Ducati SPORT TOURING ST3 Manuel D'utilisation Et Entretien page 164

Checking brake pads for wear
Front brake (fig. 68)
To facilitate inspection without removing the pads from
the calipers, brake pads have a wear mark. If the grooves
in the friction material are still visible, the pad is still in
good condition.
Rear brake (fig. 68)
The friction material on each pad should be at least
1 mm thick.
Important
Have the brake pads replaced at a Ducati Dealer or
Authorized Workshop.
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MIN
1 mm
E
fig. 68
67