Brake fluids and mineral oils

Bicycle brake fluids and mineral oils are essential components in the braking systems of many modern bicycles, particularly those with hydraulic disc brakes.
Brake fluids are typically used in hydraulic disc brakes, and they come in two primary types: DOT (Department of Transportation) fluid and mineral oil. DOT Brake Fluid: This type of brake fluid is a synthetic fluid formulated to meet specific Department of Transportation standards. DOT brake fluids are known for their high boiling points, which help prevent brake fade during intense braking. They are commonly used in mountain bikes and some road bikes. DOT 3, DOT 4, and DOT 5.1 are common grades of DOT brake fluid, with higher numbers indicating a higher boiling point. Mineral Oil: Mineral oil, on the other hand, is a non-corrosive and non-toxic alternative to DOT brake fluid. It's typically used in Shimano hydraulic disc brake systems. Mineral oil-based systems are valued for their consistent performance and ease of maintenance. They are less prone to absorbing moisture compared to DOT brake fluids.
When choosing between brake fluids or mineral oils for your bicycle's braking system, it's crucial to follow the manufacturer's recommendations. Mixing the two types can lead to brake system damage or failure. Regular maintenance, including bleeding the brake lines, is essential to ensure optimal brake performance and safety. In summary, bicycle brake fluids and mineral oils play a critical role in hydraulic disc brake systems, providing the hydraulic pressure needed to stop your bike efficiently. The choice between them depends on your bike's brake system and manufacturer's specifications.

Check out our video "A quick way to bleed Shimano brakes"