UM-8VR0A-008 User's manual ••Check the thickness of the brake pads and do not use them if they have

s of the brake pads and do not use them if they have up with a blanket. Stay warm and stable and seek professional medical Disc brake rotor

a thickness of 0.5 mm or less. Doing so may prevent the brakes from advice. Caliper
operating and result in serious injury.
Hydraulic Disc Brake 2 mm 0.5 m m
„„Burn-in period

••Disc brakes have a burn-in period, and the braking force will gradually Brake pad

increase as the burn-in period progresses. Make sure that you are aware
IMPORTANT NOTICE of any such increases in braking force when using the brakes during the
burn-in period.
••Contact the place of purchase or a distributor for information on
The same thing will happen when the brake pads or disc brake rotor
installation, adjustment, and replacement of the products which are not
are replaced.
found in the user's manual. A dealer's manual for professional and ••Do not use the disc brake rotor if it is cracked or deformed. The disc
experienced bicycle mechanics is available on our website (https://si. brake rotor may break, and result in serious injury due to a fall.
shimano.com).
Notice
••Do not use the disc brake rotor if its thickness is 1.5 mm or less. Also do
For safety, be sure to read this “user's manual” not use it if the aluminum surface becomes visible. The disc brake rotor
••To prevent noise and ensure the best performance, perform the burn-in
thoroughly before use, follow it for correct use, and may break, and result in serious injury due to a fall.
procedure after replacing the brake pads or disc brake rotor.
store it so that it can be referenced at any time. ••Do not continuously apply the brakes. Doing so may cause a sudden
The following instructions must be observed at all times in order to ••In the case of carbon levers, wash them with a soft cloth using a neutral
increase in the brake lever stroke, preventing the brakes from operating
detergent. Otherwise, the material may be damaged and lose strength. How to operate
prevent personal injury and physical damage to equipment and
and resulting in serious injury.
surroundings. The instructions are classified according to the degree of ••Avoid leaving the carbon levers in places where high temperatures are This product has a reach adjustment function.
••Do not use the brakes with fluid leaking. Doing so may prevent the
danger or damage which may occur if the product is used incorrectly. present. Also keep them well away from fire. If the brake levers seem too far away and are difficult to reach, contact
brakes from operating and result in serious injury.
••When the bicycle wheel has been removed, it is recommended that pad the place of purchase or a distributor.
Failure to follow the instructions will result ••Do not apply the front brake too strongly. If you do so, the front wheel
DANGER in death or serious injury. may lock and the bicycle may fall forward, and serious injury may result.
spacers are installed. Do not depress the brake lever while the wheel is
removed. If the brake lever is depressed without the pad spacers
Failure to follow the instructions could ••Because the required braking distance will be longer during wet
WARNING result in death or serious injury.
installed, the pistons will protrude further than normal. If that happens,
weather, reduce your speed and apply the brakes early and gently. You consult a place of purchase.
Failure to follow the instructions could
may fall or collide and be seriously injured.
CAUTION cause personal injury or physical damage ••Use soapy water and a dry cloth when cleaning and carrying out
••A wet road surface may cause tires to lose traction; therefore, to avoid maintenance of the brake system. Do not use commercially available
to equipment and surroundings.
this, reduce your speed and apply the brakes early and gently. If the brake cleaners or silencing agents. Such substances can cause damage
tires lose traction, you may fall and be seriously injured. to parts such as seals.
Important safety information „„For use with the dual control lever hydraulic disc brake type ••Products are not guaranteed against natural wear and deterioration
from normal use and aging.
••This hydraulic brake system has different braking characteristics from
WARNING those of the rim brake type, demonstrating relatively high braking force ••For maximum performance we highly recommend SHIMANO lubricants How to perform burn-in
at the beginning of braking (higher than the rim brake type); and maintenance products.
To optimize the performance of the brake pads and disc brake rotor,
••Because each bicycle may handle slightly differently depending on the familiarize yourself sufficiently with the braking characteristics before
perform the burn-in procedure as explained in the steps below.
model, be sure to learn the proper braking technique (including brake using it. If you ride the bicycle without becoming sufficiently familiar Regular inspections before riding the bicycle
lever pressure and bicycle control characteristics) and operation of your 1. Ride your bicycle in a flat and safe area without obstacles and
with the braking characteristics, braking may cause you to fall off the
bicycle. Improper use of your bicycle's brake system may result in a loss Before riding the bicycle, check the following items. If any problems are accelerate to a moderate speed.
bicycle, potentially causing serious injury or a fatal accident.
of control or a fall, which could lead to severe injury. found, consult your place of purchase or a distributor. 2. Operate the brake lever until you slow down to walking speed.
••The braking force for a hydraulic brake system will increase along with
••Do not disassemble or modify the product. This may cause the product ••Are there any signs of brake oil leakage? Do this only with one brake lever at a time. Be careful when performing
the size of the disc brake rotor (140 mm, 160 mm, 180 mm, 203 mm).
to not operate correctly, and you may suddenly fall and be seriously this procedure. Always operate your brake lever with moderation,
–– Do not use a 203 mm disc brake rotor. This will excessively increase ••Do the front and rear brakes work correctly?
injured. especially when you burn in the front brake.
the braking force, which could cause you to lose control of the ••Do the pads have a thickness of 0.5 mm or more?
••Riders must become accustomed to the higher performance of this bicycle, fall, and be seriously injured. 3. Repeat steps 1 and 2 for at least 20 times for both the front and rear
••Is the disc brake rotor cracked or deformed?
brake before riding the bicycle. The 203 mm and 180 mm disc brake –– Only use a 180 mm disc brake rotor if you are unable to obtain brakes.
rotors provide a higher braking force than the 160 mm disc brake sufficient braking force with a 160 mm disc brake rotor upon a trial ••Are the levers securely installed to the handlebar? While repeating the process, the brake force will increase.
rotors. If you ride the bicycle without becoming sufficiently familiar ride, such as when riding an electronic assist road bicycle or if the ••Are there signs of cracks or peeling on the levers?
with the braking characteristics, braking may cause you to fall off the rider is heavy. Otherwise, you may lose control of the bicycle, fall, ••Are there any abnormal noises?
bicycle, potentially causing serious injury or a fatal accident. and be seriously injured.
–– If you feel that the braking force is too high or too low, stop use and
••Please use extra caution to keep your fingers away
Names of parts
consult a place of purchase or a distributor. Make sure that you are
from the rotating disc brake rotor. The disc brake aware of any such increases in braking force when using the brakes
rotor is sharp enough to inflict severe injury to your during the burn-in period. Brake lever

