Wheels
HP
Velotechnik
47
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Unmounting and mounting the wheels
Wheels are fixed to the bicycle fork or rear
dropouts with quick releases or nuts on the
axles.
When using V-brakes, release the brake ca-
bles by pushing the brake blocks to the rim.
On hydraulic brakes, remove the brake cali-
per if possible or deflate the tire.
Pay attention to the manual of the brakes
manufacturer in any case.
Attention!
On rear wheels with de-
railleur system switch to the smallest
sprocket.
On rear wheels with hub gear system or
coaster brake it may be necessary to remove
other parts. Please read the manufacturers
manuals.
Assembling the wheels follows the described
steps in reverse order. Make sure the wheels
axle is in the right position of the forks or
frames dropouts.
Be careful when assembling wheels with disc
brakes. Do not damage the brake pads when
inserting the brake disc into the caliper.
Danger!
When reassembling the
wheel check the table of tightening torques
on page 72 or information about quick
release levers on page 9.
Reassemble the brake cables or calipers im-
mediately after service and check their func-
tion.
Tires and tubes
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
desired 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.
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 inju-
ry.
When you exchange tires, please note the
maximum width limit of 50 mm (approximate-
ly 2 ").
On the front wheel you have to use tires of
ISO size 406 (20"). On the rear wheel of
Grasshopper fx you have to use tires of ISO
size 406 (20").
On the rear wheel of Speedmachine and
Streetmachine Gte you have to use tires of
ISO size 559 (26").
After changing the tires please check if the
wheels turn freely and check the minimum
distance between mudguards and frame.
Wheels