Shimano BR-M8120 manual

Shimano BR-M8120
8.1 · 1
PDF manual
 · 2 pages
English
manualShimano BR-M8120

Hydraulic Disc Brake

(for Downhill / Freeride)

IMPORTANT NOTICE

Contact the place of purchase or a distributor for information on installation,
adjustment, and replacement of the products which are not found in the user's
manual. 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 store it so that it
can be referenced at any time.
The following instructions must be observed at all times in order to prevent
personal injury and physical damage to equipment and surroundings. The
instructions are classified according to the degree of danger or damage which 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 cause
personal injury or physical damage to equipment
and surroundings.

Important safety information

WARNING

Because each bicycle may handle slightly differently depending on the model, be
sure to learn the proper braking technique (including brake lever pressure and
bicycle control characteristics) and operation of your bicycle. Improper use of your
bicycle's brake system may result in a loss of control or a fall, which could lead to
severe injury.
Do not disassemble or modify the product. This may cause the product to not
operate correctly, and you may suddenly fall and be seriously injured.
Downhill bicycle riding and freeriding are inherently dangerous activities. It is
strongly recommended that riders wear protective head and body gear and
perform thorough safety checks of their bicycles before riding. Please remember
that you are riding at your own risk and that you have to consider your
experience and your skills very carefully. There is a risk of being involved in an
accident that can result in a serious injury or even death.
Riders must become accustomed to the higher performance of this brake before
riding the bicycle.
The brake system is designed for downhill bicycle riding and freeriding, and its
braking force is much higher than for other brakes. If you do not familiarize
yourself with the performance level of this brake, you may be involved in an
accident that could result in serious injury or even death. Furthermore, the
settings of the brakes make them unsuitable for riding on city streets. Sudden
brake operations may cause the bicycle to fall forward, which can result in
serious injury or even death.
The 203 mm and 180 mm disc brake rotors provide a higher braking force than
the 160 mm disc brake rotors. If you ride the bicycle without becoming
sufficiently familiar with the braking characteristics, braking may cause you to
fall off the bicycle, potentially causing serious injury or a fatal accident.
Please use extra caution to keep your fingers away from the
rotating disc brake rotor. The disc brake rotor is sharp
enough to inflict severe injury to your fingers if caught
within the openings of moving rotor.
Do not touch the calipers or disc brake rotor while riding or immediately after
dismounting from the bicycle. The calipers and disc brake rotor will become hot
when the brakes are operated, so you may get burned if you touch them.
Be careful not to allow any oil or grease to get onto the disc brake rotor and
brake pads. Riding the bicycle with oil or grease on the disc brake rotor and brake
pads may prevent the brakes from operating and result in serious injury due to a
fall or collision.
Check the thickness of the brake pads and do not use them if they have a
thickness of 0.5 mm or less. Doing so may prevent the brakes from operating and
result in serious injury.
2 mm 0.5 mm
Do not use the disc brake rotor if it is cracked or deformed. The disc brake rotor
may break, and result in serious injury due to a fall. Replace the disc brake rotor
with a new one.
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 becomes visible. The disc brake rotor may break, and
result in serious injury due to a fall. Replace the disc brake rotor with a new one.
Do not continuously apply the brakes. Doing so may cause a sudden increase in
the brake lever stroke, preventing the brakes from operating and resulting in
serious injury.
Do not use the brakes with fluid leaking. Doing so may prevent the brakes from
operating and result in serious injury.
Do not apply the front brake too strongly. If you do so, the front wheel may lock
and the bicycle may fall forward, and serious injury may result.
Because the required braking distance will be longer during wet weather, reduce
your speed and apply the brakes early and gently. You may fall or collide and be
seriously injured.
A wet road surface may cause tires to lose traction; therefore, to avoid this,
reduce your speed and apply the brakes early and gently. If the tires lose traction,
you may fall and be seriously injured.

