The Metron Aero handlebar combines the proven ergonomics and aerodynamics of the Metron 4D Flat with an increased surface area on the top section for additional hand positioning. Eliminating the MAS mounting system creates a cleaner look for riders not interested in mounting clip-on aerobars.- 10 Forward angle- Cable groove compatible with new Di2 systems w/larger internal cable tunnel- 31.8mm x W380+10mm, 400+10mm, 420+10mm, 440+10mm (c-c)- 125mm drop, 80mm reach- 2 outward bend