wheel measuring help

[Lonnies Performance]

In theory... yes. If both the tire & wheel are 2" wider, adding 2" backspace will keep the outside of the tire where it is currently.
Are you certain there is 2" clearance everywhere at the inside?



Also, I'm not sure if you are using the same wheel brand/style, but will the wheel clear the caliper without the spacer?
You can try using your present wheel/tire combo without the spacer to verify inside fitment.