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Shimano BB-R9100 Dura-Ace Bottom Brackets
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• Shimano BB-R9100 Dura-Ace Bottom Brackets
• Bottom bracket with small ball bearings for lightweight
• Advanced seal construction for smoother rotation
• Available in English (BSA) or Italian threading
• BB Shell Width: 68mm/70mm
• Average Weight: 65g
In 1971, a group of climbers, skiers, and outdoor enthusiasts established/founded Oregon Mountain Community (OMCgear) in Portland, Oregon.
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