alloy wheels

[david roy powel]

dear sir. how do i calculate the et no. of my non mercedes alloy wheels.thank you.

 

[A210AMG]

Hello

It maybe stamped on the inside of the alloy on the spokes, could be dirty but usualy its on the alloy somewhere.

 

[Mactech]

The ET is the distance in mm from the mounting face to the centreline of the wheel.
Measure overall the width of the wheel then divide by two to get the position of the C/L. Then measure the distance of the mounting face from the outer wheel face. The difference is the ET.