Niner Bio-Centric EBB - Black

The Niner Bio-Centric EBB ia an eccentric bottom bracket designed for use with Niner EBB frames. The offset opening allows chain tension adjustment by simply rotating the bottom bracket. Run a single speed setup without a tensior, or adjust the geometry of your bottom bracket and chainstay.

FEATURES

• Lightweight alloy construction
• Fits only BB shells with a 55mm diameter and 68mm width