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