problems. In many it will void the warranty on related items.

For example Subaru’s tolerences are very tight, off the top of my head even having new tires on the front and old tires on the back can cause problems if you’re on the extreme. I believe the difference was something like 1/4” on a string wrapped around the outside (doubt I could provide a reference for that!) Though, within the same wheel dimensions that probably wouldn’t void your warranty… but voiding warranties and avoiding problems altogether are different things.

In this case I’m afraid I don’t know enough about wheels to really answer the question. The only difference between a 9” and 10” deep 20” diameter wheel should be the offset, and I don’t know if having a positive or negative offset would actually void the warranty. I don’t remember reading anything about that in the Genesis manual; then again, I wouldn’t have been paying attention since I didn’t plan on getting custom wheels.

For your case, if you told me you had a staggered set I would assume the rears are larger than the fronts and if asked I would guess you’d be voiding your warranty (with any AWD vehicle.) But just having different depth wheels? I doubt it.

 

[srobak]

Then went on to say that because I changed the wheel size it will affect my warranty because the timing on the transmission will be affected. Is this true?

Is your car AWD?
If no - then no, it is not true.
If yes - are all the tires the same diameter?
If no - then PROBABLY - because too much of a difference can exceed the limits of the AWD system. There is a lot more allowance for different diameters than in old-school 4WD systems - but even it has it's limits.
If yes - then probably not.

In a much simpler scenario, having 19s on the fronts and 20s on the back on any AWD vehicle is going to cause problems. In many it will void the warranty on related items.
[...]
even having new tires on the front and old tires on the back can cause problems if you’re on the extreme. I believe the difference was something like 1/4” on a string wrapped around the outside (doubt I could provide a reference for that!)

This has been the general rule of thumb going all the way back to 4X4 days of long ago - reason being that the wheel axles and drive shafts were mechanically locked together. While the nature of rubber allowed for some degree of latitude - it wasn't much. If the tires did not wear together or were not rotated often enough it would cause an issue and if they were too far out of whack it could very easily turn the innards of a transfer case into a tomb of metal shavings. Modern AWD systems do have a lot of intelligence to manage the engaging of the different drive trains - but even those have their limits.

 

[lbpuppy]

My Genesis is not the All Wheel Drive.

Is your car AWD?
If no - then no, it is not true.
If yes - are all the tires the same diameter?
If no - then PROBABLY - because too much of a difference can exceed the limits of the AWD system. There is a lot more allowance for different diameters than in old-school 4WD systems - but even it has it's limits.
If yes - then probably not.



This has been the general rule of thumb going all the way back to 4X4 days of long ago - reason being that the wheel axles and drive shafts were mechanically locked together. While the nature of rubber allowed for some degree of latitude - it wasn't much. If the tires did not wear together or were not rotated often enough it would cause an issue and if they were too far out of whack it could very easily turn the innards of a transfer case into a tomb of metal shavings. Modern AWD systems do have a lot of intelligence to manage the engaging of the different drive trains - but even those have their limits.

 

[srobak]

Then you are good to go.

 

[LandoAWD]

...unless the rolling diameter buggers with the TCS. Not knowing the full wheel/tire spec, it is a possibility.

 

[lbpuppy]

...unless the rolling diameter buggers with the TCS. Not knowing the full wheel/tire spec, it is a possibility.

Front - Toyo Tires Extensa HP 245/35R20 95V
20x9 TSW Mirabeau Silver

Rear - 285-30-20 Hankook Ventus V12 EVO II
20x10 TSW Mirabeau Silver

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[whizkid]

a picture with new shoes will be a plus

 

[wasnt]

yes don't mess with the wheels until after warranty. yeah it sounds ridiculous but thats how hyundai rolls. cheap and shady.

they will do anything to get out of their warranty obligations.

All brands I've dealt with are like that. Honda, Mazda, Ford, Jeep and Hyundai. Can't say I blame them honestly.

 

[lbpuppy]