Ducati MULTISTRADA 1100 S Use And Maintenance Manual page 80

Minimum tread depth
Measure the tread depth (S, fig. 81) 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
Visually inspect the tyres at regular intervals for 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 stuck in the
tread.
S
E
fig. 81
79