Shimano Tiagra BB-RS501 Bottom Bracket, English Threaded Cups

Shimano Tiagra BB-RS501 Bottom Bracket, English Threaded Cups

• Outboard Bottom bracket bearing cups for use with 2-piece cap-free design road chainsets

• Minimal bearing interface gives superbly smooth rolling

• Easy installation

• British thread (1.37X24)

• 68mm shell width

The Shimano Tiagra BB-RS501 Bottom Bracket uses a new seal construction for long-lasting performance.

The BB-RS501 Tiagra level bottom bracket is suitable for use with Shimano Hollowtech II chainsets with a 24mm spindle. The bottom bracket is compatible with English threaded road frames with a shell width of 68mm.