Bottom Bracket

Converts a 68mm American style bottom bracket to take a 3 piece 19mm spindle crank Bearings included Shell: 68mm Interface: American Spindle Type: 19mm Cup Material: Alloy Blk Color: Black

One-piece bottom bracket cup set Bearings included Shell: 68mm Interface: 28 tpi Spindle Type: OPC Cup Material: Steel Sil Weight: 265g Cup Type: Press Fit Cup OD/Bearing OD: 51mm

One-piece bottom bracket cup set Bearings included Shell: 68mm Interface: 24 tpi Spindle Type: OPC Cup Material: Steel Sil Weight: 265g Cup Type: Press Fit Cup OD/Bearing OD: 51mm LINKS Manual BB003

Alloy shell Alloy cups Chromoly spindle Sealed bearings Shell: 68mm Interface: ENG Spindle Type: SQR JIS Length: 115mm Cup Material: Alloy Weight: 290-300g Report incorrect product information

One-piece bottom bracket cup set Bearings included Fits smaller american juvenile/youth sized BB Shell: 65mm (Small) Interface: 24 tpi Spindle Type: OPC Cup Material: Steel Sil Weight: 173g Cup Type: Press Fit Cup OD/Bearing OD: 43mm

Forged and CNC machined AL6061 thread-in cups for a superior fit and noise-free operation Low-friction dual seals protect the bearings from harmful contaminants Sealed premium bearings are both serviceable and replaceable

Shimano BB-UN300 Square Spindle Bottom Brackets Fits JIS square-taper cranksets Crankarm fixing bolts sold separately Hollow spindle