Shimano 8170 Di2 Rh Sti W Bk Cycling Jacket Avoiding an interrupted seat tube Avoiding an interrupted seat tube gives more space for dropper posts plus improves access to the shock controls dexterity and durability Despite its smaller construction the system is quieter than ever and easier to maintain Features The wireless connection provides a clean cockpit enhancing the aerodynamic effect and easy maintenance Wider pad clearance decreases brake noise Maintenance friendly bleeding process Unparalelled ergonomic features such as raised hood peaks on levers Brake control is optimized with light and smooth lever action Enhanced modulation thanks to an expanded braking control area Compatible with wireless or wired connection