Characteristics and Interoperability High rebound polyurethane is used to make wheels, giving them exceptional strength and longevity. The rider can easily steer and make turns thanks to the comfortable TPR handlebar grips. mounted on ABEC 5 bearings are two 121mm front wheels and one 80mm rear wheel. Sky blue in color Dimensions: 22.8 x 11 x 31 inches (L x W x H).