20" Inches Wheel Skid Proof Tread Pattern Unicycle W/ Stand Uni-Cycle Bike Cycling RED 20" wheel (20" x 1.75" Tire) Frame: Excellent Manganese Steel, Standard Frame of Unicycle Crank arms: WHEEL TOP Crank, International Quality Outer Tire: Excelletn Skid Proof Mountain Tire Bearing: Heavy Manganese Steel Mute Bearing