Skip to content
  • Huge savings Save up 5% OFF, Code:GSBFMI , Black Friday flash sale opportunities, limited supplies.
  • Huge savings Save up 5% OFF, Code:GSBFMI , Black Friday flash sale opportunities, limited supplies.
Bikes Gear SalesBikes Gear Sales
    • No products in the basket.

      Return to shop

  • Basket

    No products in the basket.

    Return to shop

  • Clothing
    • Road Cycling Shoes
    • Cycling Jerseys
    • Bicycle Helmets
    • Cycling Bibs & Shorts
    • Cycling Sunglasses
  • Components
    • Tyres
    • Bottom Brackets
    • Chainsets
    • Pedals
    • Bike Cassettes
    • STi Levers
    • Saddles
    • Handlebars
    • Rear Derailleurs
    • Di2 Extras
    • Front Derailleurs
    • Chains
    • Disc Brake Rotors
    • Stems
    • Chainrings
  • Frameset Parts
    • Bike Dropouts
    • Forks
    • Bike Headsets
    • Bike Seatposts
    • Seat Post Clamps
    • Bike Bolts
    • Front Mech Clamps
    • Fork Expander
    • Bike Decals
  • Wheels
    • Road Bike Wheels
    • Track Bike Wheels
  • Accessories
    • Bike Bags & Racks
    • Bike Computers & GPS
    • Bike Tools & Maintenance
    • Bike Mudguards
    • Bike Pumps
    • Bike Parts
    • Bike Lights
    • Cycling Nutrition
    • Bike Locks
    • Bike Water Bottles / Cages
Components / Rear Derailleurs
Sale!
GRX RD-RX815-DI2 - (34T) Rear Derailleur

GRX RD-RX815-DI2 – (34T) Rear Derailleur

£284.99 Original price was: £284.99.£95.99Current price is: £95.99.

Buy Now
SKU: ZG9SY 78853815234 Categories: Components, Rear Derailleurs
  • Effortless solutions, excellent customer care.
  • Quick responses, top-notch service.
  • Secure Shopping with Safe Payments
  • Free Shipping, No Compromise on Quality
Browse
  • Accessories
    • Bike Bags & Racks
    • Bike Computers & GPS
    • Bike Lights
    • Bike Locks
    • Bike Mudguards
    • Bike Parts
    • Bike Pumps
    • Bike Tools & Maintenance
    • Bike Water Bottles / Cages
    • Cycling Nutrition
  • Clothing
    • Bicycle Helmets
    • Cycling Bibs & Shorts
    • Cycling Jerseys
    • Cycling Sunglasses
    • Road Cycling Shoes
  • Components
    • Bike Batteries
    • Bike Cassettes
    • Bottom Brackets
    • Brake Calipers
    • Chainrings
    • Chains
    • Chainsets
    • Cranks
    • Di2 Extras
    • Disc Brake Rotors
    • Front Derailleurs
    • Handlebars
    • Pedals
    • Rear Derailleurs
    • Saddles
    • Sprockets
    • Stems
    • STi Levers
    • Tyres
  • Frameset Parts
    • Bike Bolts
    • Bike Decals
    • Bike Dropouts
    • Bike Headsets
    • Bike Seatposts
    • Fork Expander
    • Forks
    • Front Mech Clamps
    • Seat Post Clamps
  • Uncategorized
  • Wheels
    • Road Bike Wheels
    • Track Bike Wheels
  • Description
  • Reviews (0)
Product Information

Highly versatile, this stunning model’s chain stabiliser prevents chain slapping and drops as you conquer every road. You’ll notice its silent and uninterrupted rear shifting on especially harsh terrains, where other rear mechs could struggle. What’s also very impressive is its switch stabiliser which provides you with the freedom to turn it on/off to match the terrain conditions.

Featuring the revolutionary Di2 shifting system, this rear mech delivers instant, accurate, lightning-fast shifts on every run. At the push of a button, you can maintain precise control even in the most extreme conditions with its electronic brain keeping you in charge. Additionally, you can change gear even under heavy load while climbing or accelerating making it perfect for tough rides.

Smooth and reliable on mixed surfaces, its gravel-tuned clutch tension is ready to conquer all the challenges of a long ride out. Whether you’re riding after work with your buddies or exploring new and unpredictable surroundings, this 2×11 speed version won’t let you down.