CAUTION

Cautions on SHIMANO genuine mineral oil
Use appropriate eye protection when handling, and avoid contact with eyes. In
the event of eye contact, flush with fresh water and seek medical assistance
immediately. Contact with eyes may result in irritation.
Use gloves when handling. In the event of skin contact, wash well with soap and
water. Contact with skin may cause a rash and discomfort.
Cover nose and mouth with a respirator type mask and use in a well ventilated
area. Inhalation of mineral oil mist or vapors may cause nausea.
If mineral oil mist or vapor is inhaled, go to an area with fresh air. Cover up with
a blanket. Stay warm and stable and seek professional medical advice
immediately.
Bed-in period
Disc brakes have a bed-in period, and the braking force will gradually increase as
the bed-in period progresses. Make sure that you are aware of any such increases
in braking force when using the brakes during the bed-in period. The same thing
will happen when the brake pads or disc brake rotor are replaced.

Notice

To prevent noise and ensure the best performance, perform the bed-in procedure
after replacing the brake pads or disc brake rotor.
When the bicycle wheel has been removed, it is recommended that pad spacers
are installed. Do not depress the brake lever while the wheel is removed. If the
brake lever is depressed without the pad spacers installed, the pistons will
protrude further than normal. If that happens, consult a place of purchase.
Use soapy water and a dry cloth when cleaning and carrying out maintenance of
the brake system. Do not use commercially available brake cleaners or silencing
agents. Such substances can cause damage to parts such as seals.
This product is not warranted against damage resulting from improper use, such
as jumping while riding or if the bicycle falls over, except if such malfunctions are
caused by manufacturing methods.
Products are not guaranteed against natural wear and deterioration from normal
use and aging.
For maximum performance we highly recommend SHIMANO lubricants and
maintenance products.

Regular inspections before riding the bicycle

Before riding the bicycle, check the following items. If any problems are found,
consult your place of purchase or a distributor.
Are there any signs of brake oil leakage?
Do the front and rear brakes work correctly?
Do the pads have a thickness of 0.5 mm or more?
Is the disc brake rotor cracked or deformed?
Are the levers securely installed to the handlebar?
Are there signs of cracks or peeling on the levers?
Are there any abnormal noises?
UM-8VT0A-003

User's Manual

View the manual for the Shimano BR-M8120 here, for free. This manual comes under the category not categorized and has been rated by 1 people with an average of a 8.1. This manual is available in the following languages: English. Do you have a question about the Shimano BR-M8120 or do you need help? Ask your question here

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Question and answer

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The Shimano BR-M8120 is a bicycle brake component that falls under the not categorized category. With a weight of 410 grams, this product offers a single unit per pack. Unfortunately, no additional information is available to provide a more comprehensive description.

General
BrandShimano
ModelBR-M8120 | BR-M8120
Productnot categorized
LanguageEnglish
FiletypeUser manual (PDF)
Weight & dimensions
Weight410 g
Packaging content
Quantity per pack1 pc(s)
show more

Can't find the answer to your question in the manual? You may find the answer to your question in the FAQs about the Shimano BR-M8120 below.

What is the weight of the Shimano BR-M8120?

The Shimano BR-M8120 has a weight of 410 g.

Is the Shimano BR-M8120 sold individually or in packs?

A pack of Shimano BR-M8120 includes 1 pc(s), meaning it is sold individually.

How can I check the brake performance of the Shimano BR-M8120?

To check the brake performance of the Shimano BR-M8120, follow these steps: 1. Start by checking if both the front and rear brakes are working correctly. Squeeze the brake levers and ensure that the brakes engage smoothly and effectively. 2. Verify that the brake pads have a thickness of 0.5 mm or more. If the pads are worn down below this threshold, they should be replaced. 3. Inspect the disc brake rotor for any cracks or deformations. A damaged rotor can affect braking performance and should be replaced if necessary. 4. Ensure that the brake levers are securely installed to the handlebar. Check for any signs of cracks or peeling on the levers, as this could indicate a need for replacement. 5. Listen for any abnormal noises while operating the brakes. Unusual sounds, such as squealing or grinding, may indicate a problem with the brake system that requires further inspection or maintenance. By following these steps, you can effectively check the brake performance of the Shimano BR-M8120 and ensure safe and reliable braking on your bicycle.

