Dura-Ace RS900 Road gear cable set,Complete top-of-the-range gear cable set designed to suit Dura-Ace R9100 gears ,Fitting new gears or completely overhauling your gear cabling couldn\'t be easier - everything you need in one pack ,Includes 1.2 mm Polymer coated inner wires (1 x 2100 mm, 1 x 1800 mm), OT-RS900 outer casing (1 x 240 mm) and OT-SP41 outer casing (1 x 1700 mm), and all end caps ,Polymer coated stainless steel inner wire leaves a smooth surface for low friction and reduced sliding resistance providing a lighter quicker shifting operation ,Outer casing is lubricated internally along its length with low-friction silicone grease to reduce cable friction ,OT-RS900 outer casing has added compliance to allow for new road Shadow mech design requirements ,SP 41 outer casing uses a special directional wound construction process makes for an axially stiff cable that transmits shifting movements accurately and quickly ,Outer casing is lined with a polymer sheath to assist with the smooth operation of the inner wire.