275F/295R on stock wheels

[foywilliamd]

Morning all!

I’m looking to put some larger tires on my Supra. I like the stock wheels and will be keeping them. Has anyone run 275/30R19 front and 295/30R19 rear on stock wheels and stock suspension? Did you need spacers? Any rubbing?

Also if you went with a different aspect ratio, please mention that as well.

Thanks in advance!

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[dzeleski]

https://www.supramkv.com/threads/tr...-rear-wheels-on-2021-supra.12191/#post-176432

You cant just slap larger tires on a rim. Tires are specd for specific width wheels, going out side of that changes the entire dynamic that tire provides. The car will not handle or feel correct with oversized tires like that.

https://www.tiresandco.ca/tire-equivalence-advice.html

 

[Bassoonytoon]

You cant just slap larger tires on a rim. Tires are specd for specific width wheels, going out side of that changes the entire dynamic that tire provides. The car will not handle or feel correct with oversized tires like that.

https://www.tiresandco.ca/tire-equivalence-advice.html

From his question and concerns I wouldn’t say he’s just slapping on larger tires. He’s looking for informed information. It’s true that adding tires that are too large for a rim can cause problems but that’s not what is happening here. 275/35/19 will fit on a 9” wide rim and 295/45/19 will fit on a 10” rim - this is according to Michelin’s own recommendations for PSS tires.

https://www.michelin.ca/en/auto/tires/michelin-pilot-super-sport?tyreSize=19

I would also be interested in knowing if there will be any rubbing with a stock suspension setup. The speedometer will read around 2% lower but as it already reads around 2% high, this shouldn’t be a problem.

 

[GMsuperfan]

Helpful discussion in here too, many folks running larger tires on stock wheels: https://www.supramkv.com/threads/what-size-rears-are-you-running-on-your-stock-wheels.7889/

 

[Bassoonytoon]

Helpful discussion in here too, many folks running larger tires on stock wheels: https://www.supramkv.com/threads/what-size-rears-are-you-running-on-your-stock-wheels.7889/

Thank you for sharing this thread. This is very appreciated! There is some great information there - particularly for rear tires. The fronts are what is worrying me. I’d prefer to not run spacers if I don’t have to. What I would like is to get some 295/35/19 PSS for the rear and move the current 275’s to the front but I can’t seem to find an answer about doing so without modified suspension. My thought is that if it fits lowered, it SHOULD fit stock but I could be wrong ?‍

 

[foywilliamd]

https://www.supramkv.com/threads/tr...-rear-wheels-on-2021-supra.12191/#post-176432

You cant just slap larger tires on a rim. Tires are specd for specific width wheels, going out side of that changes the entire dynamic that tire provides. The car will not handle or feel correct with oversized tires like that.

https://www.tiresandco.ca/tire-equivalence-advice.html

You CAN just “slap larger tires” on a rim. All wheels are spec’d for a range of section widths. Perhaps you are referring to the “ideal” or “as-tested” section width for these wheels. I don’t care about that.
My concern lies entirely in whether or not there will be rubbing issues on UCAs or other suspension components.

 

[foywilliamd]

Thank you for sharing this thread. This is very appreciated! There is some great information there - particularly for rear tires. The fronts are what is worrying me. I’d prefer to not run spacers if I don’t have to. What I would like is to get some 295/35/19 PSS for the rear and move the current 275’s to the front but I can’t seem to find an answer about doing so without modified suspension. My thought is that if it fits lowered, it SHOULD fit stock but I could be wrong ?‍

This is my thought as well. I know there are plenty of people running 275s in the front with aftermarket wheels (and in many cases, lowering springs) and just looking for someone who has done what we’re talking about. I have a good relationship with a tire shop nearby and may just have them install the larger tires and see how it feels, if there’s rubbing etc. Worst case scenario, may need some small spacers, though I’d rather not.

