GT Grade - 4.A - Wheels

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PART 1
4.A - Wheels
Section 4. Tech
GT Bicycle Owner’s Manual
• A hollow axle with a shaft (“skewer”)
running through it which has a nut on one
end and a fitting for a hex key, lock lever or
other tightening device on the other (through
bolt, fig. 9)
• Hex nuts or hex key bolts which are threaded
on to or into the hub axle (bolt-on wheel, fig.
10)
WARNING
Riding with an improperly secured wheel can
allow the wheel to wobble or fall off the
bicycle, or suddenly stop the wheel, which can
cause serious injury or death. Therefore, it is
essential that you:
1. Ask your dealer to help you make sure you
know how to install and remove your
wheels safely.
2. Understand and apply the correct
technique for clamping your wheel in
place.
3. Each time, before you ride the bike, check
that the wheel is securely clamped. The
clamping action of a correctly secured
wheel must emboss the surfaces of the
dropouts.
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4.A - Wheels
Bicycle wheels are designed to be removable for
easier transportation and for repair of a tire
puncture. In most cases, the wheel axles are
inserted into slots, called “dropouts” in the fork
and frame, but some suspension mountain bikes
use what is called a “through axle” wheel
mounting system.
If you have a mountain bike equipped with
through axle front or rear wheels, make sure
that your dealer has given you the
manufacturer’s instructions, and follow those
when installing or removing a through axle
wheel. If you don’t know what a through axle is,
ask your dealer.
If you do not have a bicycle with a through-axle
mounting system, it will have wheel secured in
one of the following three ways:
• A hollow axle with a shaft (“skewer”)
running through it which has an adjustable
tension nut on one end and an over-center
cam on the other (cam action system, fig.8a
& 8b).
• A hollow axle with a shaft (“skewer”)
running through it which has a nut on one
end and a fitting for a hex key, lock lever or
other tightening device on the other (through
bolt, fig. 9)
• Hex nuts or hex key bolts which are threaded
on to or into the hub axle (bolt-on wheel, fig.
10)