Bottom bracket 68 mm. The steel cover of the bicycle inner bracket can absorb the roundness tolerance for the installation of the lower connections of the bracket. Suitable for a bottom bracket 68 mm housing.
Sealed and stable rotated: bottom bracket, no unusual noise, no gaps to prevent the mounting from getting stuck, safe for use.
5 size square hole BSA inner bearing: the 68 mm inner bearing fine workmanship, small dimensional error, precise 2-bearing thread design, which allows a better connection to the bicycle arm.
BSA integrated design: our bottom bracket bicycle integrated system can protect the frame, give off more power, so that the bearing rotates stably, it is better than normal bottom bracket.
Sealed cartridge bearing assembly: waterproof, dust bearing and storage shield design, which can help prevent erosion of sediment water.