YOELEO Road Bike Wheels SAT C38 STD Clincher Carbon 700C Bicycle Wheelset for Training and Racing (Black Glossy, 25mm Wide) Special Assembly Technology (SAT) increases 30% wheels strength and 10% inflation capacity, providings better durability & braking performance Braking Surface Technology(high temperature resin+1K carbon) provides better heat-insulation qualities and high thermal durability,best brake effect and longer braking lifetime Hand built setup gives stiffest wheels condition and lasting performance, fit for both training and racing Novatec hubs offers smooth and fast rolling; Wider U shaped carbon wheels achieve best performance in crosswinds and cornering YOELEO Carbon Wheels meet EN Standard (SGS TEST No.:GZHG1501000192BC),with 1 year warranty guarantee under normal usage