 

[Bassoonytoon]

This is my thought as well. I know there are plenty of people running 275s in the front with aftermarket wheels (and in many cases, lowering springs) and just looking for someone who has done what we’re talking about. I have a good relationship with a tire shop nearby and may just have them install the larger tires and see how it feels, if there’s rubbing etc. Worst case scenario, may need some small spacers, though I’d rather not.

Yeah it would be nice to know before making the purchase. I’ve seen that 265f/285r works on stock components. I can get a set of Firehawk Indy 500’s in these sizes for the price of rear MPSS in 295/35/19. I would prefer to stay with the Michelins for now so hopefully someone with experience in this setup can offer some insight. If not, maybe I’ll try the Firehawks.

 

[zrk]

I'm running 285/35/19 R888Rs on the rear, 15mm spacers, 265/35/19 on the front 13mm spacers. No issues with rubbing or otherwise. Also lowered on Swift springs.

Not sure if that's helpful or not, but I wanted to throw in my 2c.

 

[foywilliamd]

I'm running 285/35/19 R888Rs on the rear, 15mm spacers, 265/35/19 on the front 13mm spacers. No issues with rubbing or otherwise. Also lowered on Swift springs.

Not sure if that's helpful or not, but I wanted to throw in my 2c.

I appreciate it thank you! I’ve read lots of times that the 265/285 setup works and I’m trying to push the limits jussssst a little bit haha

 

[dzeleski]

From his question and concerns I wouldn’t say he’s just slapping on larger tires. He’s looking for informed information. It’s true that adding tires that are too large for a rim can cause problems but that’s not what is happening here. 275/35/19 will fit on a 9” wide rim and 295/45/19 will fit on a 10” rim - this is according to Michelin’s own recommendations for PSS tires.

https://

Helpful discussion in here too, many folks running larger tires on stock wheels: https://www.supramkv.com/threads/what-size-rears-are-you-running-on-your-stock-wheels.7889/

www.michelin.ca/en/auto/tires/michelin-pilot-super-sport?tyreSize=19

I would also be interested in knowing if there will be any rubbing with a stock suspension setup. The speedometer will read around 2% lower but as it already reads around 2% high, this shouldn’t be a problem.

You CAN just “slap larger tires” on a rim. All wheels are spec’d for a range of section widths. Perhaps you are referring to the “ideal” or “as-tested” section width for these wheels. I don’t care about that.
My concern lies entirely in whether or not there will be rubbing issues on UCAs or other suspension components.

You can do anything. Doesn’t mean you should. You are changing the shape of the tire surface that touches the ground, the flexibility of the sidewall, and the dynamics of how the suspension interacts with the tires. You will change how the car feels and drives. The car is going to feel softer and you will feel the the tire folding under the rim when at or near the limit.

If you don’t care about that and just want larger tires then full send.

Edit: https://www.willtheyfit.com/index.p...ct2=35&wheel_size=19&wheel_width=9&offset2=32

 

[thtsupra]

I'm running 285/35/19 R888Rs on the rear, 15mm spacers, 265/35/19 on the front 13mm spacers. No issues with rubbing or otherwise. Also lowered on Swift springs.

Not sure if that's helpful or not, but I wanted to throw in my 2c.

can you show some pics?

 

[zrk]

can you show some pics?

Check my build thread/insta links in my sognature

 

[Escapist]

What are your intentions, are you looking for more grip at the track or just like the look of bulging tires?

 

[digicidal]

I'm running a 265/285 setup as well (PS4S) and there's still a tiny bit of roll to the rear sidewall. The fronts are nearly square so while 295 shouldn't have any issues on the rears... you'd definitely want spacers on the fronts I'd think at 275.

Based on both how it drives and how it looks... 265/285 is how it should have come from the factory IMO. Much better grip - enough to cost me a couple MPG... though how much of that is increased resistance and how much is more confidence (resulting in more go-pedal use) is debatable.

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