fingers if caught within the openings of moving

rotor. CAUTION
Brake lever

••Do not touch the calipers or disc brake rotor while riding or „„Cautions on SHIMANO genuine mineral oil
immediately after dismounting from the bicycle.
••In the event of eye contact, flush with fresh water and seek medical
The calipers and disc brake rotor will become hot when the brakes are
assistance immediately.
operated, so you may get burned if you touch them.
Contact with eyes may result in irritation.
••Be careful not to allow any oil or grease to get onto the disc brake rotor
••In the event of skin contact, wash well with soap and water. One Holland, Irvine, California 92618, U.S.A. Phone: +1-949-951-5003
and brake pads.
Contact with skin may cause a rash and discomfort.
Riding the bicycle with oil or grease on the disc brake rotor and brake High Tech Campus 92, 5656 AG Eindhoven, The Netherlands Phone: +31-402-612222
pads may prevent the brakes from operating and result in serious injury ••Cover nose and mouth with a respirator type mask and use in a well
due to a fall or collision. ventilated area. 3-77 Oimatsu-cho, Sakai-ku, Sakai City, Osaka 590-8577, Japan
Inhalation of mineral oil mist or vapors may cause nausea. If mineral oil
mist or vapor is inhaled, go immediately to an area with fresh air. Cover Please note: specifications are subject to change for improvement without notice. (English)
© Sep. 2020 by SHIMANO INC. ITP