Originally Posted by PureVenom
Something doesn't look right in that statement....
oops sorry, fixed now.
Your back spacing should be max 6 - 6.5 inches~ max. You will probably have to figure that one out for yourself, just take the rim face down and then take something flat and sit on its back across it. Measure from there down to the back of the rim where the rim will meet the rotor, thats your back spacing (dont include the items width in your measurements)
To calculate offset you'll need the following measurements:
- Calculated from above
- 7.5 inches
Wheel Center line
(outboard flange to inboard flange measurement / 2) probably wider than 7.5 inches, basically the far edges
Wheel center line from Wheel backspace to get offset.
If backspace is less than the wheel center line the offset is negative
If backspace is greater than the wheel center line the offset is positive
As far as fitment goes... the wheel is 19mm positive offset by your info, stock on the mustang is 24mm as far as I know, so they are close.
I dont know your wheel center line but say its 4 inches then the offset is 19mm toward the outside (front of rim) from the 4 inch mark. So... 4 inches - 19mm is 3.25 inches. That means that the rim sits past the rotor 4.75 inches.
With that said a stock 17x8 gt rim is about the same, it will sit in more of course but not much. The only issue you may run into is brake caliper clearance~ but you should be ok. Just mount the rim and see how it spins. And make sure visually you like how the rim sits, not to far in the fender.
If the rim sits in to far they make spacers for them, but not far enough... thats the only problem I see you having that cant be easily fixed.