Ok, so I have 30mm spacers behind 16x7 +33et Boost alloys. I also have a set of P38 Mondials that are 18x8 +56et. In order to run the monorails they would require a very beefy 65mm spacer.
So:
Boost wheels are just about flush with the outer edge of my flares.
+33 et and a 30mm spacer makes the Boosts essentially a +3 et offset wheel.
+56 et and a 65mm spacer makes the Mondials essentially a -9 et offset wheel.
so this means that the Mondials will stick out an additional 25mm past my current wheels?
https://www.1010tires.com/Tools/Wheel-Offset-Calculator#
So:
Boost wheels are just about flush with the outer edge of my flares.
+33 et and a 30mm spacer makes the Boosts essentially a +3 et offset wheel.
+56 et and a 65mm spacer makes the Mondials essentially a -9 et offset wheel.
so this means that the Mondials will stick out an additional 25mm past my current wheels?
https://www.1010tires.com/Tools/Wheel-Offset-Calculator#