[onewhippedpuppy]

My local Firestone store is basically my sole source for tires, they never have any vibration from spin balancing. I talked to their manager about the RFB, which they offer for an extra fee. His explanation was that a good shop should only need RFB for bent wheels or poor quality tires because the tool can account for those imperfections. Per him, a good shop should be able to mount good tires on true wheels without a problem.