ENVE Composites SES 3.4 Rim - 700 Disc 24H Black - 3.4, Front, 39SES Rims are developed under consideration of airflow efficiency crosswind stability handling weight tire integration and much more. The result is a refined collection of rims that are purpose built to be best in class and provide the maximum speed and efficiency benefit available for their intended discipline application. Carbon fiber consctruction using continuously running fibers throughout the rim tapering laminates and removing excess material