Two-Bottle rear mount hydration system clamps to standard round diameter bicycle seat posts (31.6mm or 27.2mm). Affix two CO2 cartridges with included brackets.

• New reinforced design.
• Includes 2 lightweight Profile Design Kages.
• Includes CO2 mounting brackets.
• Fits 31.6mm to 27.2mm round diameter seatposts (shim included).

• Construction: 6061-T6 Forged Aluminum clamp and extension
• Cage Material: Injected Nylon/Glass Fiber (KA1 Cage)
• Capacity: 1 or 2 cages compatible 
• Cage: KA1
• Color: Matte Black
• Weight: 228g

* Includes 2 lightweight Profile Design Cages