CeramicSpeed T47/68 Bottom Bracket for Shimano Standard Bearing Bike Accessories_Computer Mounts the frameset is compatible with

the frameset is compatible with both mechanical and electronic shifting systems

216 Gram Weight (Size 38

the Tiagra components ensure efficient power transfer and responsive performance

you can track and record performance data without extra external sensors

A6-SL Super-Butted Aluminum

CeramicSpeed T47/68 Bottom Bracket for Shimano Standard Bearing Bike Accessories_Computer Mounts the frameset is compatible withT47 is a standard created by custom frame builders. Its threaded, has an inner diameter of 47mm, and is 68mm wide. It has the design benefits of being oversized and wide, but also the practical benefits of threads. The cups have CeramicSpeed bearings pressed in. There are two bearing options. The Standard Bearing has CeramicSpeed Balls and hardened steel races. The Coated Bearing has the same balls running on a 3 micron thick coating placed on top of