ENVE Composites SES AR Drop Handlebar - Integrated Compact 46/51cm 31.8 Clamp BLKENVE Composites SES AR Drop Handlebar Integrated Compact 46 51cm 31. 8 Clamp Black. The SES AR handlebar handlebars features an aero cross section peloton friendly flared drops and a carbon laminate optimized to smooth out even the roughest roads. Additionally it allows the user to route wires hoses internally when paired with compatible stem headset combo or externally with any traditional stem and headset equipped bike. Hidden wire hose routing