Shimano’s sleek redesign for the Ultegra 6800 SM-BBR60 Bottom Bracket is lighter and faster than before, making it the ideal choice for either your English- or Italian-threaded frame. The new 6800 SM-BBR60 is close to 15 grams lighter than its predecessor, and the new design has reduced rotational friction by roughly 50%. This new silky-smooth ride is courtesy of steel bearings and Shimano’s advanced sealing technologies.
Specifications Model Number - FD-4703 Series - TIAGRA Cassette Compatibility - 10 Top Gear Teeth - 50T Maximum Capacity - 20T Chain Stay Angle - 63-66 Chain Line - 45...
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