##Shimano WH-RX570 GRX Tubeless Disc Clincher Rear Wheel Shimano’s WH-RX570 GRX Tubeless Disc Clincher Rear Wheel has been carefully designed for the very specific demands of drop bar off-road riding. The rim has an internal width of 21.6mm to provide good support for tyres of between 32-42mm wide as well as a 22mm height with a nod to aerodynamics. 24 straight-pull, bladed spokes connect the rim to the hub with enough stiffness for efficiency but still sufficient compliance for comfort on unpaved tracks and trails. The hubs use Shimano’s trademark cup-and-cone bearings which allow for easy maintenance at home or even when out in the back of beyond. These bearings are protected from mud and water by Labyrinth and contact seals to keep them running smoothly in all conditions and the Center Lock interface provides a secure platform for the disc rotors. Either Shimano or SRAM 10/11-speed cassettes can be used on the Hyperglide compatible freehub.