Maintenance and car
e
HP
Velotechnik
39
Wheels
The correct air pressure is decisive for
smooth running and a good protection against
punctures.The maximum pressure is printed
on the sidewall of your tire.You might find an
indication of the minimum required pressure
on the sidewall of the tire as well.
Since the tubes in the tires gradually loose air
you should check the air pressure before
every ride.
The tubes come with Presta valves (also called
french valves).They are very airtight and easy
to pump up.
To do so, first screw off the valve cap. Now
you see a small threaded rod with a knurled
nut that comes out of the valve. Loosen the
knurled nut as far as it is possible.
To pump up the tire and check the pressure
you need a pump with a gauge, preferably a
solid floor pump. Put the knob of the pump on
the valve, push it completely on the valve and
then retract it a little bit. Now you can pump
up your tire easily.
After you have pumped up the tire to the de-
sired pressure pull off the pump knob. Secure
the valve by turning the knurled nut on the
threaded rod properly against the valve body.
Finally put on the valve cap again.
When you exchange tires please note the
maximum width limit of 50 mm (approximate-
ly. 2 ").You have to use tires of ISO size 406
(20") on all wheels.The tire width possible at
your bicycle depends on the size of your rims.
Please ask your local dealer.
After you have exchanged the tires please
check if the wheels turn freely and check the
minimum distance between mudguards and
frame.
The spokes of the wheels connect the rim to
the hub.They transmit the braking power of
the disc brakes, and in addition they transmit
the pedal forces at the rear wheel.
Wheels
Before pumping up the tire, you have to unscrew the little
knurled nut on the valve.
Danger!
Never pump up your tires beyond
the maximum pressure.The tire may burst
while riding or come off the rim, which may
result in a serious fall and injury.
Danger!
Check your tires for damage on a
regular basis.You should exchange tires with
worn threads or damaged sidewalls.
Damaged rim tapes have to be exchanged
immediately. Damages at the tires may lead
to a sudden burst of the tire and thus result
in a serious fall and injury.
