Aluminum hub. Stainless steel brake rotor included. 7075 T6 aluminum sprocket included. NAK seals. O.E.M. bearings. Zinc-plated nyloc hardware. Complete wheel includes: Rim, spokes and nipples, hub, sprocket, brake rotor, seals, bearings, and all necessar Don't let Warp 9's prices fool you, they only use the highest grade stainless steels and aluminum available. As riders, they have seen that the current trend of off-road wheels is that they are priced too high for the working class guy and also do not come complete, adding to the additional cost and frustration. As riders, they decided to do something about it and Warp 9 was born. Anodized 7000 series aluminum rim. Stainless steel spokes and nipples.