I'm running a 20x8.5 +45 offset in the front and 20x11 and +40 offset in the rear will be putting on Techart lowering sprigs and need help with tire sizes as I've read numerous posts and I'm still not sure what guys with 20's are inding as the best result. Tire rack says 235/30/20's and 305/25/20 yet I've seen on the forum 245/30's and 325/25's HELP

 

I just put 245F and 325R on my 20's plus I just lowered with GMG springs/sways and Tarrett drop links. The rear rims are 12" wide. Look and ride are awesome. The wheel well is nicely filled out. 245/325 plus lowering will generally work for turbos, but for your 11" rims I think the 325 is too wide. The 325 Pilot SS is a 11.5" min recommended rim. When I bought the car it came with new 305's, but they were too stretched on the 12" rims. Too bad we're in different countries, otherwise I could give you a good deal on nearly new 235/305 PS2's.

As I was waiting for the 20's to be mounted, I drove on the stock 19x11 with the lowering. The smaller rim width and smaller tire plus negative camber made the wheels fairly inset btw the top outer edge of tire and bottom of fender, so you may need to add spacers afterwards.

Hope this helps.

 

Hmm so maybe the 245's in frt but 305's in back

 

You need to keep the F/R ratio similar due to the AWD differential, so you need to check if 245/305 works.

 

My tire guy recommends Nitto Invos I the appropriate size