My wife bought me some XD Addicts 17X9 for Christmas (How cool is she?) But Discount Tire ordered an +18mm offset. I have seen everyone running -12 mm offset. What's the deal? I called and the guy said it's correct for my vehicle. What do you guys think before I go to have them installed?
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2015 SR5 White, Bilstein 5100's, 17X9 XD Addict Rims, Plasti-Dip Front and Rear Emblems
If you're keeping it stock, you'll be fine. However, it will look better with a negative offset. It will be required if you're lifting and getting larger tires.
It will have a very similar wheelwell position as stock wheel, with a pos 18mm. (tucked inside fender)
Offset from 0 (wms at center of rim) to a more neg offset (WMS pushed further in from center of rim) will put your outer lip of wheel closer to outer wheelwell giving a wider stance. Too much pos offset will push tires out of wheelwell and spray dirt all over your side and arms if your windows are open- among other fitment issues.
0 to -12 for a 9"wheel will keep your tire just inside to flush with the fender.