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Shimano Ultegra RD-R8150 Di2 derailleur, 12-speed

282 € savings
RRP 539 €
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Delivery method on Friday 30.01.2026
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Delivery method on Friday 30.01.2026
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Shimano Ultegra RD-R8150 Di2 derailleur

Escape the everyday stereotype, discover endless possibilities and a sense of freedom. Find out what really matters and get ahead of the times with the new Ultegra.
Product features
Features the fastest and most accurate shifting - 58% faster than the RD-R9150
Universal thanks to one length of the shoulder strap, which is compatible with cassette sprockets from 28 to 34 teeth
The compact design includes an integrated wireless unit, charging port, power switch.
LED status indicator, provides pairing, shift mode setting
Product details
Groupset Shimano Ultegra
Gears 2x12
Control type electronic
Weight 262 g
Range 39T
Min./max size of the large pinion of the cassette 30T/34T
Min./max size of small cassette pinion 11T/11T
Charging cable EW-EC300
product ID 245374
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WARNING
For installation, adjustment and replacement information that is not found in the user's manual, consult the place of purchase or a distributor. A dealer's manual 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 place where it can be referred to at any time.
The following instructions must be always followed in order to prevent personal injury and physical damage to equipment and the 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 the equipment and surroundings.

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

DANGER
- Use the specified charging cable when charging the battery. Use of any other item may lead to 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 heat up and cause fire, smoking, 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 cause leakage, overheating, or bursting, resulting in fire, burns, or other injuries.
- Do not deform, modify, or disassemble the battery. Also, do not directly apply solder to the battery terminals. Failure to do so may cause leakage, overheating, or bursting, resulting in fire, burns, or other injuries.
- Do not allow metal terminals to come into contact 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 suffer serious injury.
- 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 pungent 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 during 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 due to overheating may occur.
- 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 state, fire, electric shock, or short circuit may occur.
- If the battery is not fully charged after 4 hours of charging, stop charging. Failure to do so may cause 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 cause fire, bursting, ignition, or overheating.
- Do not subject the product to strong impact or throw it. Failure to do so may cause bursting, overheating, or operational problems.
- Do not use the battery if it exhibits leakage, discoloration, deformation, or other abnormal signs. Failure to do so may cause 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 alkali or acid-based solvents such as rust removers. If such a solvent is used, the chain or QUICK-LINK may break, causing serious injury.
- Check that the chain is not damaged (deformation or cracking), skipping, or exhibiting any other abnormalities such as erratic shifting. If any problems occur, consult the place of purchase or a distributor. The chain may break and you may fall.

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

Shimano
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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