Polaris Wooly Bully Fat Tire Bicycle Frame/Fork: 18.5 inch Steel Diamond Frame with a Steel U-Bridge Ridged Fork Wheels/Tires: Aluminum Fat Black Rims with WD Hard Pack Fat 26 x 4.0 Tires Drivetrain: Single Speed with 170mm Crank Arms, Aluminum Pedals and KMC Z410 Chain Brakes/Cockpit: Aluminum 600mm Handlebar, Rear Coaster Brake and Front Promax Disc Brake, Promax Alloy Brake Levers, Promax Seat Post and Alloy Stem Includes: Neco Headset, Promax Quick Release Seat Post Clamp and Bolt-On Kryton Grips