Skip to main content
  1. Home
  2. Bicycling Catalog
  3. Parts
  4. Derailleurs
  5. Rear
  6. Shimano

Shimano GRX RX815 Di2 11-Speed Rear Derailleur

Shimano GRX RX815 Di2 11-Speed Rear Derailleur
$299.99
Speeds:
11-speed
Color:
Black
Cage Length:
Long Cage
Please select options Unavailable
This item is not permitted to be shipped, however it can be purchased online and picked up at one of our locations at your convenience. We gladly ship applicable orders anywhere within the Continental United States. Please note that any in-store pickup items will require that the Photo ID, Credit Card used for the purchase, and Purchaser be present for verification upon pickup. IN COMPLIANCE WITH BRAND GUIDLINES ALL SPECIAL ORDERED/NOT IN STOCK BICYCLES ARE SUBJECT TO A DESTINATION CHARGE (MINIMUM OF $50 BUT SUBJECT TO CHANGE). THIS WILL BE COLLECTED IN STORE AT TIME OF PICK UP. In an industry-wide partnership with PeopleForBikes and Call2Recycle program, all pedal assist e-bikes are subject to a $15 e-bike battery recycling fee.

Details

With an integrated chain stabilizer mechanism, the Shimano GRX derailleur provides a quieter experience along with shifting security and precision on mixed terrain. For rides on smooth surfaces, the derailleur features and ON/OFF switch for the chain stabilizer. The RD-RX815 Di2 version offers the digital precision of Shimano electronic shifting with synchronization and is compatible with road cassettes with a max cog size of 34T.

- Adjustable, gravel-tuned chain stabilizer prevents chain slapping and drops
- Switch stabilizer ON/OFF to match the terrain
- Total capacity: 38T
- Smooth and reliable mixed surface shifting
- Compatible with current road Dual Control Lever
- Maximum front difference: 17T
- High cog: Max. 11T/Min. 11T
- Low cog: Max. 34T/Min. 30T

Electronic drivetrain systems deliver excellent shifting, easy set up, and solid battery life. Here are some benefits of electronic shifting that you don't want to miss.

Electronic shifting delivers exceptional performance.

Shifting Performance

Electronic shifting systems use powerful servo motors to rapidly shift the chain. Because microprocessors and sensors constantly monitor every aspect of the system, they shift with surgical precision and without chain rub.

Electronic shifting is customizable.

Customization

Many major systems have customizable shifting. Some have the ability to add remote shifters for common riding positions, and some even allow you to change the functions of the shifting buttons.

Electronic shifting is light on the maintenance.

Dependability

Electronic groupsets are responsive and consistent. There are no cables to stretch and wear out, so you get a flawless shift every time. The added bonus is you'll never have to replace a derailleur cable ever again.

Videos

Part Numbers

Option UPC MPN Store SKU
Long Cage / Black / 11-speed 192790443188 IRDRX815 REA34932963D

Reviews