JayArras

I often see questions on the forum from people who are wondering if the particular wheels that they have will fit on their car. A major source of confusion is offset, commonly referred to as "ET". Hopefully, the following explanation will help clarify this topic.
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• The smaller the offset number, the more the wheels will stick out. Conversely, the larger the number, the more they will be more tucked in.
• The ET offset numbers are in milimeters (mms), so going from say, ET34 to ET44 will tuck the wheel in 10 mms (about 0.4") or from ET44 to ET34 they will push them out about 10mms.
• Rims with too low an offset can cause troubles with the outside edge of the tire rubbing on the fender or wheel well. Rims with too high an offset can cause troubles with the inside edge of the tire rubbing on the suspension or wheel well.
• In the example above, 1/2" shouldn't matter much, but it does get a little tricky if the tire used is also wider than the old setup.
• Wheels with too high an offset can be fixed with spacers. Wheels with too low an offset are SOL -- you have to roll the fenders to keep them from rubbing.

Hopefully that helps! Two sites where you can find useful information concerning the differences between two sets of wheels are:
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• https://tiresize.com/wheel-offset-calculator/
• https://www.willtheyfit.com/