Can you calculate the offset if you only have the backspace measurement?

Backspace for an 8 and 10 inch wheel is both 5.5"... ???

Have a look at this:

Compomotive

Ta!

have you got the wheels ?

you can just lay the wheel flat and measure from the floor to the mounting surface, turn it over and do the same from the other side
then take the difference of these and half it to get the offset

but that assumes that the rim thickness is tha same back and front


[Edited on 11/11/09 by mcerd1]