Campagnolo Spacer Hub FH-BO021

The Campagnolo FH-BO021 is a compact spacer washer designed for use within compatible Campagnolo rear-hub axle assemblies, including select Bora, Shamal, Eurus, Zonda, Neutron, and Hyperon wheel generations. It is essential to replace this washer if the original is missing, deformed, corroded, or damaged during hub servicing, as improper spacing can impact the alignment of the axle hardware and bearing adjustment. Ensure compatibility by verifying the wheel’s exact model year and referring to the exploded spare-parts diagram, as similarly named Campagnolo wheels have featured different axle and hub designs over the years. Installing the washer necessitates the removal of the relevant axle hardware in the correct order, followed by proper cone adjustment and a confirmation that the hub rotates smoothly without bearing play.

- Rear-hub axle spacer washer
- Compatible with select Campagnolo Bora, Shamal, Eurus, Zonda, Neutron, and Hyperon rear hubs
- Also utilized on certain older Vento, Nucleon, and Electron rear-hub assemblies
- Replacement for a missing, damaged, or deformed original washer
- Exact wheel generation and hub diagram must be verified before ordering
- Correct bearing adjustment is required after installation

Specifications
Brand: Campagnolo
Model: FH-BO021
Type: Spacer washer
Installation position: Rear hub axle
Quantity: 1
Color: Silver