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SKU: HBSL0234

Shimano GRX BL-RX820 Hydraulic Disc Brake Lever & BR-RX820 Flat Mount Caliper - Responsive 2-Piston Gravel Bike Brake System with SERVO WAVE, Adjustable Reach, Anti-Slip Coating, Heat- Dissipating Resin Pads, for Mixed-Terrain & Gravel Cycling

Regular price $424.75
$461.95 Sale price $424.75 Regular price
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Description
Specifications

Experience superior control and unmatched performance with the Shimano GRX BL-RX820 Hydraulic Disc Brake Lever paired with the BR-RX820 Flat Mount Caliper - the ultimate combination for gravel, cyclocross, and mixed-terrain riding. Designed for durability, precision, and comfort, this high-performance hydraulic braking system is engineered to elevate your cycling experience across challenging terrains.

Premium Materials & Innovative Engineering

Constructed with lightweight yet robust materials, the Shimano GRX RX820 lever features a textured, anti-slip hood that ensures optimal grip even in wet, muddy, or sweaty conditions. The inclusion of finned L05A resin pads enhances heat dissipation, allowing for consistent braking performance during extended descents. The flat mount caliper is engineered with a 2-piston design and 10% wider pad clearance, reducing brake noise while providing smooth modulation and precise stopping power.

Advanced Components & Technology

Equipped with Shimano's SERVO WAVE technology, this system delivers rapid pad-to-rotor engagement, providing immediate response and increased braking force on demand. The hydraulic system uses mineral oil for clean, efficient operation and includes a one-way bleeding process, simplifying maintenance and ensuring reliable performance over time. The caliper's compact design results in a quieter operation and easier installation, ideal for gravel grinders and adventure riders.

Performance & Handling

The BL-RX820 lever boasts an adjustable reach mechanism, accommodating various hand sizes and riding styles for personalized comfort. Its ergonomic design decreases pressure on your palms during long rides, while the textured surface guarantees confident control on bumpy descents. Compatible with Shimano's 12-speed drivetrain and road shifters, this setup guarantees seamless integration and precise modulation when descending or navigating technical terrain.

Style & Use Case

Perfect for gravel cyclists, cyclocross racers, and adventure riders, this hydraulic disc brake system combines a sleek aesthetic with high functionality. The system is optimized for use with flared handlebars and is designed for trailblazing performance in all weather conditions, whether you're tackling wet descents or muddy trails.

Key Features:

- Left/Front hydraulic brake lever with textured hood for enhanced grip

- Flat mount 2-piston caliper with improved modulation and reduced noise

- Finned resin pads for superior heat dissipation

- Adjustable reach for personalized fit and comfort

- Compatible with 140/160mm rotors (rotor sold separately)

- One-way, maintenance-friendly hydraulic bleeding system

- Optimized for gravel, cyclocross, endurance riding, and mixed terrain

Upgrade your bike with the Shimano GRX RX820 hydraulic disc brake system for exceptional stopping power, reliable modulation, and all-weather control. Dominate diverse terrains with confidence - engineered for adventurers who demand precision and durability in every ride.

  • Lightweight, corrosion-resistant aluminum construction ensures durability and reliability in all-weather gravel riding conditions.
  • Engineered with Shimano's SERVO WAVE technology, providing rapid initial pad contact and increased braking force for confident descents on mixed terrain.
  • Advanced 2-piston hydraulic disc brake caliper features wider pad clearance for quieter operation and reduced brake squeal, ideal for gravel and adventure cycling.
  • Ergonomic, textured brake levers with adjustable reach and anti-slip coating enhance rider control and comfort, even during wet, muddy, or bumpy rides.
  • Compatible with flat mount frames and equipped with finned resin pads for improved heat dissipation, making this system optimal for demanding gravel adventures and race scenarios.
Brake Lever ActuationHydraulic
Rotor IncludedNo
Brake Caliper MountFlat Mount
Brake Lever UseLeft
Drivetrain Speeds12
Front Der/Shifter CompatibilityShimano Road
Shifter/Derailleur CompatibilityShimano
Hydraulic Fluid TypeMineral Oil
Pad CompoundResin
Hydraulic Hose Length1000
Adjustable ReachYes
Adjustable Contact PointYes
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We pride ourselves on our ability to ship and deliver your gear with excessive speed! We ship from 22 locations throughout the United States and most orders will arrive in 3 days or less with Free Shipping on orders over $75!

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Most orders placed during the workweek before 1:00 PM Eastern time ship the same day, but during peak/holiday season or depending on inventory location handling time can take up to 48 hours. If you have questions regarding shipping estimates, don't hesitate to get in touch with us before placing the order. There is a direct signature requirement for all orders over $500.

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365 Cycles puts the customer above everything. Our number one goal is your satisfaction. When you press the shift lever you want the gears to shift, and when you buy bicycle parts, you want the bicycle parts to arrive on time in new condition. With over 60,000 products and 22 warehouse locations throughout the country, we have the parts you need and they are coming in hot!

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If there is ever an issue with an order we will work at warp speed to fix our mistake and make sure you never go a day without a bicycle! If you are not receiving the quality of service you need from one of our exceptionally qualified bicycle experts, tell them Ben Berman told you to tell them "Customer Loyalty" and then name your terms.

Our team is waiting to help you 7 days a week and they are more qualified to help than I am but if you ever feel like you're not getting the service you need I’m personally asking you to email me at ben@365cycles.com with "CUSTOMER LOYALTY" in the title and I will personally handle your order.

Over the years we have served millions of satisfied customers and continue to serve many of them today. With your feedback, we are confident we can take this lifelong journey together and build a friendship that goes beyond parts and accessories.

“If you want to go fast, go alone, if you want to go far, go together.” -Someone Smart

Ben Berman Founder & CEO of 365 Cycles


Company Core Values: 

These were established by the members of our team and we use them every week to call out team members who have shined in one of these areas. Feel free to let us know at info@365cycles.com if someone you worked with has gone above and beyond in one of these areas. 

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