Originally Posted by
prathmann
Another possibility is that the axle is marginally too long. If it extends out to the outer surface of the dropout then no matter how tight you make the QR it won't be properly fastened on the dropout but most of the force is instead just squeezing the axle.
this is true and probably your root cause. but don't forget that if you dropouts are sprung out a bit, the axle may STILL not protrude beyond the dropout when the wheel is just stuck in there, but before tightening the QR.
one way to make sure is to measure the width of your dropouts (NOT the distance between them
) and the distance the axle extends beyond the lock-nuts (or bearing retainer or whatever is on there that is supposed to bump up against the inside of the dropout when the QR tightens down). don't forget that the axle may not be centered within the hub. good luck.