Shimano ST-RX825 + BR-RX820 + Hose Rear Disc Brake Kit – Wireless, 2 Pistons
The Shimano ST-RX825 + BR-RX820 Rear Disc Brake Kit represents the evolution of control and precision for next-generation gravel and road bikes.
This system integrates a 2-piston hydraulic disc brake with a wireless shift/brake lever, offering high performance, clean design, and minimal maintenance.
Thanks to SHIMANO Di2 wireless technology, gear shifts are faster, smoother, and more reliable, with a tidy cockpit and no visible cables. The BR-RX820 caliper guarantees powerful and quiet braking, while the ergonomics of the ST-RX825 lever offer superior comfort and control even on mixed terrain.
Main features
Pad distance increased by 10%:
Reduces brake noise and improves heat dissipation, ensuring quieter and more consistent braking.
Low-maintenance bleeding procedure:
Hydraulic system optimized for easy maintenance and quick bleeding.
Clean cockpit with wireless gear shifting:
The Di2 wireless system offers a minimalist and modern look, ensuring fast, precise, and reliable shifting.
Long battery life:
From 3 to 4 years of autonomy thanks to CR1632 batteries, easy to replace, for an uninterrupted riding experience.
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Greater comfort and control on mixed terrain:
Ergonomic levers with specific coating and handguards ensure secure grip and optimal stability even on the most challenging sections.
Non-slip coating on brake levers: consistent grip even with wet hands or gloves.
Raised handguards with sculpted surface: better protection and handlebar control.
Optimization for flare handlebars: specific design for gravel use, improving comfort and ergonomics.
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Customizable gear shift settings:
The Di2 system allows you to configure the controls according to your riding preferences.
Compatible with SHIMANO SW-RS801 satellite shifters (three options available).
Includes the SHIMANO FRONT SHIFT NEXT function, to control the front derailleur quickly and intuitively.
Technical specifications
Brake type: hydraulic disc, 2 pistons
Included components: ST-RX825 (brake lever + wireless shifter), BR-RX820 (brake caliper), hose
System: SHIMANO Di2 wireless
Position: rear
Pad spacing increase: +10% compared to previous models
Maintenance: easy bleeding and low maintenance
Shift control batteries: CR1632 (3–4 years battery life, easily replaceable)
Handlebar compatibility: optimized for flare handlebars
Accessory compatibility: SHIMANO SW-RS801 (3 variants)
Shift function: SHIMANO FRONT SHIFT NEXT
Main advantages
Rear brake powerful, quiet, and reliable
Fast and stable wireless shifting with Di2 technology
Clean and modern design thanks to the absence of visible cables
Reduced maintenance and long battery life
Optimal ergonomics for comfort on mixed terrain
Extended compatibility with SHIMANO accessories and controls
