Rim Material: carbon Wheel Size: 700c Rim Type: Hooked Rim Depth: 36mm Rim Width: [inner] 21mm, [outer] 28mm Meant for gliding up climbs we fit the lightweight Shimano Ultegra WH-R8170 C36 Carbon Road Wheelset to our disc road bikes. The 36mm depth rim does more to cut through wind than our training wheels while the carbon construction easily supports tires up to 38mm in width.