The brakes on my Quest were squealing. This seems a common curse of disk brakes. I once had a bike where the squealing became shrieking and I became reluctant to use the brakes at all. This was not good. After much googling and experimenting I have two solutions that work.
The first is to attach a small but weighty object to the body of the brake mechanism. I used a socket from a socket set and attached it with a plastic zip tie. However this looks odd and adds weight.
The other solution is to round off the edges of the holes in the disc's braking surface. Run your fingers over both sides of the disc and you will find that one side has sharper edges to the holes. Only this side needs to be done. This seems usually to be the side of the disc without writing on it. Now take a small, flat, fine-toothed file and, working your way round the disc, round off all the corners of the holes in the braking surface. It is a pain to do as the file is reluctant to move over the sharp edges of the hardened steel but the quieting effect lasts for months or longer.
Its a shame that the manufacturers have not sorted the problem themselves.
The first is to attach a small but weighty object to the body of the brake mechanism. I used a socket from a socket set and attached it with a plastic zip tie. However this looks odd and adds weight.
The other solution is to round off the edges of the holes in the disc's braking surface. Run your fingers over both sides of the disc and you will find that one side has sharper edges to the holes. Only this side needs to be done. This seems usually to be the side of the disc without writing on it. Now take a small, flat, fine-toothed file and, working your way round the disc, round off all the corners of the holes in the braking surface. It is a pain to do as the file is reluctant to move over the sharp edges of the hardened steel but the quieting effect lasts for months or longer.
Its a shame that the manufacturers have not sorted the problem themselves.
