Customers use spacers to widen the vehicles track, and to add space between the hub and wheel as to adjust for clearance issues. Hub centric rings added to in stock hub centric spacers will work to pilot aftermarket wheels. Given most four-wheel-drive vehicles are built with wheels which have numerically high backspacing from the factory, adding on a larger-than-stock tire can cause rubbing issues on suspension, frame, and even body components. Adding a wheel spacer will move the tire outwards from the vehicle, which can help tremendously with clearance and rubbing issues. Given spacers are considerably less expensive than a new wheel (and can be installed at home), they have become a popular upgrade.