Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
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I suspect the brake is adjusted super close on one side, and very slight movement is causing rubbing. It's also possible that the entire caliper unit is loose on the fork and moving a bit on bumps --- check this, it's important.
If the caliper is mounted securely and correctly then it's an adjustment issue, and the procedure varies withy the specific brake. Search for that info by brand and model, and follow the instructions for centering and adjusting the caliper.
An ounce of diagnosis is worth a pound of cure.
“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin
“One accurate measurement is worth a thousand expert opinions”
- Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance