Williams designed the Summit 26 XC to be lightweight while still maintaining outstanding durability. The ultra lightweight alloy rims keep rotating mass to a minimum, allowing the wheels to accelerate and handle with precision. To maximize durability while maintaining a low weight, the Summit 26er utilizes a 32 hole rim with alloy eyelets front and rear. The wheels are laced with lightweight and super strong Sapim Laser spokes. The Summit 26 XC is a fantastic all around XC wheel strong enough for everyday riding and light enough for race day. For use with disc brakes only, six bolt ISO rotors. The front hub is compatible with quick release, 9mm or 15mm thru-axle forks using the adapters (not included). The rear hub is compatible with standard quick release frames (10x135mm) and can be converted for 12x 135mm thru-axle or 12x142mm thru-axle frames using a separate conversion kit (not included). End cap conversion kit (sold separately): 9mm and 15mm front end caps for use with thru axles. 12x135mm and 12x142mm rear end caps for use with thru axles. Wheel set comes with: Front Wheel Rear Wheel 2 Molded rim strips with integrated valve 1 Roll of universal kit tape 2 Universal kit valves Quick release skewers.