The X-Lab Gorilla Carbon Cage helps prevent water bottles ejecting from cages on bumpy roads, mountain bikes and saddle-mounted water bottle cages. This water bottle cage was designed specifically for rear hydration systems. The carbon water bottle cage has over twice the gripping force of conventional carbon cages due to the 6 high shouldered carbon gripping fingers, tall retention tab at the top and thicker carbon. The X-Lab Gorilla Carbon water bottle cage will fit on any standard cage mounts. This is a TriSports.com favorite!