Technical Standards EUWA ES-3.17 Method of Measuring Disc Flatness on Truck Wheels

This EUWA – Standard specifies measuring diameters and a suggested method
to be used to measure disc flatness on truck wheels.
Brake drums or brake discs may be distorted when a wheel with an uneven
attachment area is mounted.
Extent and shape of distortion are influenced by the flatness of the disc.
Especially “roof shaped” discs may influence brake vibrations.
The specification indicated hereafter do not imply that the wheel is
interchangeable from one vehicle to another.

EUWA ES-3.17 Method of Measuring Disc Flatness on Truck Wheels