Bike Bottom Brackets

Bike Bottom Brackets at Swinnerton Cycles

A smooth, creak-free bottom bracket is the foundation of an efficient drivetrain. Our bike bottom brackets collection at Swinnerton Cycles covers threaded BSA, press-fit, T47, and BB30 standards for road, MTB, and gravel applications. Bottom bracket standards have proliferated significantly in recent years — and choosing the correct standard for your frame and crankset is essential. We stock bottom brackets from Shimano, Hope, and other leading brands, covering sealed cartridge, external bearing, and press-fit designs. Browse our full Drivetrain range and explore Cranks and Bottom Bracket Tools.

Popular Bottom Brackets

• Shimano UN300 BS Bottom Bracket Sealed Cartridge
• Hope T47 Bottom Bracket Spacer 1mm
• Shimano Ultegra BB-R60 Bottom Bracket