The Campagnolo Ekar AFS Disc Rotors [paid link] are known for their precise performance and reliability, but like any braking system, they can face issues if not properly set up and maintained. One common issue riders encounter is the feeling of spongy brakes. This sensation often leads to poor braking performance, reducing your confidence and safety on the road. Understanding the causes of spongy brakes and how to address them can help restore your braking system to optimal performance.
In this article, we’ll break down the potential reasons your Ekar AFS Disc brakes might feel spongy and provide practical steps to improve the braking feel instantly.
Understanding the Spongy Brake Feel
A spongy feeling in your Ekar AFS disc brakes typically means that there’s air or moisture in the hydraulic brake lines, or there may be issues with the brake pads or rotor alignment. The sensation occurs when the brake lever feels softer than normal, requiring more travel to achieve the desired braking force. This can make it harder to stop quickly, and ultimately reduce the reliability of your braking system.
Causes of Spongy Brakes
- Air in the Hydraulic Lines
One of the most common reasons for spongy brakes in hydraulic disc brake systems like the Ekar AFS is the presence of air in the brake lines. Air bubbles can compress when you apply the brakes, causing a delay or a lack of stopping power. Over time, air can enter the system, either due to improper installation, brake fluid degradation, or leaks. - Moisture Contamination
Moisture in the brake lines can also cause a spongy feel. This usually happens when the brake fluid is exposed to humidity or if the system hasn’t been bled properly. Moisture can cause the brake fluid to degrade, reducing the system’s performance and introducing air pockets. - Old or Contaminated Brake Fluid
If the brake fluid has been in the system for a long time, it can lose its performance due to contamination. Degraded fluid may not transmit pressure effectively, resulting in spongy brakes. Additionally, old brake fluid can cause corrosion and affect the overall braking system. - Worn Brake Pads
Over time, brake pads will wear down, which can cause inconsistent brake performance. If the pads are worn unevenly or become contaminated with dirt or oil, you may feel a spongy or delayed braking response. - Improper Pad and Rotor Alignment
If the brake pads are not properly aligned with the rotor, or if there’s an issue with the rotor’s surface, the result can be inconsistent contact between the pads and the rotor. This leads to poor braking performance and can contribute to a spongy brake feel.
How to Fix Spongy Ekar AFS Disc Brakes
- Bleed the Brakes
The first and most important step in fixing spongy brakes is to perform a brake bleed. This process removes air from the brake lines, ensuring that the brake fluid can transmit force efficiently. To bleed the Ekar AFS brakes, follow these steps:- Ensure that your bike is on a stable surface, and place it in a position where you can easily access the brake levers and calipers.
- Use Campagnolo’s recommended brake fluid (DOT fluid or mineral oil [paid link], depending on your brake system).
- Attach a brake bleed kit [paid link] to the caliper and brake lever, making sure the collection container is positioned below the brake caliper to catch any fluid.
- Open the bleed valve on the caliper and gently pump the brake lever to expel air from the system. Follow the manufacturer’s instructions for the exact procedure, ensuring you purge all the air from the system.
- Once the air is removed, top up the brake fluid and seal the system. Test the brakes by squeezing the lever. If it feels firmer, you’ve successfully removed the air.
- Replace Brake Fluid
If bleeding the brakes doesn’t fully resolve the issue, consider replacing the brake fluid entirely. Over time, brake fluid can absorb moisture, especially in humid conditions, which lowers its boiling point and reduces its performance. Replace the fluid with fresh, high-quality fluid recommended by Campagnolo. - Check and Replace Brake Pads
Inspect your brake pads for wear and contamination. If the pads are worn down to the wear indicators or have been contaminated with oil, dirt, or water, replace them immediately. Contaminated pads can cause poor braking performance and increase rotor wear. When installing new pads, make sure they are properly aligned with the rotor to prevent issues with braking efficiency. - Align the Brake Pads and Rotors
Misalignment of the brake pads or rotors can lead to inconsistent braking and a spongy feel. Check the alignment by visually inspecting the brake pads relative to the rotor. If they are not parallel, adjust them by fine-tuning the position of the caliper or brake pads until the pads are aligned evenly with the rotor’s surface. Also, inspect the rotor for any warping or uneven wear, which can cause braking issues. - Check for Leaks
Inspect the hydraulic brake lines and fittings for any signs of leaks. Even small leaks can allow air to enter the system, leading to spongy brakes. If you notice a leak, it’s important to address it immediately by either tightening the fittings or replacing damaged components.
Preventative Maintenance Tips to Avoid Spongy Brakes in the Future
- Regularly Bleed Your Brakes
To ensure optimal performance, it’s a good idea to bleed your Ekar AFS disc brakes periodically, especially if you notice any decrease in braking power. Regular maintenance will keep air from entering the system and prevent potential braking issues. - Inspect Brake Fluid and Pads Frequently
Keep an eye on your brake fluid level [paid link] and the condition of your brake pads. Replace the fluid every 12-18 months or sooner if it appears dirty or discolored. Similarly, check your brake pads for wear and replace them when necessary. - Store Your Bike Properly
Avoid storing your bike in areas with high humidity, as moisture can contaminate your brake system. Also, ensure your bike is stored in a cool, dry place to preserve the integrity of the brake fluid and other components.
Conclusion
Spongy brakes on your Ekar AFS Disc Rotors [paid link] can be frustrating, but with proper maintenance and care, you can quickly restore optimal braking performance. By addressing issues like air in the lines, old brake fluid, or misalignment of components, you can ensure a smooth, responsive ride every time you hit the road. Regular maintenance is key to extending the lifespan of your brake system and keeping your bike’s performance at its peak.