shimano,BB-UN55 Square Spindle Bottom BracketsFits JIS Square-Taper CranksetsHollow spindleCrankarm fixing bolts not includedItem SpecificationsWeight330BB/Frame InterfaceEnglishSpindle Interface TypeSquare Taper JISBB Shell Width73Defined ColorSilverBottom Bracket Shell I.D.1.37"Spindle Length113
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