Disc type

Self-ventilated

Self-ventilated

Self-ventilated

Self-ventilated

Disc diameter (mm)

280

280

300

300

Nominal thickness (mm)

23.9 ÷ 24.2

27.9 ÷ 28.2

23.9 ÷ 24.2

31.8 ÷ 31.1

Minimum thickness after grinding (mm)

22.25

26.25

22.25

30.25

Minimum permitted thickness (mm)

21.9

25.9

21.9

29.9