TEKTRO 5.5MM HOSE FITTING KIT

The Essential Connection for Tektro Brake Systems.

The Tektro 5.5mm Hose Fitting Kit is a critical service component for anyone shortening or replacing hydraulic lines on Tektro or TRP braking systems. Unlike many modern road and mountain bike brakes that have moved to a thinner 5.0mm standard, many Tektro systems continue to utilise a high-volume 5.5mm hose. Using the incorrect size fitting on these hoses is a leading cause of leaks and dangerous pressure loss, making this specific kit an essential part of any home mechanic's "spares" drawer.

This kit provides the two most vital components for a hydraulic seal: the brass olive (compression sleeve) and the insert pin (barb). When you tighten the compression nut on your brake lever, the olive is crushed onto the hose, creating a permanent, airtight, and high-pressure seal. Because these components are designed to deform during installation to create that seal, they are strictly single-use items and must be replaced every time a hose is disconnected or trimmed.

Key Features

• High-Volume 5.5mm Specific: Precision-engineered to fit the larger internal and external diameters of Tektro’s heavy-duty hydraulic hoses.

• Precision-Machined Brass: Both the olive and the insert pin are made from high-grade brass, offering the perfect balance of malleability for a good seal and strength to resist high hydraulic pressures.

• Leak-Free Performance: Designed to integrate perfectly with Tektro and TRP levers and callipers, ensuring a factory-standard connection.

• Essential for Custom Builds: If you are building a new bike with internal routing, these are the parts you need to re-terminate the hoses after feeding them through the frame.

• Single-Use Integrity: Replacing these parts during every service ensures the safety and reliability of your braking system under extreme heat and pressure.

Technical Specifications

✅ Why This IS For You

• DIY Brake Servicing: If you are shortening your brake lines to clean up your cockpit and want to ensure a professional, leak-free result.

• New Frame Builds: Essential for riders moving their Tektro brakes from one frame to another, especially when internal cable routing is involved.

• Safety-Conscious Mechanics: For those who understand that braking components are not the place to "recycle" parts or cut corners with incorrect sizing.

❌ Why This May NOT be for you

• Shimano or SRAM Users: This kit is not cross-compatible; Shimano typically uses 5.0mm fittings (BH59 or BH90), and using a Tektro 5.5mm kit on those systems will result in a failed seal.

• TRP 5.0mm Hose Systems: Some newer high-end TRP models have transitioned to 5.0mm hoses; always verify the diameter printed on your hose before purchasing.

BFC Pro Tip

When installing the Tektro 5.5mm insert pin, it is highly recommended to use a dedicated Hydraulic Hose Tool rather than a hammer. Pressing the pin in ensures it stays perfectly straight, which is vital for the olive to seat correctly over the top. Once the hose is inserted into the lever, ensure the compression nut is tightened to the correct torque (usually 5-7Nm)—over-tightening can crack the olive or the lever body, while under-tightening will lead to slow mineral oil leaks!