how to feed hydraulic brake hose thru frame


One of the most important components of a bike is its brake system, as it ensures the rider's safety by providing efficient stopping power. Hydraulic brakes, in particular, have gained popularity in recent years due to their superior performance and reliability. However, one challenge that many bike enthusiasts face is feeding the hydraulic brake hose through the frame. In this article, we will guide you step by step on how to complete this task, ensuring smooth brake operation and overall bike performance.

Understanding the Hydraulic Brake System

Before delving into the process of feeding the hydraulic brake hose through the frame, it is crucial to have a basic understanding of the hydraulic brake system. Unlike traditional cable-operated systems, hydraulic brakes use fluid to transfer force from the brake lever to the caliper, resulting in a more responsive and powerful braking mechanism. The brake hose carries the hydraulic fluid from the brake lever to the caliper, making it an integral part of the system.

Gathering the Required Tools and Supplies

To feed the hydraulic brake hose through the frame, you will need a few tools and supplies. Make sure you have the following items before starting the process:

1. Hydraulic brake hose: Ensure you have the appropriate length of brake hose for your specific bike model.

2. Hydraulic brake fluid: Choose a high-quality brake fluid recommended by the manufacturer.

3. Brake lever and caliper: Have the lever and caliper ready to be installed after feeding the hose.

4. Zip ties: These will be useful for securing the hose once it is properly routed through the frame.

5. Cutting tool: Use a sharp blade or a dedicated hydraulic hose cutter to trim the brake hose down to the required length.

Preparing the Frame

To avoid potential damage to the brake hose and the frame, it is essential to prepare the frame before attempting to feed the hose through it. Start by removing any existing cable housings or obstructions that may interfere with installing the hydraulic hose. Additionally, check if your frame has designated entry points or cable guides that can facilitate the routing process. If not, consider using protective shields or cable clips to prevent the hose from rubbing against the frame, ensuring longevity and optimal performance.

Routing the Hydraulic Brake Hose

Now that you have prepared the frame, it's time to route the hydraulic brake hose. Begin by attaching the hose to the brake lever, making sure it is securely fastened. Then, carefully thread the other end of the hose through the frame, being mindful of any potential snag points or sharp edges that could damage the hose. If needed, utilize zip ties to secure the hose along the frame, ensuring a clean and organized appearance. Take your time during this step to avoid kinks or bends in the hose, as they can disrupt the hydraulic fluid's flow and compromise brake performance.

Connecting the Brake Lever and Caliper

Once you have successfully routed the hydraulic brake hose through the frame, it's time to connect the brake lever and caliper. Begin by removing the protective caps from the brake lever and caliper ports, being cautious not to contaminate them. With the ports exposed, insert the ends of the hose into their respective ports, ensuring a secure fit. Next, tighten the connections using the appropriate fittings or bolts, following the manufacturer's recommended torque specifications. Double-check all fittings, ensuring they are properly tightened to prevent any leaks or pressure loss.


Feeding the hydraulic brake hose through your bike frame can initially seem daunting. However, with the right tools, proper preparation, and patience, you can accomplish this task smoothly. By understanding the hydraulic brake system, gathering the necessary supplies, preparing the frame, routing the hose, and connecting the brake lever and caliper correctly, you will ensure optimal brake performance and a safe riding experience. Remember, if at any point you are unsure or uncomfortable, consult a professional bike mechanic for assistance.


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