03-03-13, 10:42 AM
A worn sprocket shouldn't cause a problem for a new chain... at least, not in that distance. (A knackered chain will wear a new sprocket quite fast though.)
As for shifting the nut, screwlock compounds often seem to get tougher with age. I've had to use far more force than I'd expected a couple of times and the "crack" when it finally lets go is quite alarming. If you've a butane torch, heating the nut quickly up to 100ºC should weaken the compound enough to make the job easier.
As for shifting the nut, screwlock compounds often seem to get tougher with age. I've had to use far more force than I'd expected a couple of times and the "crack" when it finally lets go is quite alarming. If you've a butane torch, heating the nut quickly up to 100ºC should weaken the compound enough to make the job easier.