Yes. The spreader bars for oem 10 x 1.75 brakes on the 8.75 diff has a thinner spreader bar to prevent this. Those aftermarket spreader bars appear half as thick as the originals
The bars I received from Mckellars Modified Rides are .186" thick and appear to be well made pieces. They gave great service, shipped fast, and packaged well. I'd buy from them again!