[Stealth 20" NOW comes with 3pc Crank. Please select the correct bike size. The 16-inch is a Kids BMX Bike for 3- to 3ft 6 inch. The 20-inch is for Teen and Adult BMX Bike for 4 to 5ft 10 inches. 20" Bike Tires: 20 x 2.4" - 16" Bike Tires 16x 2.4" STEM: Alloy (50 mm reach) top load - DRIVER: 9T PEGS: Pair Included]