Advanced functions for sport and fitness riders. Tiagra shares the engineering lineage of Dura-Ace & Ultegra but has its own unique identity,offering greatly enhanced feel and sleek design that's backed by a new level of performance.,10-speed compact model compatible with standard,front,derailleur (compact derailleur not required) Hyperdrive SG-X chainrings 2-piece construction Anodized surface treatment Color: Silver Spindle Interface Type: Hollowtech II Pedal Spindle: 9/16" Chainring BCD:,110mm Arm Leng...
