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215/40R17 & 255/35R18 acceptable?

10 February 2001
Southern California
Are these tire sizes acceptable for rims that measure 17x7.5 front and 18X9.5 rear? Will the TCS be affected? Thanks in advance.


[This message has been edited by RyRy210 (edited 05 September 2001).]

Yes this tire combo does work and if I'm not mistaking, w/o refering to the tire calculator, it is the optimum combo for keeping closest to stock. Although, I have run this before, I would definitely go wider in the rear b/c the 255 will look slightly stretched and is a very low low profile therefore offering little rim protection. With a rear rim width of 9.5", you can do 265/35 or 275/35 without compromising TCS. I believe that 215/40-17 & 265/35-18 the most commonly used application. FYI, I'm currently running 225/40-17 & 275/35-18 w/ no problems. My front rim width however is 17x8, so in your case, staying at 215 would be perfect w/ 17x7.5. Hope this helps.
I concur. Go a little wider in the rear. I would go with the 265/35.


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Re: 215/40R17 & 255/35R18 acceptable?

Agree with QWKSLVR on the stretched look of a 255 on a 9.5. 265 looks better, 255 is perfect for 9''.