The Dura-Ace bottom brackets are the fastest and smoothest in the Shimnano Octolink Bottom Bracket line-up, designed for the Track racer in mind.
BB-7700 (unsealed)
- Unsealed bearings
- Suitable for Indoor track racing (and outdoor in fair weather)
- Requires yearly maintenance
- Requires pre-load adjustment for correct setup – We recommend a skilled mechanic
- Fast Rolling
- Can be re-built and overhauled by a skilled mechanic
- Weight: 173g
Specifications:
- Bottom bracket: BSA Threaded (1.37" x 24tpi)
- Shell width: 68-69mm
- Axle length: 109.5mm
- Axle type: Steel
- Spindle system: Octalink