Why do brakes pulsate?
Brake pulsation (Amelia refers to it as “trebling”) is the result of a buildup of heat and friction in the brakes. If you experience this symptom, have the brake calipers checked to see if they are sticking after the brakes are applied, because this is a common cause of overheated rotors. The excess heat causes them to warp, resulting in “pedal pulsation.” Why does it seem to happen more after a long ride or going downhill? Because in both cases, more heat is being produced. What causes pedal pulsation? Typically, rust and corrosion build up on the brake caliper slides, and this causes the brake pads to stick in the applied position after releasing the pedal. The problem occurs more frequently in salt belt states because salts are used to keep roads clear of snow and ice, and salt dissolved in water forms a corrosive mixture. Amelia lives in the state of Washington where they use calcium chloride to clear roads during the winter months. Because the wheels, brakes and rotors are exposed
