GRX RD-RX817 Di2 Rear Derailleur
Shimano

GRX RD-RX817 Di2 Rear Derailleur

IRDRX817

$334.99
/
Size

Free shipping on all orders over $49. $9 shipping for orders under $49.

Cannondale, Santa Cruz, Cervelo, Gazelle, BMC, and *other bikes ship for FREE, but Gold Label Assembly will be added at checkout for only $79 (reg. $100) to cover the professional bike build and re-packaging by our certified technicians. It’s bike shop quality, direct to your door!

Some bikes not eligible for shipping due to manufacturer restrictions.

Shop with confidence! It's important to us that you are happy with your Mike’s Bikes purchase so we offer offer a 30-day return/exchange window for your unused gear and 14 days on all bikes. Our exchange and return process is fast and easy. If you choose to exchange for a different size or color, we will ship your product for free.

View Full Policy

The Shimano GRX 11-speed Di2 rear derailleur integrates electronic shifting with silent and uninterrupted rear operation on rough terrain. An adjustable Shimano Shadow RD+ clutch prevents chain slapping and drops.

  • Operates with Shimano Di2 for digital electronic shifting
  • Gravel-tuned clutch tension provides smooth and reliable mixed surface shifting
  • For 1x drivetrains
  • Rear Derailleur Mount Type: Shimano Rear Direct Mount
  • Drivetrain Speeds: 11
  • Cage Length: Long
  • Chain Wrap Capacity (teeth): 31 teeth
  • Largest Cog: 42
  • Color: Black
  • Weight: 318 g
  • Rear Der/Shifter Compatibility: Shimano Road Di2

You may also like