Under a microscope, the Optislick coating looks like a series of tiny tubes wrapped around each cable strand. That geometry matters because it reduces the actual surface area making contact with the housing liner, which translates to less friction at the cable-housing interface. Shimano's Optislick Shift Cableset packages this coated cable technology with their pre-lubricated SP41 housing for a complete front and rear derailleur refresh on road bikes.

The coating is applied electrically to a stainless steel base cable, creating a thin polymer layer that stays uniform across the entire length. Shimano claims around 20% reduction in shifting effort compared to uncoated cables, and the coating also improves corrosion resistance beyond what bare stainless provides. The feel at the lever is noticeably lighter, with shifts that snap into place rather than dragging through the housing.

The OT-SP41 housing complements the cables with its own friction-reducing properties. Shimano applies silicone grease to the internal liner during manufacturing, so the housing arrives ready to install without additional lubrication. The 4mm diameter housing works with standard road shifter routing, and the 1700mm length covers most frames when cut appropriately for front and rear runs. You get two cable lengths in the set: 1800mm for the shorter front derailleur run and 2100mm for the rear.... Read More