Signature Nathan Williams BMX cranks from United. United have been working on these for over two years and have undergone testing from Nathan and the rest of the United team as well as FEA testing at the factory to ensure they hold up. These cranks feature a 3-piece design with the ease of installation of a 2-piece with only one bolt required to tighten the arms down. Other features include smooth rounded edges at the bosses to reduce ankle bite, a ultra hollow 22mm heat treated spindle and theyre compatible with the Metro spline drive sprocket for LHD use. ###section### Product Specs Crank Type: 2pc Spindle Diameter: 22mm Includes BB: No Weight: 811g / 28.6oz ###shogun-image-section###