Rear hydration isn't just for triathletes: desert dwellers, and those prone to gruel a thons always need to carry as much hydration as possible. While many rear hydration systems are optimized for racing, the Speedfil Hydration R3 system was designed to fit any saddle and any rider, to keep everyone hydrated. The secret to the adaptability of the R3 System is a dual pivot design Essentially, the system is designed using what looks like a giant bicycle chain link. This allows the cage holder to move in two directions so that it is able to fit around the shape of your saddle. Not only does this mean that you won't be poke din the back by your bottles, you are also able to adjust the positioning for maximum aerodynamics. With the lightweight R3, you have several configuration options. Single or dual bottles may be mounted to the links, it carries two C02 cartridges, and hook and loop straps secure tubes or tires to the carrier. The Speedfil Hydration R3 Single and Dual Carrier is available in One color. It is compatible with any saddle, including ISM saddles, without additional hardware.