Hub kit mounts to your Arlen Ness forged rims in minutes with basic tools offering excellent flexibility for stock and custom applications. Proprietary billet aluminum wheel hub kit is designed and engineered exclusively for our Arlen Ness forged aluminum wheels (sold separately). Cartridge design hub features both wheel bearings pre-set in one hub for optimum radial and lateral run out accuracy. Lightweight coped design provides form and function. Accept factory or aftermarket hub mounted 5-bolt hub mounted rotors (3.25″ bolt circle)..