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Item # SHI0374

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Item # SHI0374


The Shimano Dura-Ace BB-7900 Bottom Bracket is simple and straightforward. It includes two cups with low-drag, high-precision Dura-Ace bearings, plus a cylindrical dust cover that mates the two cups. Shimano designed new bearing seals that reduce drag—to create smoother rotation and add durability.

Tech Specs

Claimed Weight:
90 g
English, Italian
Shell Width:
(English) 68 mm, (Italian) 70 mm
alloy, plastic
Recommended Use:
road cycling
Manufacturer Warranty:
3 year

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Shimano Dura Ace 7900 Bottom Bracket

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