Steveo325 , I have 245/75.16 on the rear of my '40, there is a good 2 fingers width clearance inside the tyre, and, although it is close to the guard , there is never any rubbing, I'm not sure what the issue is , oh, wait , the '38 has a narrower deck ?? pulls the guards in , not enough room for the wides? (I built my deck 4ft wide) pic attached.
