Profile Design DRV/AEROa Drop Handlebar - 42cm 136mm Drop 75mm Reach 31.8mm BLKProfile Design DRV AEROa Road Drop Handlebar 42cm 135mm Drop 148mm Reach 31. 8mm Black. The Profile Desgin DRV AEROa is a high performance aluminum aero drop bar featuring a truncated airfoil for aerodynamics comfort and stiffness. The curve has been optimized for modern road levers. The innovative fit and ergonomics of the DRV system include a 7deg ramp angle and a 4 deg flare in the drops allowing a natural wrist angle for enhanced comfort and