Originally Posted by k67p67

You can easily throw a 255 on a 9.5" and a 295 or 305 on a 10.5". No inner clearance issues with those sizes and offsets. My comments about "XXmm outboard..." are relative to the fender line.

5mm spacer is the largest I'd go while retaining the stock studs. Anything larger requires extended studs or bolt-on spacers. Some may recommend extended studs even for the 5mm spacer.