anyone know what the std backspacing is for and FW code 15x7 ralley rim?
It's the same as a "YH" Camaro Z/28 wheel; offset is +0.30".
so using reverse calculation that would put the backspacing btw 4.25 & 4.5"s?
With +0.3" offset, backspacing would be 3.8" plus the width of the rim flange from the inside bead seat to the outside edge of the flange.