F 250 2WD Pickup V8-7.3L DSL Turbo VIN F (1994)
Rotor thickness should be measured at the thinnest point on the rotor. Any rotor which is worn below its minimum thickness should be replaced.
For accurate measurements, it is best to remove the caliper to allow for complete access to the inboard side of the rotor.
For more information on how to use a disc brake micrometer see Fundamentals and Basics.
PARALLELISM
Parallelism is the measurement of the thickness of the rotor at 12 or more points around the circumference of the rotor. All measurements must be
made at the same distance in from the edge of the rotor.
Lack Of Parallelism