hi all, wondering if you might have any experience with this...
lately I notice when I apply hard backpressure while slowing, or hard forward-pressure while accelerating, my rear tire rubs against the fender or the rear brake pad. It happened just now and I presumed it was moving in the dropouts, but then I got home and checked the axle nuts and they were tight.
I am running a pretty low gear (~60") which means I can apply a lot of force in both directions. Trek conversion with horizontal dropouts, and, alas, no chain tensioner.
whaddya think? Frame flex? Wheel flex? (!!?) Or it slips in the dropouts even though it's tight?
bianchi pista workhorse, cannondale r1000, mountain bike fixed conversion
i had this problem with an old road bike that didn't have a QR rear wheel. i hadn't tightened the bolts properly and the force of the chain was pulling the wheel forward on the right side, so that it rubbed on the left fork.
does that make sense? i think i said it how i wanted to...i think i'm getting sick again...
i poked around...frame and axle are solid. seems to be frame flex, exacerbated by the fact that I could use another link in my chain (ha ha) to keep the wheel a little back from the fender. Plus I just gotta cool out on the mega torque! Dude! Mel-low.
could be loose bearing cones, causing a slight amount of hub play as well.
i second that, if you say that the bolts are on tight it's probably the cones being too loose. i can't think of anything else, i don't think the spokes being under tensioned would be too much of a problem.