[Stormin08]

a high offset (Positive) usually means deep backspacing, a low offset (negative) means less back space and deeper dish.

think in the terms of a FWD car of a high performance car with the track width pushed out wide...you need a deep offset to get under the car. recent heavy duty trucks are receiving the same treatment...look at the newer gm hd trucks, wheels have like 6" BS. an 8" wheel that has 50mm positive offset / or 6" bs.