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I’m 95% sure there should be no issues, but I’m looking to put an OEM g-Snyder wheel that is 18x8.5 with 50+ offset with a 245/40/18 tire on the front of my 2006 GS300 AWD. Currently have a 18x8 gspyder with 45+ offset on the front.
Only reason is I had two staggered sets, which I turned into two square sets, and the wider wheels are in much better shape and currently being used for snow tires, so I figured I’d switch the tires now before the sale destroys the finish.
Offset wont matter with awd system, important thing is tire height matches front and rear. You stated your running 245/40/18 if your running that on all 4 tires you should be fine and not trigger awd faults. If you are running different tires I would verify them on an online tire calculator to see if they are less then around 10-15% difference more or less and dont quote me on the figures lol.