Triangulated design features a center ring connecting each spoke, each wheel ring is specially located for optimum strength & to be visually hidden when installed on the motorcycleAccepts all standard HD hub mount rotors, Ness rotor adapters are a recommended optionExtensive R&D for overall lightweight profile with optimum strengthPrecision CNC machined from radial forged 6061-T6 aluminumRim only, hub must also be purchased for a complete assembly5-spoke wheel with high level CNC machined detailSuperior radial and lateral runout accuracyMust use Arlen Ness hub kit.