Enviolo hubs use the NuVinci planetary transmission to provide stepless shifting and near silent operation. Shift at any time- while pedaling, coasting or while stopped. Enviolo hubs are designed to withstand the high torque of an eBike while being visually maintenance-free. The City 2 hub is engineered for heavier loads over shorter distances with or without Ebike motors. Rated for 75Nm nominal torque. 310% Ratio Range 9-spline freewheel for threaded lockring 44T spline Hub Interface I.S. 6-hole discbrake, Max 180mm rotor Specifications Rear Axle10x1 Threaded x 135mmCassette Body TypeSingle Cog DriverColorBlackSpoke InterfaceJ-BendDefined ColorBlackHub Drilling36Hub/Brake Compatibility6-Bolt Disc