To get the best performance from your Shimano road STI cable actuated shift levers, nothing beats a fresh cableset built around the incredible OPTSLIK derailleur cables. The super-low friction cables ride in Shimano's superior pre-lubricated OT-SP41 4mm OD derailleur housing. The two included OPTISLICK cables are 2100mm long, and 1700mm of housing is provided. You also get four polymer housing end caps (ferrules), plus one sealed version, an OT-SP41 pre-lubricated sealed housing end cap for the rear derailleur, and two cable end crimps.

The best mechanical shifters and derailleurs can't work to their engineered specifications without a high quality cable gliding smoothly within cable housing. Shimano's Optislik 1.2mm derailleur cable starts with a high quality, multi-strand, wound stainless steel cable, which is given an minimalist electrically-applied coated layer, which improves the ergonomics and reduces the shifting forces by 20% through its hyperslick properties. Durable and smooth throughout normal cable life, affordable Optislik cables allow your components to work effortlessly, with the excellent performance you desire while resisting corrosion.

Shimano's Cable Grease is the secret sauce that can improve any Shimano housing, but the SP41 housing is made with it, so a micro-thin layer is applied to the entire internal surface of the housing, which drastically reduces friction, but also won't collect dirt and dust when proper housing ferrules are used. This OPTISLIK Derailleur Cableset will exceed your expectations for performance, longevity and value.