The DriVe road bar solution gives progressive sizing along with ergonomics specifically designed for current road bike geometry and shifter hood shapesBy giving variable reach in 5mm increments, a rider/fitter is able to fine tune the reach of their bike,The area right behind the shifter hood has a reduced slope of 7° - delivering a seamless transition from bar to shifter/brake hood without affecting how the drops were designed to fit the hand,By expanding the 31.8mm diameter to the end of the bar there is an increase in the useable area to allow for more hand positions and alleviate pressure points,Constructed from double butted 6061-T6 AL,Size specific ergonomics,Clip on aerobar compatible.