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: Bolts directly onto bike, no custom parts needed Bolt-on billet hubs made for RSD Traction Flat Track Wheels only Captured wheel spacer design that retains spacer in bearing when installing wheel Fully sealed, maintenance-free, deep groove wheel bearings. Aluminum internal bearing spacers Gloss Black anodized finish All stainless steel hardware Closed course competition use only. Not for highway use Manufactured in California by Metal Parts