Shimano GRX ST-RX825

Wireless Di2 Precision. Gravel-Tuned Ergonomics.

The engineering breakthrough of the Shimano GRX ST-RX825 Levers is their gravel-optimized hood architecture. Featuring a raised hood peak, textured anti-slip surface, and a flared body shape, these levers are custom-molded to fit naturally into your palms when riding flared gravel handlebars. Powered by Shimano's proven wireless Di2 technology, the RX825 levers eliminate shift wires running through the handlebars, creating a clean cockpit while providing tactile, configurable shift buttons that operate flawlessly even when caked in mud or navigated with full-finger winter gloves.

Why the GRX ST-RX825 Belongs in Your Gravel Cockpit:

• Wireless 2x12Speed Di2 Shifting: Secure wireless protocol delivers lightning-fast, ultra-accurate front and rear derailleur shifts with zero gear cables to stretch or contaminate over time.

• Redesigned Gravel Hood Ergonomics: Raised head profile prevents your hands from sliding forward during heavy impacts, while the curved body contours seamlessly with flared gravel drop bars.

• Anti-Slip Hood Coating: Specialized ribbed texturing provides maximum hand traction and shock absorption on rough chatter, whether riding wet, muddy, or bare-handed.

• Servo Wave Hydraulic Braking: Re-engineered brake lever pivot points and Servo Wave technology deliver faster pad engagement, precise lever modulation, and light 1-finger braking force from either the hoods or the drops.

• Configurable Third Hood Buttons: Integrated auxiliary buttons on top of the hood horns can be programmed via the E-TUBE PROJECT app to shift gears, operate compatible bike computers, or trigger lap timers.

• Extended Battery Life: Powered by easy-to-replace CR1632 coin cell batteries inside each hood, offering up to 3.5 years of reliable wireless operation before replacement.

Technical Specifications:

• Series: Shimano GRX RX820 / RX825 Di2 Series

• Drivetrain Speed: 2x12-Speed Electronic

• Brake Type: Flat-Mount Hydraulic Disc (Mineral Oil)

• Connectivity: Wireless Di2 Protocol / Bluetooth LE / ANT+

• Lever Material: Anodized Aluminum / Lightweight Composite Body

• Battery Type: CR1632 Coin Cell (2 per lever, included)

• Adjustability: Reach Adjust & Free Stroke Tuning

The Alegro Perspective: GRX RX825 levers represent a massive leap forward for gravel bike builds. Cable-actuated or fully wired cockpits can be a nightmare to route internally through modern gravel frames and integrated stems. The wireless setup on these Di2 hoods makes cockpit assembly clean and simple. Beyond the easy installation, the revised hood shape provides incredible security when you are descending fast over loose gravel. Your hands feel locked into the hoods, and the Servo Wave braking power means you never lose control when you need to slow down in a hurry.

Instant Wireless Shifting. Unmatched Gravel Ergonomics. Conquer Any Terrain with Shimano.