FC35 Drink System Color:Black 11-28 and 11-30 are compatible

11-28 and 11-30 are compatible with SS rear derailleur

Multi-thickness padded non-slip palm

Designed specifically for Di2 derailleurs

a bell with a beautiful tone

This small chain tool goes anywhere and actually performs like a shop quality tool

FC35 Drink System Color:Black 11-28 and 11-30 are compatibleThe FC System was designed with one thing in mind: to bring together the most compelling details into one all inclusive hydration system. Streamlined Storage: New Profile Design FC Hydration Systems were designed with one thing in mind to create a clean front end solution that thoughtfully integrates hydration, nutrition and electronic needs. Integrated storage streamlines nutrition needs into rear airfoil compartment. Forward Computer Mount: Computer