Components Rear derailleurs Road Shimano GRX RX817 Di2 rear derailleur, 1x11, Shadow+

Shimano

Shimano GRX RX817 Di2 rear derailleur, 1x11, Shadow+

Name: Shimano GRX RX817 Di2 rear derailleur, 1x11, Shadow+
Price: 249.9 EUR
Availability: InStock

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249.90 €

RRP 336 €

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Delivery method on Tuesday 27.01.2026

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Delivery method on Tuesday 27.01.2026

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Product description

Shimano GRX RX817 Di2 derailleur

Gravel bikes are becoming increasingly popular among cyclists. The advantages are obvious. They have a more comfortable geometry than racing bikes, are excellent off-road and are suitable for longer journeys. However, conventional racing bike components have reached their limits on these bikes. That's why Shimano developed its own gear groups specifically for this type of bike.

Product features

The built-in stabilizer reliably prevents chain rubbing and keeps everything in place.
Ensures high shifting accuracy even in the most difficult off-road conditions
The Shadow's compact design not only looks good, but also protects the rear derailleur from damage in a fall

Product details

Groupset	Shimano GRX
Gears	1x11
Control type	electronic
Cage type	GS
Weight	322 g
Capacity	31T
Min./Max. the size of the large cassette pinion	40T / 42T
Min./Max. the size of a small cassette pinion	11T / 11T
Compatibility	11-speed Shimano Di2 Dual Control levers
product ID	87356
EAN

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Warnings and instructions

WARNING
For assistance with installation, adjustment, and replacement of products not found in the user's manual, consult a professional or experienced bicycle mechanic. A dealer's manual intended for professional and experienced bicycle mechanics is available on our website (https://si.shimano.com).
For safety, be sure to read this "user's manual" thoroughly before use, follow it for correct use, and keep it in a safe place for future reference.
The following instructions should always be followed in order to prevent personal injury, physical damage to equipment and the surrounding environment. The instructions are classified according to the degree of danger or damage that may occur if the product is used incorrectly.
DANGER - Failure to follow the instructions will result in death or serious injury.
WARNING - Failure to follow the instructions could result in death or serious injury.
CAUTION - Failure to follow the instructions could result in personal injury or physical damage to equipment and the surrounding environment.

For items requiring replacement, consult the place of purchase or a distributor.
Be sure to follow the instructions below to prevent burns and other injuries due to leakage, overheating, fire, or explosion.

DANGER
- Use the specified charging cable when charging the battery. Using any other item may result in fire, overheating, leakage, or damage to the connected PC.
- Prevent the charging cable from getting wet, and do not touch or hold it when it is wet or when your hands are wet. Failure to do so may cause operational problems or electric shock.
- Use an AC adapter with a USB port with a voltage of 5.0 V DC and a current of at least 1.0 A DC. If you use an adapter with a current value of less than 1.0 A, the AC adapter may overheat and cause fire, smoke, overheating, damage, electric shock, or burns.
- Do not heat the battery or expose it to fire. Failure to do so may cause the battery to burn or burst.
- Do not use or leave the battery in hot or humid places where the battery may be exposed to direct sunlight, in a closed vehicle on a hot day, or near a heater. Failure to do so may result in fire, burns, or other injuries due to leakage, overheating, or bursting.
- Do not deform, modify, or disassemble the battery. Also, do not apply solder directly to the battery terminals. Failure to do so may result in fire, burns, or other injuries due to leakage, overheating, or bursting.
- Do not touch metal terminals with metal objects such as hairpins. Failure to do so may cause short circuits, overheating, burns, or other injuries.

WARNING
- Do not disassemble or modify the product. This may cause the product to malfunction, you may fall unexpectedly and be seriously injured.
- Always grasp the cable plug when connecting or disconnecting the USB cable or charging cable. Failure to do so may result in fire or electric shock.
- If the following symptoms occur, stop using the device and contact the place of purchase. Fire or electric shock may occur.
- If a pungent-smelling smoke comes out of the power plug or the plug heats up. There may be a bad connection inside the power plug.
- If thunder is heard while charging with an AC adapter with a USB port, do not touch the device, bicycle, or AC adapter. Electric shock may occur due to lightning strike.
- Do not use a USB hub to connect the cable to the PC's USB port. Charging failure or fire may occur due to overheating.
- Be careful not to damage the charging cable. Do not damage it, modify it, bend it forcibly, twist or stretch it, place it near hot objects, place heavy objects on it, or tie it tightly together. If used in a damaged condition, fire, electric shock, or short circuit may occur.
- If the battery does not fully charge after 4 hours of charging, stop charging. Failure to do so may result in fire, bursting, ignition, or overheating.
- Do not immerse the product in fresh or salt water and prevent the terminals from getting wet. Failure to do so may result in fire, bursting, ignition, or overheating.
- Do not subject the product to strong impact or throw it. Failure to do so may result in bursting, overheating, or operational problems.
- Do not use the battery if it shows leakage, discoloration, deformation, or other unusual signs. Failure to do so may result in bursting, overheating, or operational problems.
- Clean the chain and QUICK-LINK regularly with a suitable chain cleaner. Maintenance intervals depend on usage and riding conditions. Never use alkaline or acid-based solvents such as rust removers. If such a solvent is used, the chain or QUICK-LINK may break and cause serious injury.
- Check the chain for damage (deformation or cracking), skipping, or any other irregularities such as unintended shifting. If any problems occur, contact the place of purchase or a distributor. The chain may break and you may fall.

CAUTION
- Store in a safe place out of reach of small children to prevent accidental ingestion.
- Prevent grease from adhering to metal terminals. This may cause conduction failure.
- Do not leave the charging cable connected during maintenance.

Road Shimano

Japanese manufacturer produces road, mountain, gravel, trekking, BMX and e-bike groupsets. They also offer a whole series of components and apparel. Their range goes from wheels, footwear, eyewear to backpacks. Shimano is a traditional manufacturer known for their quality work, which is why they are the favourite choice of amateurs and professionals.

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