Disc Brakes, Oils and Maintenance

Better performance and more consistent response!

Disc Brakes for Bicycles, everything you need to know about oils and maintenance.

When it comes to bicycle brakes, disc brakes are among the most popular and efficient options available on the market. They offer better performance in varied conditions and a more consistent response than rim brakes, especially in wet or muddy conditions. However, to maintain this performance, it's crucial to understand the types of oil used in hydraulic systems and the maintenance practices required.

Types of Oil for Disc Brakes

Hydraulic disc brake systems on bicycles generally use two main types of fluid: mineral oil and DOT (Department of Transportation) fluid. The choice of fluid is critical and must be compatible with the manufacturer's specific system, as using an incompatible fluid can damage internal components and compromise safety.

-Mineral Oil

Used by manufacturers such as Shimano, mineral oil is favoured by many due to its chemical stability and lower corrosivity. It doesn't absorb moisture from the environment, which helps maintain its characteristics over time, reducing the need for frequent replacements.

-DOT fluid (4 and 5.1)

SRAM brake systems, for example, generally use DOT fluids. These fluids are glycol-based and can absorb moisture from the air, which requires more frequent changes to avoid lowering the boiling point and the formation of air bubbles, which can reduce the effectiveness of the brakes.

Disc brake maintenance

Regular maintenance is essential to ensure the effectiveness and safety of disc brakes. Here are some recommended practices:

1. Checking the Oil Level: Regularly check the oil level in the reservoir. Low oil levels can indicate leaks that need to be repaired immediately.

2. Oil Replacement: For systems with mineral oil (such as those from Shimano), a replacement every two years is recommended. For systems using DOT fluid (such as SRAM's), the ideal is to replace the oil at least once a year due to its tendency to absorb moisture.

3. Cleaning the components: Clean the discs and pads regularly to remove dirt and debris that can compromise brake performance. Use specific cleaning products for disc brakes to prevent damage.

4. Brake Pad Inspection: Check the brake pads for wear and replace them when necessary. Worn brake pads not only reduce the efficiency of the brakes, but can also damage the discs.

5. Bleeding the System: The bleeding process removes air bubbles from the hydraulic system, which is essential for maintaining the effectiveness of the brakes. Carry out this task as recommended by the manufacturer, especially after oil changes or when brake performance seems compromised.

Keeping your bike's disc brakes well maintained and using the correct fluids not only guarantees the best performance, but also increases safety during your journeys. Whether you're a trail, road or urban cyclist, understanding and correctly applying care to your disc brakes is essential for a superior experience.

Always travel safely and if you have any questions, we're here to help.