If aerodynamics are as important as braking performance, the Shimano Ultegra BR-RS811-R Direct Mount Brake – mounted under the bottom bracket is the optimal choice.
THE SCIENCE OF SPEED: Shimano Ultegra Direct-Mount Brake Caliper BR-RS811-R
Great speed means great responsibility. That’s why, faced with the task of making the new ULTEGRA groupset even faster, Shimano decided to take a holistic and 100% performance-focused approach. Shimano’s new 12-speed road groupset delivers unparalleled control and comfort anytime, anywhere – whether you’re competing in an amateur race, chasing your personal best, or out for a social ride. That is “Science of Speed”. And it’s what sets SHIMANO apart from the rest.
The Dual-pivot or Direct Mount type rim brake calipers bring incredibly powerful performance, offering the best balance between rigidity, weight and stopping power, providing a sleek design, bringing better clearance for tires up to 28C. Direct mount options provide integrated aerodynamic designs at the front (BR-R8110-F) and on the rear seat stay (BR-R8110-RS) or under the bottom bracket (BR-RS811-R).
Features – Shimano ULTEGRA BR-RS811-R Direct-Mount | brake pad standard for aluminium rim
- More predictable, linear braking curve
- Rear – Direct Mount Chain Stay (Bottem Bracket)
- Narrower gap between arms
- Clear contact feeling with balanced rigidity, weight and stopping power
- Sleek design
- Wider clearance with larger tire sizes
- Compatible with 28C tire size
- SLR-EV technology
Product features
- Use: Road, Triathlon
- Group: Ultegra R8100
- Model: BR-RS811-R
- Type: Rear – Direct Mount Chain Stay (Bottem Bracket)
- Assembly pivot nut: Direct Mount
- Brake shoe: R55C4 (standard for aluminum rim)
- Reach: 51mm
- Technology: SLR-EV
- Rim width: 20.8-28mm
- Maximum tire size: 28mm
- Reference brake lever: ST-R8150
Material
- Aluminum anodized
Color
- Series color
Scope of delivery
- 1 x Shimano Ultegra BR-RS811 Direct-Mount Brake Caliper rear
Technology
SLR-EV is brand new SLR with dual symmetric pivot brake caliper. The short-arm brake design employs two bearings and a roller to realize greater efficiency in the pivot area and deliver superior modulation and power for braking. Together with the BC-9000 brake cable, the new calipers deliver 36% more braking power than SHIMANO’s previous brake model. And we offer 2 axle symmetric brake caliper and fork mount and chain stay mount type.













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