4.50" backspace wheels need spacers?

[JTPatriot]

Who is running 38x13.5/17 tires with wheels that have -12mm offset (4.5")? Do you need any spacers to prevent rubbing? I am running 12.5" wide tires right now with a 3" inch lift and have no rubbing but going to a 13.5" wide tire and need to know.

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[Rahkmalla]

37x12.5 on +25 won't rub inside. -12 is an inch and a half further out than +25, meanwhile you're only going an inch wider which means half inch inside. So your wheels will start an inch further out than you old one.

By the way, there is no such thing as needing a spacer, it's called needing new wheels.