Clarks derailleur cable housing SP4 with Teflon 4 mm x 30 m green

Clarks derailleur cable housing SP4 with Teflon 4 mm x 30 m green is a length of lined cable housing intended for bicycle gear and derailleur systems. The inner Teflon lining lowers friction between the inner cable and housing, promoting smoother shifting and reducing cable wear. With a 4 mm inner diameter and 30 m length, this green housing is suitable for workshop spares, maintenance tasks, and full replacement of worn or damaged derailleur housings on road, hybrid, and commuter bikes.

Advantages

The Teflon-lined interior provides low-friction performance that helps achieve more consistent and responsive gear changes. The 4 mm inner diameter matches standard derailleur cables and ensures proper cable movement without excessive play. Supplied on a 30 m reel, the housing allows cutting to exact lengths for multiple repair jobs or complete cable runs. The green outer sheath offers visible routing for easier installation and inspection while maintaining adequate flexibility for typical frame routing and housing stops.

Suitable for

• Replacing worn or damaged derailleur housing on road and commuter bicycles
• Workshop stock for bicycle mechanics and servicing centers
• Custom cable routing where a visible outer color is preferred
• Maintenance and overhaul of gear systems on hybrid and city bikes

Key specifications

• Inner lining: low-friction Teflon (PTFE)
• Inner diameter: 4 mm
• Length: 30 m on a reel, cut-to-fit
• Outer color: green
• Compatible with standard derailleur/gear cables
• Flexible construction suitable for typical frame routing and cable stops

How to use

Measure the required housing lengths along the bicycle frame and through any stops or guides, then cut the housing cleanly with appropriate cable cutters to avoid fraying. Fit ferrules at each end where applicable, insert the inner cable through the Teflon-lined housing, and route the assembly according to the manufacturer's cable routing. After installation, adjust cable tension and indexing at the shifters and derailleur to ensure smooth operation. Trim any excess cable and secure ends with end caps or crimps as needed.

Usage recommendations

For best results, pair the housing with quality inner cables and replace both housing and cable if either shows signs of corrosion, kinking, or excessive friction. Use proper ferrules sized for 4 mm housing and ensure end cuts are square to maintain the low-friction properties of the Teflon lining.