Firmstrong Urban Boy Single Speed Beach Cruiser Bicycle 20-inch boy's single-speed cruiser bike great for introduction to relaxed riding Pedal-backwards coaster brake for easy pedaling and smooth braking White-wall balloon tires for a cushioned ride; front and rear fenders Oversized seat with dual springs for added comfort 13-inch frame sized for young riders from 3 feet, 2 inches to 4 feet, 4 inches tall