Parts of a Wheel

Offset - the distance from the center line of the rim width of the wheel to the surface of the mounting face which touches the brake disk (measured in millimeters). The offset is indicated with a "+" when the fitting surface extends beyond the center line such that the wheel goes inwar5ds towards the vehicle. It is indicated in "-" when it falls below the center line such that the wheel goes outwards from the vehicle. It is critical to use the proper offset for your wheels to ensure that there is no contact made to the wheel fender and to the suspension parts even when wheels are fully turned.

Hub Bore, Bolt Pattern and P.C.D.

The number of bolts on a wheel varies depending on vehicle type. As such, the wheels that you purchase should clear the hub bore and match the bolt pattern and pitch circle diameter(PCD) of your vehicle. The PCD indiscates the diameter of the circle in millemeters conneting the center of each hub bolt. The number of bolts varies from 4 to 6 bolts in most common cases.

Fender Clearance

Fender clearance is essential to ensure that the wheels (and tires) do not rub against the fender, inner fender linings and wells. When checking for clearance, consider the suspension travel and turning radius of the wheels. Note that lowering springs, camber and caster settings may affect clearances hence these must be confirmed prior to choosing the wheels to purchase.