Joined: Feb 2009
Posts: 85
Likes: 0
From: BC
Bikes: Nishiki Superbe, Marinoni Custom SL, Giant TCR Hybrid, Giant TCR 0 Team, Colnago Dream Plus, Trek 2000, Centurion Ironman Master. Giant Cypress-R CX, Kona Muni-Mula ("Colonel Mustard"), Giant TCR2, Giant Defy Alliance 0, Giant TCR Advanced SL 1 ISP
Mos6502 is right; first determine which part is binding. Assuming the brake caliper is okay, check for any burrs on the ends of the brake housings that were not cleaned up properly after the housings were cut - they will impede smooth motion of the cable. Also, check the overall condition of your brake cables & housing: any rust, worn housings, a crimp in the cable, or even sometimes a hidden broken cable strand will all affect the rear brake's performance.