No, 20" x 11" is the largest without altering the inside of the wheel well or the wheel well lips.
Would seem to me it would depend on the offset. I have 10" in the rear and about 1" of that 10", due to the offset, lies outside of the car.
No it doesn't. You can't fit a bigger wheel than 11" no matter what the offset.
I was running a 19x11 with a 325 and it barely fit...
so was it tire clearance that was the issue? cuz i'm looking at 19x11/11.5 with a 275
You can actually go up to 12" wide with the right offset. I have an 08 GT-500 that has been Super Snaked. I have had the 20" Shelby Razors widened to 11.75" by Weldcraft. I am running 305/35's with no rubbing issues. I am going to 335's shortly. There are several SS owners that have done this. Some have widened their wheels to 12"'s. This requires cutting the bump stop cover to keep it from rubbing there. Otherwise it works. The 11.75" width seems to be the optimum width. 335 is the widest tire that will fit. 345's rub. with the 335's it helps to have an adjustable pan hard bar to allow the rear end to be perfectly centered.
Hope this helps.
BJ
Griggs Racing 315mm Tire Shock Brackets also requires Shock Bracket Kit (05+) which allows use of 10.5"/11" wheels and 305/315mm (18) tires.
The crazy thing is with there SLA kit you can actually run 315 mm tires all the way around! Our plan with our project car is to run 315 mm Hoosier R6's for track days all the way around!
Nice! What wheel are you planning to mount that on?