U 663 A durable rim, available in many configurations, for reliable load carrying. This tough rim stands up to the high stresses of urban e-bikes, whose batteries allow you to cover long distances. Available in four different sizes: 20", 26", 27.5" and 29", to suit every configuration of modern city bikes. Finally, the reinforced rim profile supports a total system weight of up to 180 kg. Whether you're taking the kids to school or doing the shopping, you can do it all with this rim built to last!