Product Data
Speed: 11 Speed
Commuter: Yes
Cyclocross: Yes
Road: Yes

  • Model Type:
    GRX
  • Brand:
    Shimano

Reviews

There are no reviews yet.

Be the first to review “GRX RD-RX815-DI2 – (34T) Rear Derailleur” Cancel reply

Related products

Sale!
KMC X11 11spd Chain
Quick View

Chains

KMC X11 11spd Chain

£18.98 Original price was: £18.98.£13.29Current price is: £13.29.
Sale!
Shimano CN-M7100 12spd Chain (With Quick Link)
Quick View

Chains

Shimano CN-M7100 12spd Chain (With Quick Link)

£34.99 Original price was: £34.99.£24.49Current price is: £24.49.
Sale!
Shimano SM-RT70 140mm Rotor W/Lock Ring (Rear)
Quick View

Components

Shimano SM-RT70 140mm Rotor W/Lock Ring (Rear)

£29.99 Original price was: £29.99.£20.99Current price is: £20.99.
Sale!
Campag Ultra-Torque Threaded Bsa Cups OC12-REG
Quick View

Bottom Brackets

Campag Ultra-Torque Threaded Bsa Cups OC12-REG

£29.99 Original price was: £29.99.£20.99Current price is: £20.99.
Sale!
Vittoria Zaffiro PRO V Fold BLK Tyre (30-622-700x30c)
Quick View

Components

Vittoria Zaffiro PRO V Fold BLK Tyre (30-622-700x30c)

£25.49 Original price was: £25.49.£17.84Current price is: £17.84.
Sale!
Deda Vinci (Carbon) DCR Handlebars
Quick View

Components

Deda Vinci (Carbon) DCR Handlebars

£294.98 Original price was: £294.98.£96.99Current price is: £96.99.
Sale!
Garmin Rally RS200 Dual-sensing Power Meter Pedals (Shimano SPD-SL)
Quick View

Components

Garmin Rally RS200 Dual-sensing Power Meter Pedals (Shimano SPD-SL)

£376.00 Original price was: £376.00.£97.99Current price is: £97.99.
Sale!
Shimano CS-M8000-XT Cassette - (11-40T)
Quick View

Bike Cassettes

Shimano CS-M8000-XT Cassette – (11-40T)

£100.00 Original price was: £100.00.£70.00Current price is: £70.00.
Products
  • Shimano RC3 Road Shoes Shimano RC3 Road Shoes £109.99 Original price was: £109.99.£76.99Current price is: £76.99.
  • Dolan Jersey-Short Sleeve Grey/Black Dolan Jersey-Short Sleeve Grey/Black £59.99 Original price was: £59.99.£41.99Current price is: £41.99.
LEGAL
  • Privacy Policy
  • Shipping & Returns
  • FAQ
  • Returns & Exchanges
  • Term and Conditions
CUSTOMER SERVICE
  • My account
  • Delivery
  • Payment Method
  • Contact Us
  • About Us
Signup for Newsletter

Sign up for exclusive offers, original stories, events and more.

    Copyright 2025 © Bikes Gear Sales
    • Clothing
      • Road Cycling Shoes
      • Cycling Jerseys
      • Bicycle Helmets
      • Cycling Bibs & Shorts
      • Cycling Sunglasses
    • Components
      • Tyres
      • Bottom Brackets
      • Chainsets
      • Pedals
      • Bike Cassettes
      • STi Levers
      • Saddles
      • Handlebars
      • Rear Derailleurs
      • Di2 Extras
      • Front Derailleurs
      • Chains
      • Disc Brake Rotors
      • Stems
      • Chainrings
    • Frameset Parts
      • Bike Dropouts
      • Forks
      • Bike Headsets
      • Bike Seatposts
      • Seat Post Clamps
      • Bike Bolts
      • Front Mech Clamps
      • Fork Expander
      • Bike Decals
    • Wheels
      • Road Bike Wheels
      • Track Bike Wheels
    • Accessories
      • Bike Bags & Racks
      • Bike Computers & GPS
      • Bike Tools & Maintenance
      • Bike Mudguards
      • Bike Pumps
      • Bike Parts
      • Bike Lights
      • Cycling Nutrition
      • Bike Locks
      • Bike Water Bottles / Cages
    • Login

    Login

    Lost your password?

    Register

    Your personal data will be used to support your experience throughout this website, to manage access to your account, and for other purposes described in our privacy policy.