Shimano Hydraulic Mineral Oil - 100 ml

Shimano Mineral Oil for Hydraulic Disc Brake Systems - 100 ml

C$21.49 Excl. tax
Article number: Y83998020
Quantity in stock: 2

Shimano Hydraulic Mineral Oil

Genuine Shimano Mineral Oil is the only fluid compatible with Shimano brakes. 

  • 100 ml bottle

Mineral Oil vs DOT Fluids

Although Shimano made DOT fluid brakes in the 1960's and '70's, their modern brakes use mineral oil. Mineral oil won't harm painted finishes, and is less damaging to your skin and the environment. Chemically speaking, DOT fluid absorbs humidity from the air, and this absorbed moisture lowers DOT fluid's boiling point over time. Shimano mineral oil starts at a higher dry boiling point than any DOT fluid specification. The boiling point of mineral oils won't change over time because they don't absorb moisture. 

Hydraulic Brake Fundamentals

In order to understand why it's crucial to use the manufacturer's specified fluid, we'll explain how a bicycle disc brake works. 

When you pull the brake lever, you're moving a sealed piston inside the master cylinder. During the free stroke phase, the piston moves fluid through this port to the expansion reservoir.

Once the primary cup closes the port, the master piston pushes fluid down the hose, and the caliper pistons begin to move. The brake lever stops when the brake pads contact the rotor. Have you wondered how the pads retract from the rotor?

A square-edged rubber seal acts like a return spring. The square edged seal twists a little bit when the piston extends, and keeps tension on the piston. When you release the brake lever, the seal untwists and pulls the piston back to its starting position.The rubber components in the system fit in very tight tolerances. Incompatible fluids damage the rubber components, which no longer seal effectively. Using a third-party fluid will chemically compromise the rubber seals inside the system.

The correct fluid is your brake's lifeblood. No matter whose brake you own, use only the fluid authorized by that brand.

When it's time to service your brakes, it's also important to use brand-specific parts and bleed tools. Original hoses and hose fittings are just as crucial as the correct fluid.

EXTREMELY IMPORTANT: Never use DOT fluids in brakes designed for Mineral Oil, and vice versa!

We are doing our best to provide accurate and up to date descriptions, specifications and images of our products, but we cannot guarantee that they are absolutely correct. Please contact us if in doubt, or to confirm a particular feature or a spec which is important to you.
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