The Cervlo S5 is a powerful road bike that is so fast and aero, some riders want to use it in a time trial or triathlon. In those situations, it is best used with aero bar extensions. This kit allows you to mount aero bar extensions to the standard bar version of the S5 as well as the V-Stem cockpit. It includes elbow pads, fixing brackets, and all the hardware you need to properly mount your aero bars. Everything is highly adjustable so you can find your ideal riding position regardless of what kind of bars you use. Please note that aero bars are not included in this product. The Cervlo S5 HB14 Bar Extension Mount turns your S5 into even more of an aero weapon.