Designed specifically for saddle carrier mounting, the Tri-Cage Carbon is made from a carbon ber reinforced engineering grade polymer and the easy access “forward-release” design helps prevent accidental drops when reaching back for a bottle. An integrated bottom mount for Ninja T Road tool case, Ninja CO2 inflator, or Ninja Pouch Road spare tube carrier makes it easy to carry the essentials. Holds bottles up to 750cc. *Recommended bottle diameter 72mm - 74mm