/forums/images/graemlins/k5.gif I have a 1988 k5 Blazer and have 15x12 inch alloy wheels with 3.625 back spacing on it right now. I am replacing them with a steel wheel from Pro Comp, Rock Crawler series. The backspacing they told me would work is really close to my Tie Rod, about .375 in. from the wheel bead. The new Wheels are 15x8 with a 3.75 back spacing. The Pro Comp factory said they could make a wheel at 3.5 back spacing. Or go to a 2.75 back spacing. I running 35 x 12.5 x 15 BFG's AT. I don't want to run into problems with stress on the wheel bearings and hub with the 2.75 backspacing like I did with the 15x12. Does anyone have any suggestions on what backspacing to go with 3.5 or 2.75.