Too Much Rubber???
really, it won't make a huge difference unless you're trying to squeeze every 100th out of it, but there is truth to it.
http://www.tirerack.com/tires/tirete....jsp?techid=29
i've seen others with 295/35 all 4 corners on 18x10.5 C5 DD
&
also 275/35 front & 295/35 rear or 295/35 front & 315/35 rear
but from what ive read & researched u need BFH & PHB







Im running 18x10.5 all around as well on a lowered car . 