Shimano BB-7700 Dura-Ace bottom bracket - 70 - 109mm Italian
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Precision engineered Dura-Ace 7700 bottom bracket for road Octalink splined system. 22 mm diameter chrome-moly hollow pipe billet axle reduces weight. Splined interface provides a more rigid crank assembly compared to tapered counterparts. Compound bearing structure - ball and needle bearings support the spindle to reduce flex. Maintenance-free sealed cartridge design prevents corrosion and is easy to install. Average weight 173 g.
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| Model Part Number | BB-7700i09 |
|---|---|
| Brand | SHIMANO |