Originally Posted by
David T
The plastic dust shield should not be a problem. It should not heat up from friction. If the metal core is turning in the dust shield it is because there is a problem "upstream" causing it to be hard to turn and eventually the plastic fails. reenforcing the dust shield only moves the "weak link" without fixing the problem. If you are having problems with the dust shield and you have a one piece cable, you probably have problems in the speedometer head or the angle drive. The other thing I have seen is that the inner core does not go deeply enough into the dust shield. If it is not deep enough it can turn in the square hole and round it out. Lubricate the angle drive and check the dust shield. Another thing I have seen is the whole dust shield is not captured tightly between the hub and the rim and it spins. Wrap the circumference with a little electrical tape.
David Teitelbaum