i got a new set last week . O.K. , put new rubber on them today . small problem , i have rear drums . they did not seat on rear axles . took my die grinder with a sanding drum , a few circle passes on the center hole , problem solved . ( yes i did all 4 ) don't know if this is a common problem as i know many people are getting ZQ8 rims , i thought i'd throw this out . i would recommend , doing this from the backside of the rim with with a sanding drum , not a die grinder . no balance problems , took it up to 100+ , solid as a rock . i'm happy .