The best balance of low frontal drag and crosswind stability the 45mm deep 25mm wide rim with integrated tyre design creates an aerodynamic wheel that inspires confidence in crosswinds perfect efficiency and low weight 17mm internal rim width offers low rolling resistance with 25mm tyres giving you low friction and fast engagement lateral stiffness and reliability 12k carbon flanges with high lateral stiffness giving you low friction and fast engagement griplink griplink tyres are optimize