Honda CRF230F Owner's Manual page 41

Tyre Replacement
The tyres that came on your motorcycle
were designed to match the per formance
capabilities of your motorcycle and provide
the best combination of handling, braking,
durability and comfort.
WARNING
!
Installing improper tyres on your
motorcycle can affect handling and
stability. This can cause a crash in which
you can be seriously hurt or killed.
Always use the size and type of tyres
recommended in this owner's manual.
30
The recommended tyres for your motorcycle
are:
Front: 80/100-21
80/100-21 M/C
Rear: 100/100-18
100/100-18 M/C
Whenever you replace a tyre, use one that is
equivalent to the original and be sure the
wheel is balanced after the new tyre is
installed.
Also remember to replace the inner tube
whenever you replace a tyre. The old tube
will probably be stretched, and if installed in
a new tyre, it could fail.