I just mounted a pair of Firestone 155-70-15 radials for the front of my roadster on some new rebel 15 x4.5 wheels. I watched as the first tire was balanced and the tire was noticeably out of round. It took 4.5 ounces of weight to balance. I wasn't happy withe the out of round. We then checked the wheel and it was perfect. The next wheel and tire was also out of round and took 5.5 ounces. I called Speedway where I got the tires and was told that this much weight was well within their tolerances. I got the impression that the person I talked to really knew nothing about tolerances. I know bias ply tires usually need shaving but didn't think radials required it. Anyone out there have this problem?