Quote:
Originally Posted by Bmw240xi18
What do you think of going 235 all around instead of 245? Will the 10 point drop cause any issues in the rear? Any thoughts or guidance would be nice.
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You're in luck. Prior to my M235, I had a 2012 WRX with set square 235/40R18 Michelin Pilot Supersport tires on 18x8.5 Enkei Rajjins. Unfortunately, the bolt pattern for the Rajjins won't work on the M235, but i was curious on how the 235/40r18 MSS compared to the my M235's 225/40 and 245/35 MSS setup. These are my findings.
1) Overall tire width on the 235/40 is about 1/4"+ greater than the 245/35. Tread width wise, the MPSS 245/35 tires are blockier and have a fractionally wider contact patch.
2) The 235/40 is right around 1/4" taller overall than the 245/35. Keep in mind the 235/40 tires have about 15K miles thus are fractionally shorter than new.
3) The 235/40 tires have about 1/2" more tread width than the 225/40 and are nearly 3/4" wider overall. This is great for those wanting to reduce understeer.
4) The 235/40 is about 1/8" taller than the 225/40.
Word of caution: When I experimented with the Alutec 18X8 245/35 tires in the front, the tires cleared the shock housing by about 8mm and when I did a test drive, nothing rubbed. Given that the 235/40R18 MPSS tires are fractionally wider overall than the 245/35, the tires will sit closer to the shock housing (above 1/8" closer). It should be fine, but I just want it known than I haven't verified the fitment.
Finally, I know for a fact that people have and are running 235/40R18 tires on 18X8 and 18X8.5 rims and don't have clearance issues. I'd suggest searching the forums to see what you can find.