D40 After market Rims

[justdrinkbeer]

the only down side with some of the wheels in the US is the offset. The ProComps and the American Outlaw wheels all stick out about 20mm on stock. That will have the wheels sticking just outside the wheel arch.Depending on your local regs this may or may not be legal

Can you explain what the offset means and what we should be looking for? Will they be able to tell me if they fit or will they just sell me them anyway? I guess my second idea of putting 285/75 muddies on em is probably gonna break some law too?