SHIMANO DURA ACE BB-7700 BOTTOM BRACKET

Dura-Ace was designed to give road racing cyclists a performance advantage by reducing bicycle-induced stresses during competition. Choose the BB-7700 for double cranksets, or the BB-7703 for a triple crank setup.Multi-Bearing Construction: uses both ball and needle bearings to reduce flex for greater power transmission efficiency. Material: Hollow chromoly splined spindle with alloy non-drive side cup Weight: 173 grams Compatibility: V-1, 8 spline spindle for Shimano road cranks only Two Sizes: 109.5 Spindle for double cranks: 118 for triple cranks