Kawasaki Sumo Fat Tire Bike, 26 x 4 inch Wheels, 18.5 inch Frame, Unisex Frame/Fork: 18.5 inch Aluminum Diamond Frame with a U-Bridge Ridged Fork Wheels/Tires: Aluminum Fat Black Rims with WD Hard Pack Fat 26 x 4.0 Tires Drivetrain: 21 Speed Shimano EF-51 Trigger Shifters and Derailleurs and Cassette with 170mm Aluminum Crank Arms, Nylon Pedals and KMC Z50 Chain Brakes/Cockpit: Aluminum 600mm Handlebar, Front/Rear Promax Disc Brakes & Brake Levers, WTB Rocket V MTB Saddle, Promax Seat Post and Alloy Stem Includes: Neco Headset, Promax Quick Release Seat Post Clamp and Bolt-On Kryton Grips