69
tyre puncture
Flat tyres are the most common cause of puncture during cycling. How-
ever, as long as you have the necessary tools and a spare tube or a
repair kit, this need not mean the end of your cycle ride. If your wheels
are attached with quick-releases to the frame and the fork, you only
need two tyre levers and a pump
(a)
.
I
Before removing a wheel, read the chapters
“wheel moun-
ting”
and
“how to use Quick-releases and thru axles”
. If
you are in doubt or if you have any questions, then contact
your WHEELER bicycle dealer.
U
You can find information on removing the rear wheel of your
WHEELER pedelec in the chapter
“removing and installing
the rear wheel”
in your BionX system operating instruc-
tions.
WHEEL REMoVAL
If your bicycle has
mechanical rim brakes
(V-brakes) you first have to
unhook the brake cable from the brake arm
(b)
. To do this, grip the rim
with one hand and press the brake pads and/or arms together. In this
position the usually barrel shaped nipple of the lateral brake cable or the
brake hose (of V-brakes) can easily be disengaged.
If
disc brakes
(hydraulic or mechanical) are fitted, see first where the
brake pads and their wear indicators (metal lugs/projections) are seat-
ed. Later you can tell from them whether the pads are still at the proper
place after removal. Read the instructions of the brake manufacturer,
which you can find on the enclosed CD.
If you have
derailleur gears
, you should shift the chain to the smallest
sprocket
(c)
before removing the rear wheel. The rear derailleur is now
completely outside and does not get in the way of dismantling.
With some Shimano rear derailleurs you must move the shifter
(d)
downwards from the “on” position.
Open the quick-release of the wheel, as described in the chapter
“how
to use Quick-releases and thru axles”
.
If you cannot remove the front wheel after releasing the lever, this is due
to the drop-out safety tabs. They come as metal catches which engage
with recesses in the drop-outs
(e)
. Just release the quick-release ad-
justing nut a little and slip the wheel past the tabs.
You will find it easier to remove the rear wheel, when you pull the rear
derailleur slightly backwards
(f)
. Lift your WHEELER bicycle off the
ground and give the wheel a gentle tap with your hand so that it drops
out.
G
Rotors can become hot, so let them cool down before re-
moving a wheel.
G
If you purchased a WHEELER bicycle with hydraulic disc
brakes, never turn your bicycle upside down for repair work,
i.e. with the handlebars and saddle underneath
(g)
, as the
brakes will fail otherwise!
A
Never pull the (disc) brake lever while a wheel is removed
and always make sure that you fit the safety locks before
removing the wheel.
A
In the case of drum and roller brakes as well as of internal
gear hubs you must release the torque arm that takes up
the drive and brake forces to the frame. The shift cables
and the click box must also be dismounted before wheel
removal.
I
Comply with the instructions of the brake and gear manu-
facturers, which you can find on the enclosed CD.
CLINCHER AND FoLDING TYRES
Tyre Removal
Remove the cap and the fastening nut off the valve and deflate the tyre
completely. Press one tyre side from the rim sides towards the centre
of the rim. This will ease the removal.
Apply a plastic tyre lever under one bead of the tyre about 5 cm away
next to the valve
(h)
and lever the tyre out of the rim in this area. Hold
the tyre lever tight in its position. Slip the second tyre lever between rim
and tyre at a distance of about 10 cm on the other side of the valve and
lever the next portion of the bead there over the edge of the rim.
a
b
c
d
68
e
f
g
h
Summary of Contents for Cross
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