Giant bottle cages. Designed to fit snugly against the frame of their Propel aero frame. Originally designed specifically for this purpose, the aero performance of the bottle cage itself was so good, and the mounting screw positions were the same as general bottle cages, that customization to attach them to aero frames from other companies seems to be popular among some athletes. The material is carbon, making it lightweight. The shape differs between the seat tube and down tube versions, and this is a pair. Recommended for Giant Propel, of course, and also for aero frames from other companies. Shipping will be on the same day or the next morning. #giant #propel #ジャイアント #プロペル #ボトルケージ #エアロフレーム