What is the correct installation procedure for the brake levers of the Shimano BR-M8120?

To correctly install the brake levers of the Shimano BR-M8120, follow these steps: 1. Start by ensuring that the levers are securely installed to the handlebar. Check for any signs of cracks or peeling on the levers, as this could indicate a need for replacement. 2. Position the brake levers at a comfortable angle and height on the handlebar. Adjust them according to your preference and riding style. 3. Tighten the clamp bolts on the brake levers using an appropriate Allen key or wrench. Make sure to tighten them securely, but avoid over-tightening to prevent damage. 4. Double-check the alignment of the brake levers. They should be parallel to the handlebar and symmetrical on both sides. 5. Test the brake levers by squeezing them to ensure smooth and responsive operation. Make sure they engage the brakes effectively and return to their original position when released. By following these steps, you can correctly install the brake levers of the Shimano BR-M8120, ensuring optimal performance and control while riding your bicycle.

What are the names of the different parts of the Shimano BR-M8120 brake system?

The names of the different parts of the Shimano BR-M8120 brake system are as follows: 1. Brake lever: This is the component that you operate with your fingers to engage the brakes. 2. Disc brake rotor: It is a circular metal disc attached to the wheel hub. When the brake pads squeeze against the rotor, it creates friction to slow down or stop the bicycle. 3. Caliper: The caliper is responsible for housing the brake pads and applying pressure to the disc brake rotor when the brake lever is squeezed. 4. Brake pad: These are the replaceable components that come into contact with the disc brake rotor. They provide the necessary friction to stop the bicycle. By familiarizing yourself with these names, you will have a better understanding of the different components that make up the Shimano BR-M8120 brake system.

How can I adjust the reach of the brake levers on the Shimano BR-M8120?

To adjust the reach of the brake levers on the Shimano BR-M8120, follow these steps: 1. Locate the reach adjustment mechanism on the brake lever. It is usually a small dial or screw located near the pivot point of the lever. 2. Use a suitable tool, such as an Allen key or screwdriver, to adjust the reach. Turning the dial or screw clockwise will bring the lever closer to the handlebar, while turning it counterclockwise will move the lever farther away. 3. Start by making small adjustments and test the reach after each adjustment. Squeeze the brake lever and ensure that you can comfortably reach it without straining your fingers or hand. 4. Continue making adjustments until you find the optimal reach position that provides a comfortable and secure grip on the brake lever. 5. Once you have achieved the desired reach, tighten the reach adjustment mechanism securely to prevent any unwanted movement or changes. By following these steps, you can easily adjust the reach of the brake levers on the Shimano BR-M8120 to suit your personal preference and riding comfort.

What is the bed-in procedure for optimizing the performance of the brake pads and disc brake rotor on the Shimano BR-M8120?

To optimize the performance of the brake pads and disc brake rotor on the Shimano BR-M8120, follow these steps for the bed-in procedure: 1. Find a flat and safe area without obstacles and accelerate your bicycle to a moderate speed. 2. Operate the brake lever gradually until you slow down to walking speed. Perform this step with one brake lever at a time. Be cautious and operate the brake lever with moderation, especially when bed-in the front brake. 3. Repeat steps 1 and 2 at least 20 times for both the front and rear brakes. As you repeat the process, the brake force will increase. By following these steps, you will optimize the performance of the brake pads and disc brake rotor on your Shimano BR-M8120. Please note that specifications are subject to change for improvement without notice.

Is the manual of the Shimano BR-M8120 available in English?

Yes, the manual of the Shimano BR-M8120 is available in English .

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