Shimano Bottom BracketSHIMANO XTR Bottom Bracket Threaded HOLLOWTECH II 68 73 mm shell width With smooth rotation and better sealing performance, the SHIMANO XTR bottom bracket is durable for mountain bike usage. It is available in threaded and press fit options. MODEL NO SM BB93 SERIES XTR M9000 Series Average weight 73 HOLLOWTECH II bottom bracket_Threaded bottom bracket type Small ball bearing Threaded bottom bracket shell width (mm)_68 Threaded bottom bracket shell
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