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      01-11-2010, 06:34 AM   #22
e36s54, e70x5d
mastek's Avatar

Drives: slow
Join Date: Aug 2008
Location: Los Angeles, CA

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Originally Posted by Lemans_Blue_M View Post
Ahh, now that makes sense.

This explains why he was rubbing on the liners...

The 265/35/18 PS2 tire has an OD of 25.3", and a 265/40/18 has an OD of 26.3" which is a huge difference in tire fitment terms. His 265/40/18 tire was simply too big fit inside the front wheel well. It wouldn't have mattered if they were PS2's or not, that tire size has no chance of working.

A 265/40/18 tire would eventually rub a hole in the wheel liner. The clearances are so tight, that you are limited to 26.0" OD max. (and even that may rub under full steering lock)

The BMW engineers were just stingy with the real estate in the front wheel well.

Now the 265/35/18 mounted to the 18x9.5 +25 offset wheel, will have a lot more clearance to work with...since the OD of the tire is actually 1" smaller.

The PS2 tires that wrap the front OE 19" (245/35/19) have an OD of 25.8 -- are you positive about that 26.0 max OD in the front wheel well?

Cause I was planning on a 265/35/19 on a 9" front wheel -- and now I'm thinking it wont work.
Would 1/2" over the diameter of a wheel/tire make that much of a difference in clearance?

Last edited by mastek; 01-13-2010 at 09:30 PM.