1.C - MECHANICAL SAFETY CHECK
Routinely check the condition of your bicycle before
every ride.
Nuts, Bolts, Screws and Other Fasteners
Because manufacturers use a wide variety of fastener
sizes and shapes made in a variety of materials, often
diering by model and component, the correct
tightening force or torque cannot be generalized.
To make sure that the many fasteners on your bicycle
are correctly tightened. See page PART II, Section E.
Always refer to the torque specications in the
instructions provided by the manufacturer of a
component in question.
Correctly tightening a fastener requires a calibrated
torque wrench. A professional bicycle mechanic with
a torque wrench should torque the fasteners on your
bicycle. If you choose to work on your own bicycle,
you must use a torque wrench and the correct
tightening torque specications from the bicycle
or component manufacturer or from your local REI
store. If you need to make an adjustment at home or
in the eld, we urge you to exercise care and to have
the fasteners you worked on checked by your local
REI store as soon as possible.
WARNING
CORRECT TIGHTENING FORCE ON FASTENERS
—NUTS, BOLTS, SCREWS—ON YOUR BICYCLE
IS IMPORTANT.
TOO LITTLE FORCE, AND THE FASTENER MAY
NOT HOLD SECURELY. TOO MUCH FORCE,
AND THE FASTENER CAN STRIP THREADS,
STRETCH, DEFORM OR BREAK. EITHER
WAY, INCORRECT TIGHTENING FORCE CAN
RESULT IN COMPONENT FAILURE, WHICH
CAN CAUSE YOU TO LOSE CONTROL AND
FALL WITH RISK OF SERIOUS INJURY OR
DEATH.
Make sure nothing is loose. Lift the front wheel o the
ground by two or three inches, then let it bounce on
the ground. Anything sound, feel or look loose? Do a
visual and tactile inspection of the whole bike. Any
loose parts or accessories? If so, secure them. If you’re
not sure, ask someone with experience to check.
Tires and Wheels
Make sure tires are correctly inated (see Section
4.G.1). Check by putting one hand on the saddle, one
on the intersection of the handlebars and stem, then
bouncing your weight on the bike while looking at
tire deection. Compare what you see with how it
looks when you know the tires are correctly inated;
and adjust if necessary.
Tires in good shape? Spin each wheel slowly and look
for cuts in the tread and sidewall. Replace damaged
tires before riding the bike.
Wheels true? Spin each wheel and check for brake
clearance and side-to-side wobble. If a wheel wobbles
side-to-side even slightly, or rubs against or hits the
brake pads, take the bike to a qualied bike shop to
have the wheel trued.
CAUTION
On many bicycles, the wheels must be true for
the brakes to work properly. Wheel trueing
is a skill that requires special tools and
experience. Do not attempt to true a wheel
unless you have the knowledge, experience
and tools needed to do the job correctly.
Improper wheel trueing could result in injury.
Wheel rims clean and undamaged? Make sure the
rims are clean and undamaged at the tire bead and,
if you have rim brakes, along the braking surface.
WARNING
BICYCLE WHEEL RIMS ARE SUBJECT TO WEAR.
ASK YOUR LOCAL REI STORE ABOUT WHEEL
RIM WEAR. SOME WHEEL RIMS HAVE A RIM
WEAR INDICATOR THAT BECOMES VISIBLE
OR INVISIBLE AS THE RIM’S BRAKING
SURFACE WEARS. EITHER INDICATOR WILL
SHOW YOU THAT THE RIM HAS REACHED ITS
MAXIMUM USABLE LIFE. RIDING A WHEEL
THAT IS AT THE END OF ITS USABLE LIFE
CAN RESULT IN WHEEL FAILURE, WHICH CAN
CAUSE YOU TO LOSE CONTROL AND FALL
WITH RISK OF SERIOUS INJURY OR DEATH.
Brakes
Check the brakes for proper operation (see Section
4.C). Squeeze the brake levers. Are the brake quick-
releases closed? Are all control cables seated and
securely engaged? Do the brake pads contact the
wheel rim squarely and make full contact with the
rim? Do the brake pads touch the wheel rim within
an inch of brake lever movement? Can you apply full
braking force at the levers without having them touch
the handlebar? If not, your brakes need adjustment.
Do not ride the bike until the brakes are properly
adjusted by a professional bicycle mechanic.
Wheel Retention System
Make sure the front and rear wheels are correctly
secured. See Section 4.A.
Seatpost
If your seatpost has a quick-release for easy height
adjustment, check that it is properly adjusted and in
the locked position. See Section 4.B.
Handlebar and Saddle Alignment
Make sure the saddle and handlebar stem are parallel
to the bike’s center line and clamped tight enough
so that you can’t twist them out of alignment. See
Section 3.B and 3.C.
Handlebar Ends
Make sure the handlebar grips are secure and in
good condition. Also be sure the handlebar ends and
extensions are plugged. If the handlebars have bar
end extensions, make sure they are clamped tight
enough so you can’t twist them.
WARNING
LOOSE OR DAMAGED HANDLEBAR GRIPS
OR EXTENSIONS CAN CAUSE YOU TO
LOSE CONTROL AND FALL. UNPLUGGED
HANDLEBARS OR EXTENSIONS CAN CUT
YOU AND CAUSE SERIOUS INJURY IN AN
OTHERWISE MINOR ACCIDENT.
VERY IMPORTANT SAFETY NOTE:
Please also read and become thoroughly familiar
with the important information on the lifespan
of your bicycle and its components in PART II,
Section D. Materials and Inspection.