Quote:
Originally Posted by szjalo
sorry for the late reply, pads are thin but not to a point to touch the indicator pin. I will replace pads as well as the hardware.
doubt the noise is from the pad being too thin, because that would be a continuous noise instead of occasional, right? The fact that my noise only come up under certain circumstance seem to imply something else?
I also notice noise will be completely gone for couple days after any rain. then came back after couple dry days. This reminds me my old bike, making rattle sound everywhere until it rains and noise goes away but came back after few dry days.
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When the pads are thin they lose the damping coefficient of the pad material. Track pads sing because the compound is much harder than street compound. At elevated temperature, when a street compound would already be smearing, track compound softens just enough to achieve maximum effectiveness.
After rain, the tiny voids in the material fill with rust just enough to damp the vibration. Then as they are used, that dust clears and "riiiiiing!" Your old worn drive chain did the same thing.
Also, because they are thin, the brake pots (pistons) are extended that much further from the cylinders. That also contributes to the ringing.