Old 07-27-17, 06:29 PM
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Mark42
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Join Date: May 2017
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Bikes: Nothing a Bike Weenie would ride.

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Squeeling rear disc brake..... grrrrrr....

The bike has bb5 calipers front and rear. The front is a 203 mm disc, the rear is a 160 disc. Both calipers have the stock "red" brake pads, which I believe are the semi-metalic pads. The front made a lot of noise until the caliper was shimmed up a bit to the point that the pad was not rubbing the spokes of the disc. Then it was quiet, and just made that unnerving metal on metal sound. But stopping was amazing. Tried shimming up the rear caliper with no change. Swapped front and rear calipers, no change. Re adjusted the rear caliper to the point where the disc barely moves when the brakes are applied, no change. I finally got tired of screwing around with the caliper and just ordered a set of organics for the rear. Now its dead quiet.

What is it about semi-metalic pads that make such a racket? And why do metalics make that god awful grinding sound? Cant manufactures make metalics that are quiet?
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