SECTION H14
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TIRES
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Tire changing is largely a matter of technique
and what to the layman may seem a difficult task is
perfectly straightforward when the correct
technique is followed. To change either tire, the
wheel must be removed. See Sections
H6&8forfrontwheelremovaland Section H1 for rear
wheel removal. The same basic principles apply for
all types of tire - lubricate the headings such as
with soapy water, to allow the headings to slip
easily over the rim, use heel pressure wherever
possible in preference to tire levers for easing
the tire on to the rim and minimise the risk of
damage by "nipping" and ensure that the opposite
side of the tire is pressed well into the rim well
to provide maximum freedom where the beading is
being slid over the wheel rim. Note: that the rear
tire only has one security bolt to prevent tire
"creep" such as under hard acceleration. No
security bolt is fitted to the front tire. For this
reason separate routines are given for front and
rear tires. The full technique is as follows:
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Removing Front Tire (No security bolt)
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1
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Remove the dust cap from the valve and using a
suitable notched type of cap or removal tool,
unscrew the valve core to deflate the tire
completely.
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2
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Remove the knurled ring securing the valve at
the rim. Store the cap, core and knurled ring clean
for re-use.
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3
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Lay the wheel down, if possible on a clean
surface to avoid scratching and, also to prevent
damage to the front axle. In the case of a disc
brake wheel, leave the disc uppermost.
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4
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Tread the tire beading away from the rim - after
a great deal of service the tire beading has a
tendency to stick.
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5
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Brush a lubricant such as soapy water onto the
tire beading and rim and also dip the tire levers
(two short ones are recommended) in the solution
before each leverage.
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6
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Insert the first lever between the tire valve
and rim at the valve position, press the opposite
side of the tire down into the rim well and apply
leverage (see Fig. H18).
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7
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Insert the second lever approximately 4
in. (100 mm) from the first and lever the
tire beading over the rim.
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8
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Remove the first lever and re-insert at the next
stage, continuing round the rim a little at a time
(see Fig. H19) until the beading can bepulledclear
of the rim.
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9
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Push the valve out of the rim and withdraw the
inner tube.
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10
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If it is required to remove the tire from the
rim, hold the wheel upright and apply pressure to a
lever inserted between the second beading and wheel
rim.
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