Removing Tubular Tyres; Mounting Tubular Tyres - Canyon road bike Manual

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 make sure the 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 it without dismounting the
wheel and without removing the tube. Inflate the
tube, leave the valve sticking in the rim and first
look for the hole where the air is escaping. 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 TUBULAR TYRES

Deflate the tyre completely. To dismount the tyre,
start opposite the valve by pushing the tyre to the
side until a gap appears and the tyre starts to come
off. If the tyre remains tight, stick a tyre lever into the
gap and lift the tyre off the rim.
Replacing an individual tube is impossible. Instead
you have to mount a complete tubular tyre. En route
the tyre cannot be glued and is consequently not tight
on the rim even when inflated.
Therefore, be sure to ride back very slowly and care-
fully by taking the shortest way possible. Back home,
you have to glue the tubular tyre, as described in the
following.

MOUNTING TUBULAR TYRES

To mount a tubular tyre properly so that it durably
stays in place you should take yourself some time
and proceed stepwise. A little practice and experi-
ence with the glue and tubular model you are using
can speed up the job.
Tubular tyres can be glued either with liquid tyre glue
or with adhesive tapes. One advantage of using tape
is that it can be done fairly quickly. However, this may
not always give a sufficiently firm bond of the tyre on
the rim. In the event of a roadside puncture the tape
will often cling to the dismounted tyre and your spare
tyre may not bond to the rim sufficiently well.
A better alternative, therefore, is to glue the tyre to
a generous bed of several layers of liquid tyre glue.
Glue not only gives a firmer bond, it usually also re-
mains on the rim when dismounting the tyre.
PUNCTURE WHEELS 79
Roll off the tyre until there is a gap
Use a tyre lever to remove the tyre
Tubular tyre glue
If your bike has carbon rims, you have to
i
use special tubular tyre glue (e.g. from
Continental). Be sure to read the operating in-
structions of the manufacturer of tubular tyre
glue for carbon rims before applying it.
A poorly glued tubular tyre can come off
the rim. Risk of an accident!