Jagwire Sport Derailleur Housing

Yes, this 4mm housing is the industry standard for derailleur systems on both road and mountain bikes. It is designed to work with standard derailleur cables, not brake cables.

Linear strand construction prevents the housing from compressing when you shift gears. This stiffness ensures that the force from your shifter is transferred directly to the derailleur, resulting in more precise and responsive gear changes.

No, you do not need to add extra lubricant. The internal liner is pre-lubricated during manufacturing with Slick-Lube, which provides consistent, low-friction performance right out of the box.

No, you should not use this for brakes. Brake housing requires a different, coiled construction to handle the high pressure of stopping forces, whereas this derailleur housing is designed specifically for the low-compression needs of shifting.

The color is purely cosmetic. This is part of the Jagwire Sport line, which is designed as a reliable, high-performance upgrade over stock housing, regardless of the color you choose.