Ducati 749R Manuel D'utilisation Et Entretien page 169

Minimum tread depth
Measure tread depth (S, fig. 77) at the point where the
tread is most worn.
It should not be less than 2 mm, and in any case not less
than the legal limit.
Important
E
Visually inspect the tyres at regular intervals so as
to detect cracks and cuts, especially on the side walls,
and bulges or large stains that indicate internal damage.
Replace them if badly damaged.
Remove any stones or other foreign bodies caught in the
tread.
fig. 77
76