Bring a new level of control and security to your gravel and road rides with the Grail S1 wheelset. The same patented BST-R tubeless rim design found in our original Grail rim is now available at a more affordable price. Compatible with tubeless road tires, low-pressure tubeless converted tires, and conventional tires and tubes, the Grail S1 rim offers total versatility. The Grail S1 wheelset combines durable 6061 aluminum rim construction with our stronger, smoother rolling Neo hub with Durasync triple-bearing freehub. With the security of the best tubeless system in the business and a wider overall internal rim width for improved stability and control, the Grail S1 gives your road or gravel bike an edge on every ride.S1 wheelsets do not come with valves and include only one set of endcaps.For gravel, road, and cyclocross,Bead Socket Technology (BST-R) compatible with wider pressure range,Neo hubs roll smoother longer,Patented rim shape offers easier more tire stability and easier tubeless setup,Compatible with Shimano 9, 10, and 11-speed cassettes,Compatible with road tubeless-specific clinchers and conventional clinchers when used with tubes,2 layers of 21mm yellow tape installed.