Arlen Ness Spider 320mm Brake Rotor Adapter For Harley The Arlen Ness Spider 320mm Brake Rotor Adapter facilitates the attachment of factory touring model front brake rotors (Spoke Mounted) to custom wheels, offering an efficient solution for customization enthusiasts. Features: CNC Machined from solid billet aluminum Accepts factory touring front floating rotor bolts & 320mm spoke mount brake rotors (factory & aftermarket) Rotor adapter mounts to standard 5-bolt HD type wheels w/3.25 bolt circle Available anodized or chrome finish Sold individually