The measurement information on the wheel incluedes the size, ET and weight, they are present in different forms. And these parameters are very important factors for you to consider when you are trying to bug or choose a wheel.
Most of time you can find the measurement information on your wheels, it’s usually cast, stamped, or machined on the rear face of the spokes of your wheels.
The measurement information usually includes the size, ET, and weight.
The size is present as a “ number x number”, for example, “15x6J”. “15”is the diameter of the wheel, “6”is the width of the wheel, and “J” indicates the bead seat type.
The offset is marked as “ET”, and is either a positive number or a negative number. The positive number indicates that the center line is behind the hub mount plate(mounting face), and the negative number indicates that the center line is in front of the hub mount plate.
The weight is present as a “ number” following by the unit “kg”.