Well,,,Crap

Buying used tires is a crap shoot. Someone took them off their car for a reason. The balancing on the other hand ... they had some hack do that. In this day and age of computerized spin balance it is almost impossible to screw up. It tells you where to put the weights. I have balanced thousands of tires and the one thing I always do that I rarely see anyone else do is to re-spin them once the weights are on to be sure they balance to zero. Someone wasn't paying attention and you got to pay the price. I would be pissed too.