Registered Forum User
Ducati Corse
Posts: 3,134
Join Date: Jan 2002
Location: notts
Mood: Bloo and Yellow.. and Red now ;)
Visual check is all that can be done really, although if they are u/s then you'll see it.
Watch for the rubber delaminating away from either the center stud or the outer steel shell. Bad crazing or splitting of the rubber is also a good enough reason to swap them out.