Shimano GRX RD-RX825 Di2 Rear Derailleur - 12-Speed Long Cage With Clutch For 2x BLK
Shimano

Shimano GRX RD-RX825 Di2 Rear Derailleur - 12-Speed Long Cage With Clutch For 2x BLK

$445.00
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Shipping calculated at checkout.
  • Free Domestic shipping
  • In stock, ready to ship
  • Backordered, shipping soon
Shimano's GRX RX825 Di2 12-speed rear derailleur features a built-in wireless connectivity unit and charging port ensuring fast and reliable shifting for mixed-terrain riding and easy recharging. Integrated Shadow RD+ technology prevents chain slap and ensures precise shifting even on rough terrain. Thanks to built-in ON/OFF switch wheel removal is easy too. The RD-RX825 is compatible with 11-34t and 11-36t 12-speed cassettes and supports Full or Semi-Synchronized shift modes enhancing rider customization.
  • Integrated wireless unit charging port and switch allows a compact design
  • Offers fast and reliable shifting on rough terrain
  • Adjustable chain stabilizer prevents chain slap
  • Shimano Shadow RD+ offers a quiter drivetrain by utilizes a stablizer to reduce chain slap and provides a simple solution for chain drops
  • Gravel-tuned clutch tension features a switch stabilizer ON/OFF to match terrain - ON for gravel OFF for smooth roads
  • LED status indicator to easier identify battery life pairing adjust mode etc.
  • Top sprocket: Max. 11t/Min. 11t
  • Low sprocket: Max. 36t/Min. 34t
  • Total Capacity: 40t
    Largest Cog 36
    Rear Der/Shifter Compatibility Shimano Road Di2
    Rear Derailleur Mount Type Shimano Rear Direct Mount
    Drivetrain Speeds 12
    Chain Wrap Capacity (teeth) 40
    Cage Length Long
    Color Black

    • Shipping Policy

    Components:

    All component items (wheels, drivetrains, suspension, brakes, etc.) ship within 1–4 business days of purchase.

    Bicycles:

    Complete bikes typically ship within 2–3 weeks due to build, tuning, and inspection times. You will receive tracking information as soon as your order is ready to ship.

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    Every bike that leaves our shop is more than just a machine—it’s a promise of quality. From the moment you choose your ride, our expert team gets to work, hand-building and prepping each bike with precision. We meticulously inspect every component, fine-tune the details, and run thorough safety checks to ensure everything is dialed in perfectly. Because when you hit the road or trail, you deserve a bike that’s ready for anything.

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    At SpokeX Bike Co., bikes aren't just our business — they’re our way of life. As a rider-owned and operated shop, every decision we make comes from firsthand experience on the trail, at the race, and on the open road. We know what it’s like to chase a new line, push through the pain cave, and celebrate the ride — because we live it every day.

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