JPSouth
Well-Known Member
Considering swapping the 12R/22.5 steer gear on my 1998 Peterbilt 378 to 315/80R22.5. Best as I can figure, I need to get a couple of 22.5 x 9" flat-face offset rims, mine happen to be stud-piloted Budds. With the present tires, I have a good 1"- 1 1/4" spacing from the inner sidewall to the steering box pitman arm at full right turn against the stops.
Wondered if anyone had done this swap and wound up with clearance problems with the 315s. Tread width on 315s seems to vary from brand to brand, the ones I'm looking at are about an inch wider with a more square shoulder profile. My tire guy's opinion is that the flat face rims will offset the 315s outboard an inch or two which should more than compensate for the added tire width.
Wondered if anyone had done this swap and wound up with clearance problems with the 315s. Tread width on 315s seems to vary from brand to brand, the ones I'm looking at are about an inch wider with a more square shoulder profile. My tire guy's opinion is that the flat face rims will offset the 315s outboard an inch or two which should more than compensate for the added tire width.