Specialized Roubaix Comp Road Manual De Instrucciones página 23

• Hex nuts or hex key bolts which are threaded on to or into the hub axle
(bolt-on wheel, fig. 10)
Your bicycle may be equipped with a different securing method for the front
wheel than for the rear wheel. Discuss the wheel securing method for your
bicycle with your dealer.
It is very important that you understand the type of wheel securing method
on your bicycle, that you know how to secure the wheels correctly, and
that you know how to apply the correct clamping force that safely secures
the wheel. Ask your dealer to instruct you in correct wheel removal
and installation, and ask him to give you any available manufacturer's
instructions.
WARNING: Riding with an improperly secured wheel can allow
the wheel to wobble or fall off the bicycle, 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.
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Fig. 9
Fig. 10