Quote:
Originally Posted by paintpro21
The 9.5's will provide better sidewall support. That is very important for a heavy car. The optimal wheel width for a 255 tire is actually 9.5". You can even see in the photos that the tires are ballooning on the 9" wheels, and this will result in added sidewall flex. Everything is a compromise though, as the 9.5's are harder to fit up front, so they'll be out of reach for the majority of members. They need camber plates and a thin spacer (5mm spacers are cheap).
I would base your decision on the following:
If you have camber plates, and your coilovers are setup to properly clear the tires, then pick up the 9.5" wheels. The slightly higher cost will translate into very noticeable performance.
If you do not have camber plates, then run the 9" ET30's. That can be run with 255 street tires as well, it will just need an adjustment to your alignment depending on the tires used. If you install a 245/40/17 tire you don't need to do anything to the car. Just bolt them on and go. 245's square would work on both pre/post LCI models.
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the 9.5 also do have more concavity correct?