The Warp 9 Complete Wheel Kit has everything you need to set up a rear wheel when you need a replacement or a spare setup for a paddle. A 7000 Series aluminum rim-with holes for rim locks-forms the backbone of the kit and is paired with a tough aluminum hub and wheel bearings. A 7075 T6 aluminum sprocket and a stainless steel brake rotor come attached but OEM sprockets and rotors can be easily swapped out if wanted. Stainless steel spokes and nipples keep everything tied together in a package that looks great and lasts. -Comes with 7075 T6 Aluminum 48 Tooth Sprocket and Nipple size is 6.7.