SHIMANO BR-6800-R Ultegra Rear Brake Slr Dual Pivot Caliper 689228288287 51MM Road Bike

( Brand: Shimano ), ( Manufacturer Part Number: BR-6800-R ), ( Part Type: Bike ), ( Brake Type: Rim Brake ), ( UPC: 689228288287 )

Review SHIMANO Ultegra Rear Brake Slr Ev Dual Pivot Caliper 51mm Road Bike

The **Shimano BR-6800-R Ultegra Rear Brake SLR Dual-Pivot Caliper (51mm)** is a high-performance, precision-engineered braking system designed to deliver exceptional stopping power, modulation, and durability for road cyclists demanding the finest in Shimano s Ultegra lineup. Engineered with the latest advancements in braking technology, this dual-pivot caliper represents a significant leap forward in both efficiency and rider control, making it an ideal choice for competitive racers, gravel enthusiasts, and serious recreational riders who prioritize performance without compromise. The **SLR (Shimano Low-Rotation) design** minimizes rotational inertia, allowing for quicker, more responsive braking with reduced pedal kickback a critical advantage in high-speed descents or aggressive cornering. This innovation ensures that every lever pull translates into immediate, predictable stopping power, enhancing both safety and confidence on the bike.

Built with **high-grade aluminum alloy**, the BR-6800-R features a robust yet lightweight construction that maintains stiffness while reducing unsprung mass, contributing to a more agile and efficient ride. The **dual-pivot mounting system** provides superior stability and alignment, reducing brake pad wear and ensuring consistent braking performance even under heavy loads or prolonged use. Shimano s **Hydraulic Disc Braking (HDB) compatibility** means this caliper pairs seamlessly with the **Ultegra Hydraulic Disc Brake System**, offering linear, progressive modulation and superior heat dissipation key factors in maintaining control during repeated hard stops or downhill descents. The **51mm rotor clearance** accommodates standard 160mm rotors, striking a balance between stopping power and weight, while the **adjustable pad tension and lateral positioning** allow for precise fine-tuning to match individual riding style, tire width, and environmental conditions.

Under the hood, the BR-6800-R incorporates **Shimano s advanced brake pad technology**, featuring **organic or sintered pad options** (depending on the model variant) that deliver optimal grip across a wide range of temperatures and surface conditions. The **self-adjusting brake mechanism** ensures consistent pad-to-rotor contact, reducing the need for frequent manual adjustments, while the **durable rubber seals and corrosion-resistant coatings** enhance longevity and reliability in all weather conditions. Whether tackling wet trails, dusty gravel, or slick pavement, this caliper maintains its performance, thanks to its **sealed internal components** that protect against debris and moisture intrusion. The **sleek, aerodynamic design** not only reduces drag but also integrates seamlessly with modern frame and fork designs, offering both form and function.

For riders upgrading from mechanical disc brakes or seeking the ultimate in hydraulic braking precision, the **BR-6800-R Ultegra Rear Caliper** represents a benchmark in braking technology. Its **superior modulation, reduced pedal kickback, and robust build** make it a standout choice for those who refuse to settle for anything less than the best. Whether used in tandem with the **Ultegra Di2 hydraulic system** for seamless electronic shifting or paired with a mechanical setup for a more traditional feel, this caliper ensures that every brake application is both powerful and controlled. With Shimano s reputation for innovation and reliability, the BR-6800-R is not just a component it s a performance-enhancing upgrade that elevates the entire riding experience.

The **Shimano BR-6800-R (Ultegra SL-R Dual Pivot Caliper, 51mm)** is a high-end road brake caliper designed for performance-oriented cyclists. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros**

1. **Premium Performance**

The BR-6800-R is part of Shimano s Ultegra lineup, which is known for delivering exceptional braking power, modulation, and consistency. It features a dual-pivot design, which improves lever feel and reduces brake pad wear compared to single-pivot systems. The larger 51mm rotor clearance allows for better heat dissipation and longer pad life, especially in demanding conditions.

2. **Lightweight Construction**

The caliper is made from lightweight aluminum, reducing unsprung mass and improving wheel responsiveness. This is particularly beneficial for climbers and sprinters who prioritize efficiency.

3. **Ultegra-Level Reliability**

Shimano s Ultegra components are renowned for their durability and low maintenance requirements. The BR-6800-R is no exception, offering smooth operation and minimal issues over time, especially when paired with compatible brake pads (e.g., Shimano s CS-5100 or CS-5200).

4. **Compatibility with High-End Systems**

The BR-6800-R is designed to work seamlessly with other Ultegra components, including levers (e.g., SL-R7000 or SL-R6000), rotors, and cables. This ensures a cohesive braking system with optimized feel and performance.

5. **Dual-Pivot Advantages**

The dual-pivot design reduces brake lever "chatter" and improves modulation, making it easier to apply precise braking pressure. This is particularly useful for aggressive riders who need quick, controlled stops.

