Owner's Handbook - Page 136

For BONNEVILLE T120.

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Maintenance and Adjustment
136
Tyre Wear
As the tyre tread wears down, the tyre
becomes more susceptible to punctures
and failure. It is estimated that 90%
of all tyre problems occur during the
last 10% of tread life (90% worn). It is
recommended that tyres are changed
before they are worn to their minimum
tread depth.
Minimum Recommended Tread
Depth
Warning
Operation with excessively worn tyres
is hazardous and will adversely affect
traction, stability and handling which
may lead to loss of control and an
accident.
When tubeless tyres, used without a
tube, become punctured, leakage is
often very slow. Always inspect tyres
very closely for punctures. Check
the tyres for cuts, embedded nails or
other sharp objects. Operation with
punctured or damaged tyres will
adversely affect motorcycle stability
and handling which may lead to loss of
control or an accident.
Check the rims for dents or
deformation. Operation with damaged
or defective wheels or tyres is
dangerous and loss of motorcycle
control or an accident could result.
Always consult your authorised
Triumph dealer for tyre replacement,
or for a safety inspection of the tyres.
In accordance with the periodic
maintenance chart, measure the depth
of the tread with a depth gauge, and
replace any tyre that has worn to, or
beyond the minimum allowable tread
depth specified in the table below:
Under 80 mph
(130 km/h)
2 mm (0.08 in)
Over 80 mph
(130 km/h)
Front 2 mm (0.08 in)
Rear 3 mm (0.12 in)
Tyre Replacement
All Triumph motorcycles are carefully
and extensively tested in a range
of riding conditions to ensure that
the most effective tyre combinations
are approved for use on each model.
It is essential that approved tyres
and inner tubes (if installed) fitted in
approved combinations, are used when
purchasing replacement items. The use
of non-approved tyres and inner tubes,
or approved tyres and inner tubes in
non-approved combinations, may lead
to motorcycle instability, loss of control
and an accident.
A list of approved tyres and inner tubes
specific to your motorcycle are available
from your authorised Triumph dealer, or
on the Internet at www. triumph. co. uk.
Always have tyres and inner tubes
fitted and balanced by your authorised
Triumph dealer who has the necessary
training and skills to ensure safe,
effective fitment.
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