04-02-2013, 08:49 PM
Have a look on google for info on wheel offset. Its basically the difference between the centre of the wheel and where the face is that bolts to the hub. So et0 means the face is on the centre of the wheel and on an 8j wheel you will have 4 inches out and 4 inches in from the hub. Et30 will move the wheel into the arch 30mm, et-20 will move it out 20mm etc.
By adding spacers to the back of the wheel you move the point that it bolts to the hub down, so reducing the the et.
By adding spacers to the back of the wheel you move the point that it bolts to the hub down, so reducing the the et.