Originally Posted by GeezyRider

I think that it has also been said on these forums that disc brakes (or is it breaks?) used with quick release hubs can cause life threatening situations.

Originally Posted by terrymorse

Hmm.

I assume the failure mode is an axle pulling down out of dropouts. Obviously not a problem for the front axle, held in the dropouts with safety tabs.

But the rear axle? It seems that the braking force from a caliper on the seat stay wants to push the axle upwards, holding it into the vertical dropout. I don't see how that force could make the axle want to move downwards and out of the dropout.