Appropriate Wheel Offset for 18" Wheels?

moparlover said

this little tool, $75 bucks, will tell you exactly what size you need and can save you $100's if not $1000's

http://www.summitracing.com/parts/php-01201

Click to expand...

I've seen that before. I never bought it because I thought I'd never use it more than once. Plus, my entire front suspension is out of the car right now so it's hard to measure at the moment.