RSD race proven 8 lug hub sets are made for the RSD Traction Flat Track wheels made specifically to fit popular 450cc Dirt Bikes from KTM, Husqvarna, Kawasaki, Yamaha, Honda & Suzuki. They are finely machined for accuracy and weight reduction matching the 8 lug hub pattern of the wheel itself. RSD Traction flat track race wheels are built for the racetrack to provide a lightweight, strong wheel that can survive the wide variety of tracks and surfaces you may encounter. Wheels sold separately are available in 19 x 2.25, 19 x 2.40, 19 x 2.75 and 3.0, with a variety of sizes to allow the necessary tweaks in rim width to get your machine to work the way you want. Features: Bolt-on billet hubs designed for RSD Traction or PM standard (non DTX) flat track wheels only Direct bolt-on for all popular 450cc motocross models (no custom parts or modification required) Accepts stock MX front brake rotor Captured wheel spacer design retains spacers in bearings when removing and installing wheel Fully sealed, maintenance-free, deep groove wheel bearings Aluminum internal bearing spacer Gloss Black anodized finish Stainless steel hardware included Closed course competition use only. Not for highway use. Manufactured in California by RSD