Shimano 105 ST-R7170 shift/hydraulic brake lever, 12-speed, right

WARNING
Information on product installation, adjustment, and replacement not found in the user's manual can be obtained at the place of purchase or from a distributor. The dealer's manual for professional and experienced bicycle mechanics can be found on our website (https://si.shimano.com).
For safety, thoroughly read this “user's manual” before use, follow it for proper use, and store it for future reference.
The following instructions must always be followed to prevent personal injury and physical damage to equipment and surroundings. Instructions are classified according to the degree of danger or damage that may occur in case of improper use of the product.
DANGER - Failure to follow instructions will result in death or serious injury.
WARNING - Failure to follow instructions could result in death or serious injury.
CAUTION - Failure to follow instructions could result in personal injury or physical damage to equipment and surroundings.

WARNING
- Because each bicycle may handle slightly differently depending on the model, learn the correct braking technique (including brake lever pressure and bicycle handling characteristics) and operation of your bicycle. Improper use of the bicycle's braking system can result in loss of control, which can lead to serious injury due to a fall or collision.
- Do not disassemble or modify the product. This may cause the product to malfunction, you may fall unexpectedly and be seriously injured.
- Do not subject the product to strong impact or throw it. Failure to do so may result in cracking, overheating, or operational problems.
- Prevent grease from adhering to metal terminals. This may cause conduction failure.
- Use only the specified button batteries. When replacing a button battery, replace both batteries with new ones at the same time. Using different types of button batteries or new and old button batteries together can cause the button batteries to rupture, leak fluid, overheat, or ignite, which can lead to fire, injuries, or environmental contamination.
- Button batteries are dangerous and must be kept out of reach of children. Never put batteries in your mouth or any part of your body. If swallowed or placed in the body, serious or fatal injuries can occur within 2 hours. If this happens or is suspected, seek immediate medical attention.
- Do not use this equipment in places where children may be present. In case of accidental ingestion of the supplied button batteries, seek immediate medical attention.
- Dispose of button batteries in accordance with applicable local and/or national disposal regulations. Disposing of this product in fire or a hot oven, or mechanically crushing or cutting it, can lead to the explosion of button batteries.
- Do not use button batteries outside the specified operating temperature ranges. If the battery is used or stored at temperatures outside these ranges, fire, injuries, or operational problems may occur.
- Do not use button batteries if they show fluid leakage, discoloration, deformation, or other atypical signs. Failure to do so may result in rupture, overheating, or operational problems.
- If leaking fluid from button batteries gets on your skin or clothing, immediately clean them with clean water. Leaking fluid can damage your skin.
- Do not leave this product in an extremely high-temperature environment, such as an enclosed vehicle on a hot day, or near a heater. This could cause the button batteries to explode or flammable liquid or gas to leak from them.
- Do not expose this product to extremely low air pressure. This could cause the button batteries to explode or flammable liquid or gas to leak from them. Air transport of this product is not a problem.
- When operating the shift switch, be careful not to get your fingers caught in the derailleur. The powerful motor that drives the electronic gear shift derailleur will run without stopping until the shift position is reached.
- This hydraulic brake system has different braking characteristics than rim brake type braking characteristics, indicating a relatively large braking force at the beginning of braking (higher than rim brake type); familiarize yourself sufficiently with the braking characteristics before use. If you ride the bicycle without thoroughly familiarizing yourself with the braking characteristics, braking may result in falling off the bicycle with possible serious injury or fatal accident.
- The braking force of the hydraulic brake system will increase with the size of the disc brake rotor (140 mm, 160 mm, 180 mm, 203 mm).
- Do not use a 203 mm disc brake rotor. This will excessively increase the braking force, which can cause loss of control of the bicycle, a fall, and serious injury.
- Use a 180 mm disc brake rotor only if you cannot obtain sufficient braking force with a 160 mm disc brake rotor during a test ride, for example, when riding an electronically assisted road bicycle or if the rider is heavy. Otherwise, you may lose control of the bicycle, fall, and be seriously injured.
- If the braking force seems too great or too small, stop using it and consult the place of purchase or a distributor. Accidents or falls resulting in serious injury may occur due to loss of control of the bicycle.
- Keep fingers at a sufficient distance from rotating disc brake rotors. The disc brake rotor is sharp enough to cause serious injury to fingers if they get caught in the holes of the moving rotor.
- Do not touch the calipers or disc brake rotor while riding or immediately after dismounting the bicycle. During braking, the calipers and disc brake rotor heat up, so touching them can cause burns.
- Do not allow oil or grease to get on the disc brake rotor and brake pads. Riding a bicycle with oil or grease on the brake pads can cause the brakes to malfunction and lead to serious injury due to a fall or collision.
- Check the thickness of the brake pads and do not use them if they are 0.5 mm thick or less. This can cause the brakes to malfunction and lead to serious injury.
- Do not use the disc brake rotor if it is cracked or deformed. The disc brake rotor can break and lead to serious injury caused by a fall.
- Do not use the disc brake rotor if its thickness is 1.5 mm or less. Also, do not use it if the aluminum surface is visible. The disc brake rotor can break and lead to serious injury caused by a fall.
- Do not apply the brakes continuously. This can cause a sudden increase in brake lever engagement, cause the brakes to malfunction, and lead to serious injury.
- Do not use the brakes if fluid is leaking. This can cause the brakes to malfunction and lead to serious injury.
- Do not apply the front brake too hard. If you do, the front wheel may lock up and the bicycle may flip forward, causing serious injury.
- Because the required braking distance will be longer during wet weather, reduce your speed. Apply the brakes early and gently. You may fall or collide and be seriously injured.
- Wet road surfaces can cause tires to lose traction. To prevent this, reduce your speed and apply the brakes early and gently. If the tires lose traction, you may fall and be seriously injured.

CAUTION
- Warnings regarding genuine SHIMANO mineral oil
- In case of eye contact, rinse the eye with clean water and seek immediate medical attention. Eye contact can cause irritation.
- In case of skin contact, wash thoroughly with soap and water. Skin contact can cause rashes and discomfort.
- Protect your nose and mouth with a protective respiratory mask and use in a well-ventilated area. Inhaling vapor or fumes from mineral oil can cause nausea.
- After inhaling mineral oil vapor or fumes, immediately go to a place with fresh air. Cover yourself with a blanket. Stay warm in a stable position and seek professional medical attention.
Break-in period
- Disc brakes have a certain break-in period, and the braking force gradually increases with the increasing break-in period. Accidents or falls resulting in serious injury may occur due to loss of control of the bicycle. The same situation will occur when replacing brake pads or the disc brake rotor.