911 Carrera Cabriolet (997) F6-3.6L (2007)
1.3.
Surface roughness (Sr) = 72 microns -see illustration- (view 1)
Surface roughness (Sr) = 72 microns -see arrow- (view 2)
Borderline disc, which can still just be evaluated as OK. As a result of more advanced damage to the surface, the depressions are larger, and above
all deeper, compared with the previous surface condition.
On the one hand, the more extensive roughness is noticeable (only when a comparison is made); on the other hand, however, like before, "only"
depressions are observed.
Replacement not yet necessary!
2. Worn brake discs:
2.1.
Surface roughness (Sr) = 108 microns -see illustration- (view 1)