// MANUAL
CAUTION: Wheels must be true for rim brakes to work effectively. Wheel trueing is a
skill which 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.
• 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. Check to make sure that
any rim wear indicator marking is not visible at any point on the wheel rim.
WARNING: Bicycle wheel rims are subject to wear. Ask your PROPAIN about wheel
rim wear. Some wheel rims have a rim wear indicator which becomes visible as the rim’s
braking surface wears. A visible rim wear indicator on the side of the wheel rim is an
indication that the wheel 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.
• Brakes: Check the brakes for proper operation (see Section 4.C). Squeeze the brake
levers. Are the brake quick-releases closed? All control cables seated and securely
engaged? If you have rim brakes, do the brake pads contact the wheel rim squarely and
make full contact with the rim? Do the brakes begin to engage 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
• Seat post: If your seat post has an over-center cam action fastener 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 Sections 3.B and 3.C.
• Handlebar ends: Make sure the handlebar grips are secure and in good condition, with
no cuts, tears, or worn out areas. If not, have a bicycle dealer replace them. Make sure
the handlebar ends and extensions are plugged. If not, have PROPAIN or a bicycle dealer
plug them before you ride. 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 Appendix C.
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