Rear tire size

[Junkyard Dog]

there is but the overall diameter will be smaller than stock which will look ugly because it will have bigger wheel well gap

What is the stock diameter? 315/30R20 is a tall tire.

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[A.alansari]

What is the stock diameter? 315/30R20 is a tall tire.

The stock is 27.7

315/30 will be

27.4

 

[Junkyard Dog]

The stock is 27.7

315/30 will be

27.4

That is 3/10 of an inch. Only half of that difference in diameter is at the top of the tire, at the wheel well, so 3/20 of any inch. That is barely an eighth of an inch. You won't even be able to see this. You would not be able to notice even if the original tire was there for comparison, but it won't be.

Your car.

Your tire.

But I don't think you'll be able to see it.

And your car will drive correctly.

 

[Junkyard Dog]

I don't know what width front wheels you have, but a 265/35R19. OOPS, I meant 265/35R20 Pirelli PZ4 is 27.3" diameter, so the front and rear would be almost exactly the same height.

Frankly, I would have gone with a wider wheel and a 305/30 front and a 315/30 rear.
That is what is on my car, but in 19" wheels, 10.5 in front and 11" in rear.

 

[A.alansari]

That is 3/10 of an inch. Only half of that difference in diameter is at the top of the tire, at the wheel well, so 3/20 of any inch. That is barely an eighth of an inch. You won't even be able to see this. You would not be able to notice even if the original tire was there for comparison, but it won't be.

Your car.

Your tire.

But I don't think you'll be able to see it.

And your car will drive correctly.

but then the front tire will be taller than the rear

 

[A.alansari]

I don't know what width front wheels you have, but a 265/35R19 Pirelli PZ4 is 27.3, so the front and rear would be almost exactly the same height.

Frankly, I would have gone with a wider wheel and a 305/30 front and a 315/30 rear.
That is what is on my car, but in 19" wheels, 10.5 in front and 11" in rear.

i got 20x10 front and 20x11 rear

I was planning to get 275 35 r20 front and 305 35 r20 rear but unfortunately the rear size is not available here

 

[Junkyard Dog]

I think my other post was made while you were posting.

On the Dark Horse handling package, the front tire is a little taller than the rear (Trofeo RS). If it had not been for the diameter listing online at Tire Rack, I would have never known.

Nevertheless, unless your front tire is already set, a 265 size will be a tenth of an inch smaller in diameter than the rear diameter. See post # 19

 

[Junkyard Dog]

I don't know what width front wheels you have, but a 265/35R20 Pirelli PZ4 is 27.3" diameter, so the front and rear would be almost exactly the same height.

And they recommend a 9-10.5" width wheel.


OOPS! I just noticed I wrote 19. That is supposed to be a 20. I corrected it in bold in the quote above. Sorry for the typographical error.

 

[Junkyard Dog]

I hope it works out for you. I would hate to lose some functionality or have my car behave strangely due to tire diameter.

 

[A.alansari]

I hope it works out for you. I would hate to lose some functionality or have my car behave strangely due to tire diameter.

thank you i will see if i can test the size before buying if they have spare around to see how it looks on the car

 

[exm]

Stock:
255/40R19 f and 275/40R19 r

Front: 27" tall
Rear: 27.7" tall

New proposed setup:
275/35R20 f and 315/35R20 r

Front: 27.6" tall
Rear: 28.7" tall

Comparison:
Front: +0.6"
Rear: +1.0"

That's about the average for a lower suspension drop. Plus the wheels will look 'bigger'.
(that's why I think a 285/35 will be better which is +0.9" taller compared to 255/40)

 

[Junkyard Dog]

Stock:
255/40R19 f and 275/40R19 r

Front: 27" tall
Rear: 27.7" tall

Oh! I missed that they are different front and rear. So front is only 27"

I would try to get as close to 27 and 27.7 as I could get so that your car never knows the difference.

 

[Junkyard Dog]

295/30R20 is exactly 27" tall, the same as stock, and can be used on a 10-11" wheel.

 

[exm]

Oh! I missed that they are different front and rear. So front is only 27"

I would try to get as close to 27 and 27.7 as I could get so that your car never knows the difference.

You would want to get 265/35R20 front (+0.3) and 285/35R20 rear (+0.2). But you might as well go 275/35R20 square.

 

[Yamazuki]

thank you i will see if i can test the size before buying if they have spare around to see how it looks on the car

I've been seeing ads for this thing popping up a lot lately. It's an extra cost, but it's supposed to take the guess work out of it.

https://claytonramstead.com/products/wheel-fitment-tool

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