Honda VTX1300T 2009 Owner's Manual page 137

Also, if you hit a pothole or hard object
while riding, pull to the side of the road as
soon as you safely can and carefully
inspect the tires for damage.
Tread Wear
(1)
(1) wear indicator
(2) wear indicator location mark
For the best performance, you should
replace a tire before the tread depth at the
center reaches the following limits:
front
rear
If the wear indicators are visible, replace
the tire immediately as it is no longer safe.
(2)
0.06 in (1.5 mm)
0.08 in (2.0 mm)
Servicing Your Honda
Tires
129