Registered Forum User
Ducati Corse
Posts: 3,921
Join Date: Jun 2001
Location: Drayton Bassett, Staffs
Mood: Tad more confident
DJ, you can tell at a glance if your disc's re worn. There will be a ridge around the inner and outer edge of the rotor where the pad makes contact. If you estimate this to be excessive, then you can pull out the verniers for a more acurate measurment.