Cycle Design Replacement Bottom Bracket Set Silver Shell Width 73mm/Shaft Length 113.5mm BB Set JIS Square Taper Sealed BearingReplacement bottom bracket set. Compatible frame standard: JIS Shell width 73mm Shaft length: 113. 5mm Compatible crank standard: Square taper Body: Steel Bearing: Sealed bearing A brand that always develops easy to use accessories from the user's perspective. Taking advantage of our base in Taiwan, the center of sports bike production, we offer products that support comfortable riding. Color: Silver Size: Shell width 73mm Shaft length 113. 5mm