The Shimano Mineral Oil (100 ml) is the official hydraulic brake fluid used in all Shimano disc brake systems. It is designed to provide consistent braking performance, smooth lever feel, and long-term protection of internal brake components.
Shimano Mineral Oil 100ml Hydraulic Brake Fluid
What it is
This is:
- hydraulic brake fluid for Shimano disc brakes
- a non-corrosive mineral oil (not DOT fluid)
- used in all Shimano hydraulic MTB and road brake systems
It is required for:
- bleeding brakes
- topping up brake systems
- maintaining lever feel and performance
Key features
Mineral oil formula
- non-toxic compared to DOT fluids
- does not absorb water (hydrophobic)
- stable performance over time
- less corrosive to seals and paint
Shimano-specific compatibility
Only compatible with:
- Shimano hydraulic disc brakes (all models)
- NOT compatible with DOT-based systems (e.g. SRAM brakes)
Using the wrong fluid can:
- damage seals
- cause brake failure
- void warranty
Consistent braking performance
Shimano mineral oil is designed to:
- maintain smooth lever feel
- reduce sponginess
- ensure predictable braking force
- perform consistently in hot and cold conditions
When it’s used
You need Shimano mineral oil when:
- bleeding hydraulic brakes
- replacing brake hoses
- fixing spongy lever feel
- performing routine maintenance
Why it matters
Hydraulic brakes rely on incompressible fluid to transmit force:
F=P×A
Where:
-
F = braking force at caliper
-
P = hydraulic pressure from lever
-
A = piston area in caliper
Any air or degraded fluid reduces pressure transfer, leading to weak or inconsistent braking.
Pros
- safe and non-corrosive
- stable long-term performance
- easy maintenance compared to DOT systems
- optimized for Shimano brake seals
Trade-offs
- only usable in Shimano systems
- requires correct bleeding technique/tools
- not interchangeable with DOT brake fluids
Bottom line
Shimano Mineral Oil (100 ml) is a specialized hydraulic brake fluid designed exclusively for Shimano disc brakes, ensuring smooth, consistent, and safe braking performance while protecting the internal components of your brake system.
