The question of wheel offset comes up quite often as rubber becomes less available for 15" wheels.  Many Pantera owners buy newere 17", 18" or even larger wheels.  But what should the offset be?  Easy to figure out if you use the same rim width, but what if you want to move up to those steamroller tires you saw recently?  Well, you have to recalculate the offset.

Kirby Schrader found this neat offset calculator on the Intenet:

http://www.gtsparkplugs.com/WheelOffsetCalc.html

Later on, I'll try to get some information about the stock wheel sizes and offset in here or in the Wiki.