Lighter than the Metron 90, but still extremely aerodynamic. The 50mm deep section is the choice of professional Teams around the World. These wheels are designed with Low Drag Construction with all the wheel components are specifically designed to reduce drag. This allows riders to achieve maximum speed with minimum pedaling effort. Reduced distance between the hub flanges, aero spokes & special rim profiles are the key point. They also feature Visions ABS nipples, one of the reasons why wheels come out of true is due spoke nipples getting loose. Nipple ABS has special self-locking nipples to prevent spokes from loosening, assuring wheel trueness & the highest reliability.