Canyon Mountain bike Manual page 41

78 WHEELS PUNCTURE
Work the tyre into the rim by approaching the valve
symmetrically from both sides. Towards the end you
will have to pull the tyre vigorously downwards to
make the already mounted portion of the tyre slip
towards the deepest part of the rim base. This will
ease the job noticeably on the last centimetres.
Check again the proper seat of the inner tube inside
the tyre and press the last stretch of tyre over the
edge of the rim by using the balls of your thumb.
If this does not work, you will have to use tyre le-
vers. Make sure the blunt ends point towards the
inner tube and the inner tube does not get dam-
aged.
Press the valve deep into the tyre so that the in-
ner tube does not get caught between rim and
tyre beads. Does the valve stand upright? If not,
dismount one bead again and reposition the inner
tube.
To make sure the inner tube does not get pinched
between rim and bead, inflate the tyre a little and
then move it sideways back and forth between the
sides of the rim. While doing this you can also check
whether the rim tape has been displaced.
Inflate the inner tube only to the desired pressure.
The maximum pressure is indicated on the side of
the tyre.
Check the proper seat of the tyre by means of the
"witness line" on the side of the tyre just above the
edge of the rim. Make sure the witness line is even
with the rim edge all the way around the tyre.
Press the tyre to both sides to make sure the inner tube does not get
caught between rim and tyre beads
Witness line all around the side of the tyre
If you have a puncture en route, you can
i
try to repair the tube without dismounting
the wheel and without removing the entire inner
tube. Leave the valve sticking in the rim and first
look for the hole where the air escapes. Pump up
the inner tube. Bring the inner tube close to your
ear and watch out for hissing noises. When you
have found the hole, look for the corresponding
place on the tyre and examine it. Often you will
find the foreign body sticking in the tyre. Remove
it, if necessary.
REMOVING TUBELESS/UST TYRES
Deflate the tyre completely. Use your hands to press
the tyre from the sides towards the centre of the rim,
until both beads lie slack in the centre of the rim.
Start dismounting the tyre at the point opposite the
valve and lift one tyre bead with your fingers over the
edge of the rim. Slip the entire tyre bead over the rim.
Then pull the other bead off the rim, as well.
REPAIRING TUBELESS/UST TYRES
In the event of a puncture tubeless tyres also work
with an inserted inner tube. First remove the perfo-
rating object from the tyre. Dismount the valve from
the rim, as well. Insert a slightly inflated inner MTB
tube into the tyre. Mount the tyre as described above
and make sure it is properly seated in the rim and in-
flated to the specified pressure. Tubeless tyres can
be sealed on the inside with a conventional repair
patch. Follow the operating instructions of the repair
kit manufacturer.
PUNCTURE WHEELS 79
Press the tubeless tyre towards the centre of the rim
Improper mounting may cause malfunc-
tion or even brake failure. It is therefore
absolutely necessary to follow the manufacturer's
operating instructions enclosed with the delivery.