The Shimano BR-R8170 [paid link] is one of the most advanced hydraulic disc brakes designed for road cycling, offering superior stopping power, modulation, and reliability. As with any high-performance component, cyclists often ask whether they can upgrade their Shimano BR-R8170 [paid link] disc brakes, either for better performance or compatibility with other components. In this guide, we’ll explore the compatibility of the BR-R8170 [paid link] with different drivetrains, best practices for upgrading, and key considerations to ensure optimal braking performance.
Understanding Shimano BR-R8170 Disc Brakes
The Shimano BR-R8170 is part of Shimano’s 11-speed and 12-speed Di2 hydraulic disc brake series, designed for high-performance road bikes. It features hydraulic calipers and the benefits of Di2 integration, making it an ideal choice for serious cyclists seeking precise braking and improved modulation.
One of the key benefits of the BR-R8170 is its integration with Shimano’s electronic shifting systems. It allows for seamless brake adjustments through the Di2 interface, offering a responsive and customizable braking experience. Whether you’re a competitive rider or a weekend enthusiast, upgrading to the BR-R8170 can be a worthy investment to enhance your overall riding experience.
Compatibility Considerations for Upgrading to BR-R8170 Disc Brakes
Before upgrading to the Shimano BR-R8170 disc brakes, it’s essential to consider several compatibility factors to ensure your bike’s drivetrain and braking system are ready for the new setup. Here’s what you need to check:
1. Brake Mount Standards
The Shimano BR-R8170 disc brakes are designed for flat-mount disc brakes, a standard commonly found on modern road bikes. Ensure your frame and fork are compatible with this mount style. If your bike uses a post-mount standard, you may need an adapter to install the BR-R8170 brakes correctly.
2. Rotor Size Compatibility
The BR-R8170 is compatible with Shimano’s RT-MT800 and RT-MT900 rotors, which come in various sizes, such as 140mm, 160mm, 180mm, and 203mm. Ensure that your bike’s frame and fork can accommodate the desired rotor size. Larger rotors generally provide better braking power and heat dissipation but may require additional clearance.
3. Hydraulic Brake System
The Shimano BR-R8170 uses hydraulic brake fluid, so you need to ensure that your bike’s frame and fork are equipped to handle hydraulic brakes. If you’re replacing a mechanical disc brake setup, you will need to replace the entire brake system, including the levers, calipers, and hoses, to integrate the BR-R8170.
4. Di2 Compatibility
One of the standout features of the BR-R8170 is its compatibility with Shimano’s Di2 electronic shifting system. If you already have a Di2 setup, the upgrade to BR-R8170 brakes will be seamless. However, if you don’t have Di2, you will need to install the full system, including the shifters, wiring, and battery, which can be a more complex upgrade.
5. Wheel and Hub Compatibility
To accommodate the BR-R8170 disc brakes, your wheels must be equipped with disc brake hubs. Ensure that your current wheelset is compatible with the disc rotors used by Shimano. If not, you will need to invest in a new wheelset designed for hydraulic disc brake systems.
Best Practices for Upgrading Shimano BR-R8170 Disc Brakes
Upgrading to the Shimano BR-R8170 can dramatically improve your braking performance. However, to get the most out of your new brakes, it’s essential to follow best practices during installation and adjustment.
1. Ensure Proper Brake Bleeding
Before installing the BR-R8170, it’s essential to bleed the hydraulic brake lines properly. Shimano uses its Mineral Oil [paid link] fluid for hydraulic brakes, and bleeding ensures there are no air bubbles in the system, which can affect brake performance. If you’re unfamiliar with the bleeding process, it’s recommended to have a professional mechanic do the job, as improper bleeding can result in poor braking performance.
2. Install the Correct Size Rotors
The rotor size you choose for your Shimano BR-R8170 system depends on your riding style, bike frame, and desired braking power. For most road cyclists, a 160mm rotor offers excellent performance, while riders who frequently tackle hilly terrain may prefer a larger 180mm or 203mm rotor for better heat management and braking power.
3. Torque Specifications
When installing the Shimano BR-R8170, always adhere to Shimano’s torque specifications for the caliper, rotor, and lever mounting bolts. Over-tightening or under-tightening bolts can lead to poor brake alignment, noise, or even damage to the components.
4. Use Shimano Rotors and Brake Pads
For the best performance and longevity, always use Shimano-approved rotors and brake pads with your BR-R8170 system. Shimano designs its braking components to work together, ensuring smooth operation and optimal braking power. Using non-SRAM or third-party components can compromise performance and lead to uneven pad wear or increased braking noise.
5. Check Alignment Regularly
Proper rotor alignment is crucial for optimal braking performance. After installing your Shimano BR-R8170 system, make sure the calipers are centered over the rotors. Use a truing tool to check for any rotor warping, which can cause inconsistent braking and noise. Regularly check your rotor alignment, especially after long rides or bike crashes.
Upgrading vs. Replacing Your Shimano BR-R8170 Disc Brakes
Upgrading to the Shimano BR-R8170 doesn’t always mean replacing an existing brake system. In some cases, it might simply mean replacing worn-out components like rotors, pads, or hydraulic lines. However, if you are looking to switch from a mechanical disc brake system or a non-Shimano system, upgrading to the BR-R8170 may require replacing your entire braking setup, including the levers and calipers.
Upgrading to the BR-R8170 system from an older Shimano model, such as the BR-RS785 or BR-R685, will give you a noticeable improvement in braking performance due to the enhanced modulation and Di2 integration. However, if you are upgrading from a non-Shimano system, compatibility issues are more likely to arise, so it’s essential to consider your bike’s current setup and the cost of transitioning to the new system.
Conclusion
Upgrading to the Shimano BR-R8170 disc brakes is a great way to enhance your bike’s braking performance and take advantage of the latest hydraulic braking technology. However, it’s important to carefully consider compatibility factors such as brake mount standards, rotor size, and Di2 integration. By following the best practices outlined in this guide, you can ensure that your upgrade goes smoothly and your BR-R8170 brakes perform at their best. Whether you’re replacing an old system or building up a new bike, the Shimano BR-R8170 offers a superior braking experience for serious cyclists.