Get your kids in on the fatbike fun with the Specialized Fatboy 20. It features a lightweight aluminum frame with gigantic 4.0-inch wide Ground Control tires to devour everything in your path. The super-wide 20-inch aluminum rims have the stability and durability to roll through rocky, root-filled trails with an ease that promises confidence and fun. SRAM's got drivetrain duties covered with a quick-shifting X4 drivetrain. And, powerful Tektro Aires mechanical disc brakes deliver solid stopping power. Trail? Sand? Snow? The Fatboy 20 owns it all.