Front
| G - Light Duty / Gas | G - Heavy Duty / Gas | |
| Nominal Thickness | 1.28 Inch (in) | 1.54 Inch (in) |
| Minimum Refinish Thickness | 1.23 Inch (in) | 1.48 Inch (in) |
| Minimum Replacement Thickness | 1.215 Inch (in) | 1.465 Inch (in) |
| Thickness Variation (Parallelism) | .0005 Inch (in) | .0005 Inch (in) |
| Runout (TIR) | .003 Inch (in) | .003 Inch (in) |