The Shimano BR-R8170 [paid link] disc brakes are renowned for their performance, reliability, and advanced technology. These hydraulic disc brakes are engineered to deliver consistent stopping power, excellent modulation, and superior heat dissipation, making them a popular choice for serious cyclists. However, even the best components require regular maintenance and fine-tuning to ensure they continue to perform at their best.

In this guide, we’ll walk you through the necessary steps to keep your Shimano BR-R8170 [paid link] disc brakes in optimal condition, from routine maintenance tasks to tips for extending their lifespan and enhancing their performance. Whether you’re a seasoned mechanic or a weekend rider, these tips will help you get the most out of your brakes.

Regular Cleaning and Maintenance

Regular cleaning is essential for maintaining the performance of your Shimano BR-R8170 [paid link] disc brakes. Dirt, grime, and brake dust can accumulate on the brake pads and rotors, reducing braking efficiency and increasing wear over time. Here’s how to keep things clean:

Cleaning the Rotors

1. Use a Degreaser: Apply a non-residue degreaser to the brake rotors to remove oils, grime, and brake pad residue.
2. Clean with a Cloth: Use a clean, lint-free cloth to wipe down the rotor. Make sure to remove any stubborn contaminants that may have built up on the surface.
3. Avoid Touching the Rotors: Always handle the rotors by the edges to avoid transferring oils from your fingers onto the surface.
4. Check for Damage: Inspect the rotor for any cracks or significant wear. If you notice deep scoring or excessive wear, it may be time to replace the rotor.

Cleaning the Brake Pads

1. Inspect the Pads: Check the brake pads for wear regularly. The Shimano BR-R8170 pads are designed to last for a long time, but if the pad material is worn down to the indicator line, it’s time to replace them.
2. Use Isopropyl Alcohol: For light cleaning, use a clean cloth and a small amount of isopropyl alcohol to wipe the pads clean. Avoid using any oil-based products that can affect braking performance.
3. Avoid Contaminants: Be cautious about exposing your brake pads to oils, lubricants, or dirt. If the pads become contaminated, you may need to replace them or thoroughly clean them to restore performance.

Bleeding the Brakes

Proper hydraulic brake fluid maintenance is key to ensuring consistent braking performance with the Shimano BR-R8170. Over time, air can enter the brake system, resulting in a spongy or inconsistent feel. Regularly bleeding the brakes ensures the hydraulic system operates correctly.

1. Prepare the Tools: You will need Shimano’s hydraulic brake bleed kit [paid link], including the syringe, brake fluid (Shimano Mineral Oil [paid link]), and a bleed block.
2. Position the Bike: Secure your bike in a stable position, either on a stand or against a solid surface.
3. Remove the Brake Pads: For safety, remove the brake pads to avoid contamination with fluid.
4. Attach the Syringe: Connect the syringe filled with Shimano Mineral Oil [paid link] to the brake lever’s bleed port.
5. Purge Air: Open the bleed valve on the brake caliper and push the brake fluid through the system until air bubbles stop emerging. Ensure the fluid level [paid link] in the syringe remains stable.
6. Reassemble and Test: Once the air has been purged, close the valve, remove the syringe, and reassemble the brake system. Test the brakes for firm lever feel and efficient braking performance.

Rotor and Pad Alignment

Improper alignment of the rotor or brake pads can lead to poor braking performance, excessive noise, or uneven wear. Here’s how to adjust them for the best results:

1. Check Rotor Alignment: Use a truing tool or calipers to check that the rotor is straight. If the rotor is slightly bent, carefully adjust it to ensure it runs true within the caliper.
2. Align the Caliper: If the rotor is aligned but still rubbing on the pads, you may need to adjust the caliper. Loosen the caliper mounting bolts, center the caliper over the rotor, and then retighten the bolts. Ensure that there is equal space between the pads and the rotor.
3. Pad Adjustment: For the Shimano BR-R8170, ensure that the pads are correctly aligned with the rotor. Any uneven contact can reduce braking performance and cause premature wear.

Optimizing Brake Levers and Brake Pads for Performance

To achieve the best performance from your Shimano BR-R8170, make sure the brake levers are set up to your liking, and the brake pads are optimally configured:

Adjusting the Lever Reach

The Shimano BR-R8170 has an adjustable lever reach feature, which allows you to customize the lever position for comfort and control. This is particularly helpful for riders with smaller hands or those who prefer a particular lever position.

1. Adjust the Reach: Use the tool provided with the brakes or a small allen wrench [paid link] to adjust the reach screw on the brake lever. Turn the screw clockwise to move the lever closer to the handlebar or counterclockwise to move it further away.
2. Test the Lever Feel: After adjusting, test the lever feel by squeezing it. Ensure that the lever provides a firm, responsive feel without being too far or too close to the handlebar.

Optimizing Brake Pad Compound

Different riding conditions may call for different brake pad compounds. The Shimano BR-R8170 is compatible with a range of Shimano brake pads, including resin and metal options.

1. Choose the Right Pad Compound: For road riding, resin pads tend to be quieter and provide better modulation, especially in dry conditions. For wetter or more demanding riding conditions, metal pads offer increased durability and better braking performance in wet conditions.
2. Break-in the Pads: After installing new pads, perform a break-in period to condition the pads. Gently apply the brakes in a series of stops from moderate to slow speeds, gradually increasing the intensity of the braking to properly seat the pads.

Maintaining Hydraulic Fluid

Hydraulic fluid is crucial to ensuring consistent braking performance. The Shimano BR-R8170 uses Shimano’s proprietary Mineral Oil [paid link], which is both efficient and safe for the system. Regular fluid checks and replacements will help maintain smooth brake operation.

1. Check Fluid Levels: Regularly check the brake fluid levels through the reservoir. If the fluid level [paid link] is low, top it up with Shimano Mineral Oil [paid link]. Do not overfill the reservoir, as this can cause spillage or interference with brake lever movement.
2. Replace Fluid: If your brakes feel spongy even after bleeding, it may be time to replace the hydraulic fluid completely. This can help clear out any air bubbles or contamination that could be affecting performance.

Storing and Caring for Your Shimano BR-R8170 Disc Brakes

Proper storage and care will help ensure your Shimano BR-R8170 brakes perform well for years. When storing your bike, especially during the off-season, take the following precautions:

1. Store in a Dry Place: Avoid storing your bike in excessively humid or wet environments. Moisture can lead to rust on the rotors and corrosion within the hydraulic system.
2. Protect the Brakes from Impact: Avoid any impacts to the brake levers or calipers that could cause damage or misalignment.
3. Inspect Before Riding: Before each ride, perform a quick visual inspection to ensure the rotors are straight, the pads are in good condition, and the brake fluid levels are optimal.

Conclusion

The Shimano BR-R8170 disc brakes offer exceptional performance, but like all components, they require regular maintenance to continue delivering their best results. By following these maintenance and adjustment guidelines, you can maximize the lifespan and efficiency of your brakes, ensuring a smooth and safe ride every time you hit the road.