Honda PCX 150 Owner's Manual page 235

Maintenance Fundamentals
Inspecting Tread Depth
#
Inspect the tread wear indicators. If they
become visible, replace the tyres immediately.
For safe riding, you should replace the tyres
when the minimum tread depth is reached.
or TWI
Wear indicator
location mark
78
WARNING
3
Riding on tyres that are excessively
worn or improperly inflated can cause a
crash in which you can be seriously hurt
or killed.
Follow all instructions in this owner's
manual regarding tyre inflation and
maintenance.