Shimano BR-RS785 Hydraulic Disc Brake Caliper - Ultegra

Shimano BR-RS785 Road Post Type Hydraulic Disc Brake Caliper Front or Rear. High performance hydra...

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Product Information

Full details

This guide is for cyclists using the Shimano BR-RS785 hydraulic disc brake caliper, part of the Ultegra series. It offers superior braking performance in all conditions, enhancing rider control and safety. However, it's essential to understand proper setup and maintenance for optimal function.

All features

SeriesUltegra
Model Part NumberBR-RS785
BrandSHIMANO

Extended Product Information

FAQs

What type of brake fluid should I use?

Use Shimano-approved mineral oil.

How often should I bleed my brakes?

Bleed your brakes when the lever feel becomes spongy or performance is reduced.

What type of rotors are compatible?

Compatible with rotors designed for hydraulic disc brakes, preferably using Ice Tech FREEZA Centre-Lock SM-RT99 rotors for optimum performance.

How do I clean the calipers and rotors?

Use a clean cloth and isopropyl alcohol to clean the rotors. For the calipers, use a damp cloth.

What should I do if my brakes are rubbing?

Check and re-align the caliper. Make sure the wheel is properly seated.

What is the lifespan of the brake pads?

The lifespan of brake pads depends on usage. Inspect regularly and replace when worn.

Are these brakes suitable for all types of bikes?

They are designed for road bikes and require compatible frame and fork mounts.

Troubleshooting

Brakes feel spongy or have excessive lever travel.

Bleed the brake system to remove air bubbles. Ensure proper brake fluid level.

Brakes are rubbing or dragging.

Check rotor alignment within the caliper. Adjust the caliper position or, if necessary, re-center the wheel.

Braking power is reduced.

Inspect brake pads for wear and replace if necessary. Check for leaks in the hydraulic system.

Brake lever feels hard to pull.

Check for any obstructions in the brake lines. Ensure the calipers and levers are properly lubricated.

Pros and Cons

Pros

  • Enhanced braking performance in wet and dry conditions.
  • Improved modulation and control compared to rim brakes.
  • Durable construction ensures longevity.
  • Reduced hand fatigue during long rides.
  • Consistent performance, even with heavy use.

Cons

  • Requires specific hydraulic brake fluid (mineral oil).
  • Setup can be more complex than traditional rim brakes.
  • Requires compatible rotors.
  • May require professional servicing for complex issues.
  • Higher initial cost compared to some other brake systems.

Setup, Compatibility & Care

Ensure compatibility with your frame and fork, checking for appropriate mounting points (International Standard or Post mount with adapters if needed). Use Shimano-approved mineral oil for bleeding and maintenance. Install the caliper, ensuring the rotor is correctly aligned within the caliper. Bleed the brake lines to remove air bubbles, following the manufacturer's instructions. Regularly inspect brake pads for wear and replace them as needed. Clean the calipers and rotors periodically to remove dirt and debris. Always ensure the system is properly maintained to avoid performance issues.

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