Shimano Optislick Derailleur Cable Shifting Smoothly The cables you use affect how well your derailleurs shift. Not all shifting cables are made the same, so make sure you get exceptional cables. The Shimano Optislick Derailleur Cable is coated for smooth and efficient shifting action. It has a length of 2100mm, so you can use it for the front or rear derailleur. Features Coated cable for smooth and efficient shifting Length: 2100mm Compatible with Shimano or SRAM shifters | Shimano | Optislick Derailleur Cable 1. 2 X 2000Mm