Gear cable housing Clarks SP4 with Teflon liner 4 mm × 30 m, white

Clarks SP4 gear cable housing with Teflon liner is a 4 mm diameter, 30 m length coil in white, designed for use with bicycle derailleur and gear systems. The housing provides a smooth internal surface to reduce friction between the inner cable and the sleeve, enabling reliable shifting performance. Supplied as a continuous length, it can be cut to size for repairs, maintenance or custom cable routing on road, hybrid and city bikes.

Advantages

The Teflon-lined interior lowers friction to help maintain consistent shifting response and reduces wear on the inner cable. The 4 mm outer diameter matches common gear cable standards and allows compatibility with standard ferrules and end caps. The 30 m coil provides enough length for multiple spares or full-frame replacements, and the white outer sheath offers a neutral appearance that blends with many frame colours. The construction balances flexibility for routing with sufficient stiffness to support guided cable runs.

Suitable for

• Derailleur and gear systems on road, city and hybrid bicycles
• Long cable runs and custom routing where a continuous housing length is required
• Workshop repairs, maintenance kits and stocking spare housing

Key specifications

• Inner liner: low-friction Teflon (PTFE) surface
• Outer diameter: 4 mm
• Length: 30 m continuous coil
• Colour: white outer sheath
• Designed for mechanical gear/derailleur cable systems

How to use

Measure the required length on the bicycle and mark the housing where it needs to be cut. Use a fine-toothed saw or dedicated cable housing cutter to obtain a clean end; avoid crushing the housing. Fit appropriate ferrules or end caps to match the 4 mm diameter and install the inner cable through the Teflon-lined sleeve. Route the housing along the frame ensuring smooth bends and secure it with clips or ties where necessary. After installation, adjust derailleur limits and indexing according to the manufacturer's procedure.

Usage recommendations

Regularly inspect the housing for kinks, splits or excessive wear and replace sections that impede smooth cable movement. For best performance, use compatible ferrules and quality inner cables, and apply lubricant to exposed cable sections if recommended by the bicycle component manufacturer.