whats the least offset a wheel can have to tuck?

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hmmmm.... i have 22x8 with a +30 offset and they tucked in the front....barely.. slid by the inner fender lip and cleared.... so when i rolled my inner fenders they cleared fine... the rear on the other hand i would recommend another rearend.... pre 86 mazda sundowner or ford courier rearend and they will tuck with a +30 offset on an 8" wide wheel.