Billet hub set for GSR models to run pocketbike style rims and tires. Front hub and rear adaptor have 6 bolt IS pattern for mountain bike style brake rotors. The rear sprocket mounts using the same holes as the stock wheel, allowing you to use any of the GSR rear sprocket sizes. Includes front and rear hubs, sprocket to rotor adaptor, bearings, center spacers, axle spacers, and hardware. These have an anodized finish and they CANNOT be polished. We do offer a raw machine finished version that you can polish yourself, please see our other link below under related products.