Question on tires sizes for wide wheels, turbo body

[rnln]

Rear wheel is 17 x 11 (or 17 x 12?), tire is 315 x 35 x 17.
On the front, wheel size is 17 x 9. What tire size would you use?
Thank you.

[NY65912]

255x45

[Sicklyscott]

I used 245/40. The 45 series tire looked too big and rubbed my AC lines.

[wayner]

I run a 245/40/17 on the front. (275/40/17 rear)

In a 245. when I compared the 40 to a 45 the numbers looked like this:
40 front = 24.71
45 front = 25.68

If you step up to a 255 like NY65912 suggested, check the diameter, likely sticking close to 25"

I know many guys who run a 315 on the rear run a 255 up front.
Not all manufacturers have the same combinations either.


Nito NT01 comes in a 255/40ZR17 24.92"
Hoosier R6 only comes in a 45 but diameter is larger 255/45/17 26.20"


For reference, Nito lists these for their NT01 (the last number is the diameter)

255/40ZR17 24.92

235/40ZR17 24.40
245/45ZR17 25.55
255/40ZR17 24.92
275/40ZR17 25.55
P315/35ZR17 25.43

[NY65912]

I stand corrected. I ran Kuhmo Ecsta XS 255/40 on my IROC look.

[DRACO A5OG]

See, I am not the only one using 40's :-P

[kupcar]

245 or 255/40/17 will both work. Manufacturers will vary on widths. For instance my 255 Hoosier would rub the inside fender on a tight turn were my Kuhmos would not. Everything I've tried in 245's fit fine.

[rnln]

40 series is better than 45 series to avoid rubbing (on my wheel well), but it leave a big gap with the fender lip.
Does anyone know/care proportion between front and rear tire? I think it does affect the way the car drive and brake. How do they affect, what is acceptable, what is not. I read about it but forgot

[rnln]

Are your wheels sizes 11" and 9" width? If so, I wonder how they look on the car. Do you have pics that you can post?
Thanks.

Originally Posted by wayner

I run a 245/40/17 on the front. (275/40/17 rear)

In a 245. when I compared the 40 to a 45 the numbers looked like this:
40 front = 24.71
45 front = 25.68

If you step up to a 255 like NY65912 suggested, check the diameter, likely sticking close to 25"

I know many guys who run a 315 on the rear run a 255 up front.
Not all manufacturers have the same combinations either.


Nito NT01 comes in a 255/40ZR17 24.92"
Hoosier R6 only comes in a 45 but diameter is larger 255/45/17 26.20"


For reference, Nito lists these for their NT01 (the last number is the diameter)

255/40ZR17 24.92

235/40ZR17 24.40
245/45ZR17 25.55
255/40ZR17 24.92
275/40ZR17 25.55
P315/35ZR17 25.43

[rnln]

I have 255/40/17 on my 17 x 9 (or 9.5") right now. It looks fine, in term of tire fitting on wheel. I wonder how would 245/40 looks on the wheel, is it narrower compare to the wheel? Do you have pic of this set up?

Originally Posted by kupcar

245 or 255/40/17 will both work. Manufacturers will vary on widths. For instance my 255 Hoosier would rub the inside fender on a tight turn were my Kuhmos would not. Everything I've tried in 245's fit fine.

[kupcar]

A 245 will just be slightly narrower. Hardly noticeable. The photo shows 245/40 Hoosiers on a 930.

[wayner]

Originally Posted by rnln

Are your wheels sizes 11" and 9" width? If so, I wonder how they look on the car. Do you have pics that you can post?
Thanks.

My rears are 10.5 so that I can run a variety of sizes. If they were 11 it would limit some more readily available choices, and besides a second set of rear track wheels that I have are 12 and hold 315s. The rears on the car in this pic are 275.

The fronts are 245 on 9s

I had the rims built for the car so my centres are likely offset differently ( I know it is a 73 but the body dimensions are the same)

[rnln]

thanks guys.