How to Properly Maintain Your Shimano BR-R7170 Disc Brakes for Maximum Stopping Power

Posted on
in No category

The Shimano BR-R7170 [paid link] disc brakes are known for their superior stopping power and durability, making them a popular choice for road cyclists. However, like any high-performance component, they require proper maintenance to ensure they continue to perform optimally. This guide covers essential maintenance tips for keeping your Shimano BR-R7170 [paid link] disc brakes in top condition, ensuring maximum stopping power and longevity.

Regular Cleaning and Maintenance

Cleaning the Brakes

One of the most important steps in maintaining your Shimano BR-R7170 [paid link] disc brakes is regular cleaning. The brake pads and rotors can accumulate dirt, grime, and brake fluid, which can compromise their performance. To clean the system effectively, follow these steps:

  1. Remove the wheels to give yourself clear access to the brake pads and rotors.
  2. Clean the rotors using a clean, lint-free cloth dampened with isopropyl alcohol (preferably 70% or higher). Gently wipe both sides of the rotor to remove any contaminants. Be careful not to touch the rotors with your bare hands, as oils from your skin can affect braking performance.
  3. Clean the brake pads by using a cloth to wipe away any debris. For stubborn dirt, lightly sand the pads with fine-grit sandpaper. This helps to remove any glazing and maintain proper contact with the rotor.
  4. Inspect for wear: After cleaning, inspect both the brake pads and the rotors for any signs of excessive wear. If the pads are worn down to the indicator line, they should be replaced to ensure optimal braking.

Lubricating Moving Parts

The Shimano BR-R7170 brakes feature a mechanical actuation system. To keep the moving parts functioning smoothly, you should periodically lubricate the contact points. Use a lubricant designed specifically for bicycle components, and apply a small amount to the following areas:

  • Brake arm pivots
  • Cable contact points
  • Threaded areas (e.g., bolt threads)

Avoid over-lubricating as excess grease can attract dirt, leading to faster wear and reduced braking performance.

Checking Brake Pad Alignment

Proper brake pad alignment is essential for maximum stopping power and preventing uneven wear. Misaligned brake pads can cause the brakes to feel weak or pull to one side. Here’s how to ensure your Shimano BR-R7170 pads are properly aligned:

  1. Check the pad position: When the brake is engaged, the pads should be parallel to the rotor and should not make contact with the rotor’s sidewalls. If the pads are not aligned properly, loosen the brake pad mounting bolts slightly.
  2. Adjust the position: Move the pads so they are centered on the rotor and parallel to it. Tighten the bolts to secure the pads in the correct position.
  3. Test the alignment: After adjusting, spin the wheel to ensure the rotor spins freely without rubbing against the brake pads. If there is rubbing, you may need to make further adjustments to the pad position or rotor alignment.

Maintaining Hydraulic System (If Applicable)

If you have the hydraulic version of the Shimano BR-R7170, regular maintenance of the hydraulic system is necessary for smooth and reliable braking performance. The main task is to ensure there are no air bubbles in the brake lines and that the fluid is at the correct level [paid link].

  1. Check brake fluid levels: Shimano recommends inspecting the brake fluid levels at regular intervals, especially before long rides. If the fluid is low, it can cause spongy brakes, reducing performance.
  2. Bleed the brakes: If you experience reduced braking power or feel air in the brake lever, it may be time to bleed the system. This process removes any air bubbles from the hydraulic lines and replaces the fluid. It’s best to use Shimano’s specific mineral oil [paid link] for this task.
  3. Inspect brake hoses for damage: Check the hydraulic hoses for any signs of cracks, abrasions, or leaks. If any damage is found, replace the hose immediately to prevent brake failure.

Rotor Care

The rotor is a critical component for braking efficiency, and it’s essential to keep it in good condition. Here are key rotor care tips for the Shimano BR-R7170:

  1. Check rotor wear: Over time, the rotor can wear down due to friction with the brake pads. Shimano recommends replacing the rotor when it reaches a thickness of 1.5mm or less. A thinner rotor compromises braking power and can result in dangerous brake fade.
  2. Check for warping: If you experience inconsistent braking or vibrations, the rotor may be warped. To check for warping, spin the wheel and observe if the rotor wobbles side to side. If there’s significant warping, the rotor should be replaced.
  3. Clean the rotor: In addition to regular cleaning, inspect the rotor for any grooves or damage. A damaged rotor can cause uneven braking and excessive pad wear. If the rotor is heavily worn, it may need to be replaced.

Brake Lever Maintenance

Proper maintenance of your Shimano BR-R7170 brake levers is essential for consistent braking performance. While the brake levers themselves don’t require much maintenance, you should check for the following:

  1. Lubricate the pivot points: If the levers feel stiff or sticky, lubricate the pivot points with a small amount of bike-specific lubricant.
  2. Check the brake lever feel: If the lever feels too spongy or doesn’t return to its original position after braking, it could indicate an issue with the hydraulic fluid or brake pads. In this case, a brake bleed may be required.
  3. Inspect for cracks or damage: Over time, lever bodies can develop cracks or signs of wear. If you notice any significant damage, replace the brake levers immediately to avoid potential brake failure.

General Troubleshooting Tips

Even with proper maintenance, issues can arise with your Shimano BR-R7170 disc brakes. Here are a few common problems and how to solve them:

Weak Braking Power

If you notice weak braking performance, it may be due to:

  • Brake pad wear: Check the pads and replace them if they are too worn.
  • Hydraulic issues: For hydraulic models, low brake fluid levels or air bubbles in the brake line can cause weak braking. Perform a brake bleed to resolve these issues.

Noisy Brakes

If your brakes are making a squealing or grinding noise, it could be due to:

  • Contaminated pads or rotor: Clean the pads and rotor with isopropyl alcohol to remove any grease, oil, or debris.
  • Improper pad alignment: Check the alignment and ensure that the pads are parallel to the rotor.

Brakes Pulling to One Side

If your brakes pull to one side during braking, this can be caused by:

  • Uneven brake pad wear: Check the wear pattern on your brake pads and replace them if necessary.
  • Misaligned pads: Adjust the position of the brake pads to ensure even contact with the rotor.

Conclusion

Maintaining your Shimano BR-R7170 disc brakes is essential to ensure they provide reliable stopping power and long-lasting performance. Regular cleaning, adjusting brake pad alignment, checking hydraulic fluid levels, and inspecting rotors for wear will help keep your brakes in optimal condition. By following the maintenance steps outlined in this guide, you can maximize the performance and longevity of your Shimano BR-R7170 disc brakes, ensuring a safe and smooth ride every time.