Bicycle gear cable Clarks SP4 with PTFE 4 mm x 30 m, silver

Clarks SP4 with PTFE is a 4 mm bicycle gear (derailleur) cable supplied on a 30 m roll in a silver finish. The cable features a PTFE (Teflon) coating that reduces friction between the inner wire and housing, intended to improve shifting consistency and lower wear in mechanical gear systems. Its dimensions and construction make it suitable for general workshop use, maintenance tasks and full cable replacements on a wide range of bicycles.

Advantages

The PTFE coating provides a low-friction surface that helps achieve smoother gear changes and reduces stickiness in the cable path. The 4 mm diameter offers a balance between tensile strength and flexibility appropriate for derailleur systems, while the 30 m roll length allows multiple repairs or full shop stocking without frequent resupply. The silver finish resists visible corrosion and integrates visually with common bike components.

Suitable for

• Workshop installations and bulk servicing of mechanical derailleur systems
• Replacing worn or frayed gear cables on road, hybrid and mountain bikes
• Custom cable routing where longer supply lengths are needed

Key specifications

• Coating: PTFE (Teflon) for reduced friction
• Nominal diameter: 4 mm
• Length: 30 metres on a roll
• Finish: silver
• Intended application: bicycle derailleur/gear cable

How to use

Cut the required length from the 30 m roll, taking care to make a clean, straight cut to prevent fraying. Thread the inner cable through the housing and adjust the routing to minimise sharp bends and contact points. Fit appropriate end caps and ferrules compatible with your bike’s cable stops and derailleur, then tension and fine-tune the derailleur according to the manufacturer’s setup procedure. Inspect the cable path and secure any loose sections to avoid chafing.

Usage recommendations

For best shifting performance, use the PTFE-coated cable with compatible housings and regularly inspect for abrasion or corrosion. When installing multiple cables from the roll, store the remaining length in a dry place to protect the coating. Replace the cable if fraying, kinking or reduced responsiveness is observed.