Carves through wind and corners with ease the 2016 ar3 carves through wind and corners with ease aerodynamics standards are set to the highest level with the uhc performance carbon fibre and matched with our adjustable vibration reducing aero road flip position uhc carbon fibre seat post with the shimano 11 speed ultegra drivetrain the ar3 is an outstanding performer in any situation download a pdf copy of the felts ar tech sheet shimano ultegra drivetrain with plenty of technology taken