Wheel offset math?

Looking to order up a set of wheels. Doing the math, the front will work with 12mm offset for 8? rims. Putting the tire 1/2? inside the fender lip; assuming tire is 225 with 8.9? cross-sectional width.

For the rear, using same 8? width rims and 225 tires, I?m getting a negative offset of -10 to -12 so that tire fits within the 1/2? of fender. This is due to the narrower rear track.

I haven?t heard anyone referencing negative offset rear wheels. Are people using spacers to achieve the same effect rather than getting wheels built for the application?

Thanks much.
B.

I think there is a mix of spacer, spacer-adapters and just pick a width and offset that works out of the box.

I used this website to calculate my setup, it was great for visual reference because of how close my wheels were going to be to the strut towers.

https://www.willtheyfit.com/

I'm running Fifteen52 Wheels - 17x9 ET40 5x120 - Used with a set of spacer-adapters that are 5x108 to 5x120 and 40mm thick. I was able to get great fitment with minimal rolling of the rear fenders, no rolling of the front fenders and a really good ride quality.

What car

James M said:

What car

Click to expand...

?88 240 wagon.