R1 StemThe R1 Bar and Stem have been developed to be at the pinnacle of aerodynamics and stiffness, to ensure no power is lost in transfer when starting your track event, time trial or triathlon, and to be as slippery through the air as possible when on the move. The stem is machined from a single billet of aerospace grade 7075 alloy to ensure total integrity of the structure and compatible with all versions of the carbon R1 aerobars. The R1 track bar, stem