Originally Posted by HighRollerII
so when people lift there trucks and get some more backspacing..what are they doin..adding like shems..like spacers?
More backspacing pushes the inside of the wheel inward. Less pushes it outward. If you look at the diagram above, you will see why. How much backspacing a wheel has is totally dependent on the wheel itself. The only way to get more is to change to a different wheel.
Sometimes, people will install wheels with too much backspacing, as is the case with many Mustang wheels when used on Rangers. To compensate, they might install spacers or adapters to push the wheel outward but that doesn't change the actual backspacing of the wheel itself.