Shimano Bottoms from Amazon Marketplace

Wider bearing stance provides increased stiffness and efficienc... more

Wider bearing stance provides increased stiffness and efficiency. Compatible with Dura-Ace, Ultegra and 105 10 speed cranksets. Oversized bearings for added stiffness and strength. Easy installation, adjustability and maintenance. less

Bearing cups only for the Shimano Ultegra 10 speed outboard - b... more

Bearing cups only for the Shimano Ultegra 10 speed outboard - bearing crank/BB combo . less

The Shimano 105 BB-5500 series bottom brackets have an Octalink... more

The Shimano 105 BB-5500 series bottom brackets have an Octalink V1 type spindle interface for use with Octalink cranks. 105 BB-5500 68x109.5mm English V1 Spline BB for double 105 BB-5503 68x118.5mm English V1 Spline BB for Triple cranks less

Multi-Bearing Construction:Bo­ttom bracket uses both ball and ne... more

Multi-Bearing Construction:Bo­ttom bracket uses both ball and needle bearings to reduce flex for greater power transmission efficiencyPipe Billet BB Spindle:Reduces weight and increases strengthSplined Interface:8-spl­ine interface between BB and crank arm forms a highly rigid connectionWeigh­t: 173 GramsFor double chain ring use less

Required for the new FC7800 Crankset. Specify threading: Englis... more

Required for the new FC7800 Crankset. Specify threading: English, or Italian. less

Brand: ShimanoModel: LXModel Number: BB-UN53Weight: 330 GramsTh... more

Brand: ShimanoModel: LXModel Number: BB-UN53Weight: 330 GramsThread: EnglishUsage: MountainBearing­s: SealedSpindle : Taper: SplinedMaterial­: Steel less

Wider bearing stance provides increased stiffness and efficienc... more

Wider bearing stance provides increased stiffness and efficiency. Compatible with Dura-Ace, Ultegra and 105 10 speed cranksets. Oversized bearings for added stiffness and strength. Easy installation, adjustability and maintenance. less

Bearing cups only for the Shimano Ultegra 10 speed outboard - b... more

Bearing cups only for the Shimano Ultegra 10 speed outboard - bearing crank/BB combo . less

Replacement bottom bracket for Ultegra FC-6601 crankset. Outboa... more

Replacement bottom bracket for Ultegra FC-6601 crankset. Outboard bearings provide good stability. Hollowtech II provides optimum balance of light weight and rigidity. Minimal bearing interface ensures smooth rolling action. less

Required f the FC-6600 and FC-6603 Ultegra 10 Speed Cranks. Spe... more

Required f the FC-6600 and FC-6603 Ultegra 10 Speed Cranks. Specify Threading: English or Italian. less