Ultegra 10-speed front derailleur compatible with 28.6 & 31.8 mm seat tube For use with 10-speed double chainset Extra wide pivot link increases rigidity for enhanced shifting response Lightweight & durable construction The polished & clear coated Ultegra finish resists corrosion & looks great Light action spring reduces effort required to actuate shifts Compatible with 10-speed drivetrains Maximum capacity of 15 teeth Weight: 103 grams for b&-on