Rim Material: carbon Wheel Size: 700c Rim Type: Hooked Rim Depth: 50mm Rim Width: [internal] 21mm, [external] 28mm With the Shimano Ultegra WH-R8170 C50 Carbon Road Wheelset it's easy to get that sweet spot between aerodynamics and lightweight performance. The 50mm depth means this wheel cuts through the wind when we're going fast but doesn't hold us back when the grades get steep. Bladed spokes add to the aero advantage and carbon rim construction keeps the weight down and stiffness up.