CeramicSpeed T47/68 External Campag UT 25mm Coated Bottom Bracket

CeramicSpeed T47/68 External Campag UT 25mm Coated Bottom Bracket T47 is a standard created by custom frame builders. It’s 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 those hardened-steel races for greater durability and less friction still.