Mineral brake oil for compatible hydraulic bicycle brakes.

Brakco Mineral Brake Oil is a 50 mL bottle of hydraulic brake fluid for bicycle brake systems that specifically require mineral oil. It is a practical size for topping up or bleeding a single system, with a distinctive colour that helps you see fresh fluid moving through the hose during a full flush.

Fresh brake fluid is an important part of good brake performance. Over time, old fluid can become contaminated and a brake can develop a spongy lever feel. Replacing the fluid correctly helps restore consistent braking and gives you a clearer indication that old fluid and air have been removed from the system.

Mineral Oil Only

This fluid is for brakes designed to use mineral oil. Do not use it in systems that specify DOT brake fluid, and never mix brake-fluid types. Always check the marking on your brake lever or the manufacturer’s service information before starting work.

If you are unsure what fluid your brakes require, see our brake and suspension fluid range or contact the workshop before opening the system.

Made for Clean, Controlled Bleeding

The 50 mL bottle is easy to handle during home or workshop servicing. Its coloured fluid helps make it easier to identify when fresh oil has reached the caliper or lever during a bleed, particularly when flushing old fluid from a system.

For the best result, use clean, brake-specific bleed equipment, protect brake pads and rotors from contamination and follow the brake manufacturer’s bleed procedure.

Key Features

• 50 mL bottle of mineral hydraulic brake oil
• For bicycle brake systems that specify mineral oil
• Coloured fluid helps identify fresh oil during a bleed
• Suitable for brake bleeding, flushing and servicing
• Designed to support consistent lever feel when used correctly
• Convenient bottle size for home mechanics and workshop use

Before You Start

• Check that your brake manufacturer specifies mineral oil
• Never substitute mineral oil for DOT fluid or mix fluid types
• Keep fluid away from brake pads and rotors
• Use the correct bleed kit and follow the manufacturer’s procedure
• Dispose of used brake fluid responsibly

Not sure which tools or fittings you need? Read our Brake Bleed Kits: Which Kit Do You Need? guide.

Our Thoughts

A small bottle of the correct fluid is worth having if you service your own brakes. The important part is compatibility: use mineral oil only where the brake manufacturer calls for it, keep the job clean and take the time to fully remove air from the system. If your brakes are still inconsistent after a correct bleed, bring the bike into the workshop so we can check for worn seals, hoses or other faults.

Why Buy from Chain Reaction?

• Brake fluid and bleed-kit advice from experienced workshop staff
• Help confirming the correct fluid for your brake system
• Workshop servicing available if you would rather leave the bleed to us
• Independent Christchurch bike shop with ongoing support

Specifications

• Product: Brakco Mineral Brake Oil
• Volume: 50 mL
• Fluid type: Mineral oil
• Use: Hydraulic bicycle brake systems that specify mineral oil