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      09-08-2011, 04:46 PM   #73

Drives: E30 M3, F10 M5
Join Date: Jun 2009
Location: Bay Area, CA

iTrader: (6)

Originally Posted by SmartBastard View Post
Is anyone running 285/35/18 on the rear with R18x10? Would it be too much?

Tire calculator is saying that 285 would match the original size even better ...

Specification  Sidewall  Radius  Diameter  Circumference  Revs/Mile  Difference
255/40-18         4.0in  13.0in    26.0in         81.8in        775        0.0%
275/35-18         3.8in  12.8in    25.6in         80.4in        788       -1.7%
285/35-18         3.9in  12.9in    25.9in         81.2in        780       -0.7%
The width would be the concern. It could be made to work, but it would depend on the tire and what is done to the car. If it were a Nitto NT-05 or Hankook RS-3 there would be a high likely hood of an issue just bolted on since it's taller than a 275/35 which many have experience with, and it's wider as well (both height and width impact fender clearance as you move out). added negative camber or a rear fender roll would probably be enough, but there could also be clearance issues on the inside rear requiring a spacer, which in turn will be an issue on the fender side.

I would not recommend it to anyone afraid of doing all that is needed to make it work.