I got a 2nd hand RQ from a mate, it's pretty much new but I've got an odd problem. I can't get it to run true. It's bouncing up and down and sideways. I've tried the soap trick, high pressure, low pressure, bouncing, pulling/pushing the tyre into the rim and nothing seems to help. It's pretty bad, it keeps rubbing against the chainstay yoke. Any other ideas? Or is it safe to say that the German who made my tyre was drunk that day?