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Includes 1.2 mm Polymer spiral wrapped inner wires (1 x 2100 mm, 1 x 1800 mm), and SP41 outer casing for a complete bike (1 x 1700 mm), and all end caps.Polymer wrapped 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. 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.