- Invader kart rear brake hub (sprocket hub) .
- Designed to fit 40mm axles (inner race is 40mm ID).
- Ideal for Invader kart, but will fit many Righetti brake hub applications.
- Milled aluminum hub, with 6 mounting points for rear brake rotor.
- Included cinch bolt to affix hub to axle.
- Available in black, with anodized finish.