6. **Heat Dissipation**

The larger 51mm rotor clearance allows for better airflow, reducing brake fade in long descents or heavy braking scenarios. This is a significant advantage over smaller rotors or older single-pivot designs.

7. **Aesthetic Appeal**

The BR-6800-R features a sleek, modern design that complements high-end road bikes. Its finish and build quality reflect Shimano s attention to detail, making it a visually appealing choice for riders who value both performance and aesthetics.

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### **Cons**

1. **Cost**

The BR-6800-R is significantly more expensive than entry-level or mid-range brake calipers (e.g., Shimano s BR-R3000 or SRAM s A11). For casual riders or those on a budget, the price may not justify the performance gains.

2. **Overkill for Light Use**

If you primarily ride on smooth roads with minimal braking demands, the BR-6800-R s advanced features may not be necessary. A more affordable caliper (e.g., Ultegra SL-R5000 or even Tiagra) could suffice without sacrificing much performance.

3. **Maintenance Sensitivity**

High-end brakes like the BR-6800-R require proper maintenance to perform optimally. This includes regular pad replacement, rotor truing, and cable/housing cleaning. Neglecting maintenance can lead to inconsistent braking or premature wear.

4. **Weight Sensitivity**

While the BR-6800-R is lightweight, it is heavier than some carbon or ultra-lightweight alternatives (e.g., SRAM s Force or some aftermarket calipers). For riders who prioritize every gram, this may be a minor drawback.

5. **Compatibility Limitations**

The BR-6800-R is designed specifically for Shimano s Ultegra system. If you mix components (e.g., pairing it with a different lever or rotor brand), you might encounter slight inconsistencies in feel or performance. This is less of an issue if you stick to Shimano s ecosystem.

6. **Potential Overkill for Gravel or Hybrid Use**

While the BR-6800-R is excellent for road cycling, its performance may not be fully utilized on gravel or hybrid bikes, where braking demands are often less intense. In such cases, a more versatile (but slightly less premium) caliper might be a better fit.

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### **Conclusion**

The **Shimano BR-6800-R Ultegra SL-R Dual Pivot Caliper** is one of the best brake calipers available for road cycling, offering unmatched performance, reliability, and refinement. It is ideal for serious cyclists whether they are racers, time trialists, or aggressive recreational riders who demand the best braking system available. The dual-pivot design, lightweight construction, and compatibility with other Ultegra components make it a top-tier choice for those willing to invest in a premium setup.

However, the high cost and the fact that it may be overkill for lighter use cases mean it is not the best fit for casual riders or those on a tight budget. If you are building a high-end road bike or upgrading an existing one with Ultegra components, the BR-6800-R is an excellent investment. For everyone else, a slightly more affordable option (e.g., Ultegra SL-R5000 or Tiagra) might provide a better balance of performance and value.

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### **Recommendation**

- You are building a high-performance road bike with Ultegra components.

- You prioritize braking power, modulation, and durability in demanding conditions.

- You are willing to invest in a premium braking system for racing or aggressive riding.

- You plan to pair it with other Ultegra parts (levers, rotors, cables) for a cohesive setup.

- You are on a budget and can achieve similar performance with a slightly less expensive caliper (e.g., Ultegra SL-R5000 or SRAM Force).

- You primarily ride on smooth roads or in light conditions where top-tier brakes are unnecessary.

- You are mixing components from different brands and want a more versatile (but slightly less refined) option.

For most serious road cyclists, the **BR-6800-R is a fantastic choice** it delivers the performance and feel expected from Shimano s Ultegra lineup and is worth the investment for those who demand the best.

Details:

This dual pivot caliper brake features a 51mm rim design, providing efficient and responsive braking power. The Shimano Ultegra BR-6800-R Rear Brake is a high-quality bicycle component designed for road bikes. Known for its durability and precision, this Shimano rear brake is a popular choice among cyclists looking to enhance their performance on the road.

part #: br6800 prices

• $58.00-$146.89

specifications ribicycl:

• brand: Shimano
• mpn: Br-6800-r
• part type: Bike
• brake type: Rim Brake
• upc: 689228288287

offer ribicycl:

• availability: In Stock
• quantity: 1
• started: March 13, 2026
• sold: 0
• options: Ship-to-home

general ribicycl:

• condition: Used
• Cycling > Bicycle Components Parts > Brakes

shipping ribicycl:

• class: Standard
• cost: $5.99
• transit: 5-12 Days
• service: USPS Ground Advantage
• carrier: USPS
• type: Fixed

payments ribicycl:

• credit card: Diners-club
• wallet: Google-pay
• money order
• other

seller ribicycl:

• city: Paicines, California
• rating: 98.8%
• # reviews: 163

returns ribicycl:

• policy: No Returns

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