Rotor T4730 External Bottom Bracket - Steel - T47-68/70-30

The Rotor T47 bottom bracket is made of CNC-machined aluminum 7075 and features steel bearings as well as silicone seals. The T4730 model fits Rotor cranksets with 30 mm axle. In the External version, the bottom bracket is compatible with 68 mm road and 73 mm MTB frames. Weight: approx. 103 grams (manufacturer`s specs)