ENVE SES 3.4C Tubeless Disc WheelsetA climbing wheel with an aero advantage, designed to be ridden in the mountains and optimized for use with modern disc brake road bikes. The ENVE SES 3. 4c TL Disc Wheelset is designed for road cyclists who require maximum versatility for riding in mountainous terrain and variable weather conditions. Since the introduction of the original SES 3. 4 Disc, weve implemented new design concepts across the SES lineup that result in a faster wheel and