The X-Lab Carbon Sonic Wing bolts directly to a Cervelo Aero seatpost on the Cervelo P2, P3, and P4. It is an extremely functional, well-designed rear hydration system capable of carrying CO2 cartridges, an inflator, one or two bottle cages, tires, tubes and other items so they are very accessible. It weighs only 98 total grams and it made from aircraft-grade high-modulus carbon fiber. It includes a X-Lab Sonic Nut for holding CO2 cartridges and an inflator.
Please note: cages, bags, CO2 cartridges and inflator sold separately