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4. Tech
It’s important to your safety, performance and enjoyment to understand how things work on
your bicycle. We urge you to ask your dealer how to do the things described in this section
before you attempt them yourself, and that you have your dealer check your work before you
ride the bike. If you have even the slightest doubt as to whether you understand something in
this section of the Manual, talk to your dealer. See also Appendix A, B, C and D.
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.
Wheels are secured in one of 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.7 a & b)
Through Axle
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