Racing Zero Carbon CMPTZ DB wheels set the benchmark for style and performance, balanced with high quality materials and design. - 30 mm high-profile unidirectional carbon rim with ARC TECHNOLOGY reinforcements at the most critical points wthin the wheel - 19 mm internal width and 2-Way Fit(TM) technology for clincher or tubeless set ups - CULT bearings for unparalleled smoothness and reduced weight - 2:1 spoke ratio with disc brake hubs