Complete OPTISLICK gear cable set designed to suit 105 5800 and Tiagra 4700 gearsFitting new gears or completely overhauling your gear cabling couldn't be easier - everything you need in one packIncludes 1.2 mm OPTISLICK inner wires (2 x 2100 mm), and SP41 outer casing for a complete bike (1 x 1700 mm), and all end capsOPTISLICK is electrically coated to the stainless steel inner wire leaves a smooth surface for low friction and reduced sliding resistanceOuter casing is lubricated internally along its length with low-friction silicone grease to reduce cable frictionSP 41 outer casing uses a special directional wound construction process makes for an axially stiff cable that transmits shifting movements accurately and quicklyOuter casing is lined with a polymer sheath to assist with the smooth operation of the inner wire