Shimano Hollowtech II Threaded Bottom Bracket SM-BB93 – 68/73 mm (BSA)
Designed for durability and smooth performance, the Shimano SM-BB93 XTR series bottom bracket features improved sealing compared to road models such as the BB-R9100 (Dura-Ace), SM-BBR60 (Ultegra) and BB-RS500 (105/Tiagra). Its robust construction helps keep dirt and moisture out, ensuring long-lasting performance in all riding conditions.
Features
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Genuine Shimano Hollowtech II bottom bracket assembly
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Includes left and right cups, spacers, inner sleeve, and O-rings
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Enhanced sealing for superior protection against water and debris
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Lightweight seal structure helps reduce unnecessary grams
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Sealed bearing design for smooth, low-maintenance performance
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Maintenance-free operation
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Compatible with Road, Gravel, and Mountain bikes using 24 mm Hollowtech II crank spindles
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Fits 68 mm and 73 mm BSA threaded bottom bracket shells
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Durable black anodized finish
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Simple installation and removal
Installation
Use Shimano TL-FC34 or TL-FC24 bottom bracket tools in conjunction with the TL-FC36 adapter.
