The break-in process for bicycle disc brakes is an extremely important procedure, yet it is often overlooked by many cyclists. Especially with the widespread adoption of road bikes in recent years, both road and mountain bikes on the market are now almost entirely disc brake-equipped. However, the majority of cyclists who purchase bikes with disc brakes do not go through the necessary brake system break-in process for their bikes.

Why is Brake System Break-In Important?

Brake system break-in allows you to fully utilize the maximum braking power, ensuring that the brake pads engage effectively with the brake discs, achieving higher braking efficiency. In simple terms, it helps the entire braking system function more optimally, giving the rider a better experience.

Technical Perspective on Brake-in

From a technical standpoint, the break-in process ensures that a small portion of the brake pad material evenly bonds to the surface of the brake disc. This significantly improves braking performance. It’s important not to put excessive pressure on the braking system during the initial break-in phase—avoid aggressively squeezing the brake lever or braking for long periods, as this can cause the brake pads and discs to overheat, compromising the braking performance and integrity. Essentially, it is best to avoid steep downhill sections before the system is properly broken in.

Break-In for New Bikes and Replacement Brake Pads

The break-in process is not just for new bikes; it is equally important when replacing brake pads on an existing bike. So how do we typically break in our braking system? We recommend maintaining a speed range of 15-25 km/h and applying a moderate amount of braking force to allow the brake pads to make contact with the discs and gradually smooth out the surface material of the pads.

Why is Brake Pad Surface Evenness Important?

Why is this important? Because nothing in the world is perfectly smooth. On a microscopic level, everything has roughness and irregularities, and brake pads and discs are no exception. If the surface of the brake pads is uneven, braking force will be distributed unevenly, causing vibrations that can negatively affect the overall ride quality.

Different Brands’ Recommendations for Brake-In

Different brands offer different recommendations for the brake-in process. For example, SRAM suggests a two-stage process for users to break in their brakes. The process should be carried out on a relatively empty road to ensure safety while performing these operations.

Stage One: Moderate Speed Braking

In the first stage, accelerate the bike to a moderate speed (about 20 km/h), then gently squeeze the brake lever to reduce speed to around 5 km/h, but do not bring the bike to a complete stop to ensure good ventilation of the brake disc. Repeat this procedure about 20 times, with a few seconds of pause between each. Alternate between the front and rear brakes.

Stage Two: Higher Speed Braking

In the second stage, increase speed to a higher level (around 30-35 km/h), and apply more decisive braking. However, do not allow the bike to come to a full stop. Repeat the process about 10 times, alternating between the front and rear brakes. This ensures that the brake discs get sufficient cooling. Important note: All operations should be performed while seated on the saddle.

Conclusion: Brake-In is Essential for Performance

In conclusion, performing an effective break-in for your bike’s braking system will enhance the braking efficiency of your new bike, ensuring that you can brake decisively during downhill riding or emergency situations. Additionally, when the brake pads or discs are completely worn and replaced, the break-in process should be repeated to ensure that the new brake system operates more efficiently.