Shimano GRX ST-RX820 Dropper Post STI Lever With BR-RX820 Flat Mount Caliper

Shimano GRX, with its gravel specific ergonomics, optimized gearing options, rugged reliability, and quiet and stable drivetrain, sets itself apart from the rest of the component world.

The Shimano RX820-LA Dual Control Lever integrates the brake lever and dropper post lever into one seamless unit that delivers fast and effortless operation, and a cleaner, more streamlined cockpit.

Technology

ServoWave Action

When you pull a ServoWave brake lever, initial pad travel is fast, so little lever movement is needed to bring the pads into contact with the rotor. The power multiplication factor then increases rapidly at the pad-to-rim contact so more of the lever stroke is used to apply greater braking power with improved control.

Reach Adjust

Brake lever is equipped with a reach adjust mechanism. The distance from handlebar grip to lever can be adjusted to suit any hand size, type of riding and individual rider preferences.

Ice Technologies

The fade, which can occur to disc brake rotor and pad when braking on a long downhill ride for instance, has a negative impact on the braking performance. Shimano has adopted Ice Technologies disc brake rotor and Ice Technologies pad to realize the cooling technology for consistent performance. The clad disc brake rotor blade, which has a 3 layer-sandwich structure of stainless steel, aluminum and stainless steel, provides better radiation performance. Also, the radiation fin has been adopted for the pad. Moreover, the clad disc brake rotor blade and the radiator fin provide long pad life, less noise, less fade and lightweight.

Ice Technologies piston in order to achieve optimised lightweight, high rigidity and heat dissipation. Oversized pistons transfer hydraulic power directly to the brake pad, and ceramic material is used to avoid heat transfer for constant stable braking, providing efficient stopping power transfer without loss.

One Way Bleeding

“One Way Bleeding” was developed for quick and easy prevention of air in our hydraulic system. We have streamlined the oil route throughout the system to prevent air bubbles from being captured in the system.

One way oil routing plus a funnel tool with mineral oil provides an easy and clean bleeding system.

Features

• GRX hydraulic disc brake levers give you control, modulation and power with minimal effort in all riding conditions
• Disc brake lever with dropper seatpost operation
• Raised hood head prevents hand misalignment and slippage
• Anti-slip texture and brake lever coating gives higher braking efficiency and reduces fatigue on long rides
• Kit contains bled left hand ST-RX820-LA STI, BR-RX820 flat mount rear brake calliper with pads, hose and mineral oil (without rotor or adapter)