Key benefits Durable and practical: Made of material, this threaded bottom bracket is designed for longterm use. Improved sealing: Gutter Seal Technology provides significantly better sealing against the elements, leading to enhanced performance and longevity. Smooth and reliable operation: Sealed cartridge bearings deliver smooth rotation, reduce friction, and improve overall efficiency. Broad compatibility: Designed for bikes with an English/BSA 6873mm BBframe interface and a crankBB interface suitable for 29mm spindles, offering broad compatibility with various bicycle parts. Specifications and compatibility Type: Threaded bottom bracket Frame interface: English/BSA 6873mm Spindle compatibility: 29mm crank spindles Bearings: Sealed cartridge bearings Material: Made of material Use scenarios Scenario 1: Replacing a worn bottom bracket on road, mountain, or hybrid bikes that use a 29mm spindle crank to restore smooth pedaling and extend component life. Scenario 2: Restoring a commuter or touring bike with a 6873mm English/BSA shell to improve sealing against weather and dust while maintaining reliable performance across seasons. Scenario 3: Establishing or refreshing a or home setup where a versatile 29mmspindle, 6873mm bottom bracket is needed to support a range of frames and cranksets.