Race Face Bottom Brackets (BB ISIS SRX)
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- CNC machined, heat treated, hollow chromoly M15 spindle.
- Shot peened finish for fatigue strength.
- Forged & CNC'd aluminum cups & reinforcing sleeve.
- Single row, full-ball, sealed cartridge bearings.
- Low friction labyrinth spindle seal keeps out contaminants & increases bearing life.
- Newly improved extreme conditions bearing grease.
- 64 ball bearings in each bottom bracket.
- Fixed cup spacer (2.5mm) allows BB to be used with either 68 or 73mm shells.
- Fixed cup on drive side.
- Proprietary non-side loading design.