Banjo
Fuelled with Jelly Babies
- Location
- South Wales
If they don't bed in properly you can also try this tip that works for both hydraulics and mechanicals.
Loosen the two bolts that lock the disc brake assembly to the frame / fork. Squeeze the brake lever. With the lever squeezed, tighten the two bolts to lock the assembly in place.
This procedure re-centers the pads on the rotor ensuring they are both equally spaced, and fixes the situation where the rotor catches either pad but not both.
LBS showed me how to realign the cable operated brake calipers on my Trek, exactly as "Howard" explained but first slip a thin bit of card such as a business card between the fixed pad and the disc.
When you release the brake this should leave a very small clearance gap between pad and rotor.