Maintenance
149
Tire Wear
As the tire tread wears down, the tire
becomes more susceptible to punctures
and failure. It is estimated that 90%
of all tire problems occur during the
last 10% of tread life (90% worn). It is
recommended that tires are changed
before they are worn to their minimum
tread depth.
Minimum Recommended Tread
Depth
Warning
Riding with excessively worn tires is
hazardous and will adversely affect
traction, stability and handling which
may lead to loss of control and an
accident.
When tubeless tires, used without a
tube, become punctured, leakage is
often very slow. Always inspect tires
very closely for punctures. Check the
tires for cuts, embedded nails or other
sharp objects. Riding with punctured
or damaged tires will adversely affect
motorcycle stability and handling
which may lead to loss of control or an
accident.
Check the rims for dents or
deformation. Riding with damaged or
defective wheels or tires is dangerous
and may lead to loss of control and an
accident.
Always consult your authorized
Triumph dealer for tire replacement, or
for a safety inspection of the tires.
In accordance with the periodic
maintenance chart, measure the depth
of the tread with a depth gage, and
replace any tire that has worn to, or
beyond the minimum allowable tread
depth specified in the table below:
Under 80 mph
(130 km/h)
0.08 in (2 mm)
Over 80 mph
(130 km/h)
Front 0.08 in (2 mm)
Rear 0.12 in (3 mm)
Rear Tire Only
When checking the rear tire wear, it is
important to note that part of the rear
tire tread pattern looks like a tire wear
indicator. The actual tire wear indicator
has the letters 'T.W.I.' on it, as shown in
the illustration below.
B00903
T.W.I.
T.W.I.
2
1
1. Tire Wear Indicator (TWI)
2. Rear tire tread pattern
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