Shimano UN3000 Square Taper English Bottom Bracket (68 x 122.5mm) 50mm ChainlineFeatures:Fits JIS square-taper cranksetsCrankarm fixing bolts sold separatelyHollow spindle50mm chainlineSpecifications:Frame Interface: BSA/English ThreadedSpindle Interface: Square Taper JISBottom Bracket Shell ID: 1.37Shell Width: 68mmSpindle Lengths: 122.5mmColor: Silver