Parts 8.3 offers with this professional 30-meter derailleur housing an economical and high-performance solution for workshops and bike shops. This Ø4mm roll in a generous format guarantees precise derailleur cable guidance and optimal protection against friction and weather, an essential element for the proper functioning of any bike transmission.

Technical Summary

This derailleur housing with a standard diameter of 4 mm is designed with an incompressible longitudinal structure, guaranteeing precise gear indexing regardless of the housing curvature. Its low-friction internal liner ensures smooth cable movement for crisp and responsive gear changes. The 30-meter roll packaging in a dispenser box facilitates workshop work and allows equipping multiple bikes or performing numerous maintenance operations.

Technical Highlights

• Anti-compression construction: structure with longitudinal parallel wires that maintains constant length even when curved, essential for precision indexed gear changes
• Universal compatibility: 4 mm diameter compatible with all road and MTB derailleur systems (Shimano, SRAM, Campagnolo, microSHIFT...)
• Low-friction liner: smooth internal coating for optimal cable movement and immediate shifter response
• Economical professional format: 30 m roll ideal for workshops, reducing cost per meter while maintaining reliable quality
• Durable protection: housing effectively protecting the cable against wear, friction and water or dust infiltration

Why Choose Parts 8.3?

Parts 8.3 is a French brand recognized for offering cycling components that are proven, relevant and with the best quality-price ratio. Without marketing hype, the brand focuses on the essential: functional and reliable products that meet the concrete needs of cyclists and mechanics. This derailleur housing perfectly illustrates this philosophy: technical performance, broad compatibility and economical format for professionals.

Usage and Installation Tips

• Clean cut required: use quality cable cutters to guarantee a clean and perpendicular cut
  • Make the cut when the housing is in curved position (particularly for rear derailleur) to avoid beveling the parallel wires
  • Deburr if necessary for perfect ferrule fitting
• Housing ferrules essential: always install Ø4mm housing ferrules at the ends to protect shifters and derailleurs (the longitudinal wires could damage the aluminum components)
• Optimal length: precisely measure required lengths by positioning the handlebar in different positions to avoid excessive tension or loops that are too large
• Minimal maintenance: a drop of light oil at the ends can improve movement, but without excess to avoid long-term fouling
• Regular replacement recommended: to maintain optimal performance, replace the housing at first signs of wear, cracking, fouling or kinking

Compatible Applications and Setups

This housing is perfectly suited for:

• Road bikes: road transmission 8/9/10/11/12 speeds
• MTB and gravel: all types of MTB transmissions, from cross-country to enduro
• Urban and trekking bikes: for reliable daily transmissions
• Professional workshops: economical format for permanent stock
• Clubs and associations: for bike fleet maintenance