I put new wheels on my bike today (along with new cassette, RD, and STI levers), and I'm noticing that the cassette sort of wobbles as the rear wheel spins while on the stand. I've seen this in other peoples' somewhat aged bikes, but these wheels are brand new (though admittedly factory-built Shimano 105 wheels - nothing grand).
I assume the freewheel body isn't on straight or something like that... (?)
Any ideas on how rectify this? Does it matter at all? (It doesn't seem to affect shifting at all, but it must introduce drag in the system...)