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eBay£275.84Visit shop Shimano GRX Di2 STI Shifter Brake Lever ST-RX825 Hydraulic 12-Speed Right Hand
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The Shimano GRX ST-RX825 is a right-hand, 12-speed hydraulic Di2 shift lever designed for gravel cyclists seeking precise electronic shifting and confident braking. It offers a secure grip and enhanced control on rough terrain with its specialized ergonomics, but requires integration into a compatible Shimano E-tube Di2 system for full functionality. Key features include optimized gearing, rugged reliability, and a quiet, stable drivetrain.
| Model Part Number | ST-RX825 |
|---|---|
| Brand | SHIMANO |
No, the ST-RX825 is a Di2 electronic shifting lever and requires a compatible Di2 system. It is not compatible with mechanical shifting.
The unique shape provides a more secure grip and better control on rough surfaces and descents, reducing hand fatigue and increasing rider confidence.
Yes, you need a compatible Shimano E-tube Di2 battery (e.g., BT-DN300) and the corresponding wiring system (internal or external) to power the electronic shifting.
No, this is a 12-speed lever and is only compatible with 12-speed Shimano E-tube Di2 drivetrains.
You can update the firmware using the Shimano E-tube application on a computer or mobile device, connected to your Di2 system.
The primary maintenance is periodic bleeding of the hydraulic system to ensure optimal braking performance. Ensure the brake fluid reservoir is kept topped up and check for leaks.
Verify that the Di2 system is properly connected and charged. Check all E-tube wire connections and ensure the system is synchronized via the E-tube app. Confirm compatibility with all other drivetrain components.
The hydraulic brake system may need bleeding. Consult a professional bike mechanic or follow Shimano's bleeding procedure using the correct mineral oil and tools. Ensure brake pads and rotors are clean and in good condition.
Check the rear derailleur alignment and limit screws. Perform a Di2 system adjustment via the E-tube app or ensure the B-tension screw is correctly set for optimal shifting. Ensure the chain and cassette are not excessively worn.
Setup: This lever is part of the Shimano E-tube Di2 system and requires connection to a compatible E-tube Di2 drivetrain (rear derailleur, cassette, chain) and a Di2 battery and internal/external wiring. Ensure the lever is securely mounted to your handlebar using the appropriate clamp size.
Compatibility: Designed for 12-speed Shimano GRX drivetrains. It is compatible with other Shimano E-tube Di2 components. Ensure firmware is up-to-date via the E-tube app for optimal performance.
Care: Clean the lever and hood regularly with a damp cloth. Avoid using abrasive cleaners or high-pressure water jets. Periodically check the Di2 system connections to ensure they are clean and secure. The brake hood and lever surface can be cleaned with mild soap and water.
