Sumart Internal Cable Routing Kit

Sumart CRK-4 Internal Cable Routing Kit

Make internal cable routing faster, cleaner, and far less frustrating.

The Sumart CRK-4 Internal Cable Routing Kit is an all-in-one solution for routing brake hoses, shift cables, and Di2 wires through modern bike frames and handlebars. Designed to simplify one of the most tedious parts of bike assembly and service, this kit includes magnet-tipped routing cables, a magnet guide tool, and multiple adapter tips to help you guide lines through even complicated internal frame layouts with more control and less hassle.

Whether you are working on a carbon road bike, gravel bike, mountain bike, or a fully internally routed cockpit, the CRK-4 helps reduce installation time and lowers the chance of scratching components, fighting blind frame passages, or repeatedly re-running hoses and wires. It is a valuable tool for both professional bike mechanics and home mechanics who want cleaner, more efficient cable and hose installation.

Key Features & Benefits

• Complete Internal Routing Kit: Includes the essential tools needed to guide brake hoses, shift cables, and electronic wires through frames, forks, handlebars, downtubes, and chainstays.
• Magnet Guide Tool: A strong guide magnet helps pull and position routing cables through carbon or aluminum frame sections with greater control and less trial and error.
• 2.5 m Magnet-End Routing Cables: Long, flexible installation cables provide enough reach for full-length routing jobs on a wide range of bike frames.
• Versatile Adapter Tips: Includes adapter options for brake hose routing and Di2 wire installation, making the kit more useful across mechanical and electronic drivetrain setups.
• Faster, Cleaner Installation: Helps reduce shop time and installation frustration when compared with improvised routing methods.
• Professional and Home Shop Friendly: Useful for new bike builds, frame swaps, maintenance, and drivetrain or brake upgrades.

Why Use an Internal Cable Routing Kit?

Internal cable routing can be one of the most time-consuming parts of bike assembly, especially on frames with long internal passages, tight bends, or fully integrated cockpit routing. A dedicated bike internal cable routing kit makes the process more controlled and efficient by helping mechanics guide hoses and wires through the frame without repeated guesswork. The Sumart CRK-4 is designed to save time, reduce frustration, and make routing jobs more predictable on both mechanical and electronic bike setups.

Specifications

• Model: CRK-4
• Product Type: Internal cable routing kit
• Cable Length: 2.5 meters (magnet-end cables)
• Included Tools: Magnet guide tool, tapered adapter tip, and Di2 adapter tip
• Application: Internal routing of brake hoses, shift cables, and electronic wires
• Compatibility: Mechanical and electronic drivetrains

Ideal For

The Sumart CRK-4 Internal Cable Routing Kit is ideal for bike shops, home mechanics, and riders building or servicing modern bikes with internal routing. It is especially useful for road bikes, gravel bikes, mountain bikes, and internally routed cockpits where routing brake hoses, shift housing, and electronic wires can otherwise become slow and frustrating.

Take the headache out of internal routing with the Sumart CRK-4, a practical workshop tool built to make bike builds and maintenance faster, cleaner, and more efficient.