UTV wheels are measured by their diameter and width. The diameter is the distance across the wheel, while the width is measured between the inner bead seats. Another important measurement is the wheel offset, which shows where the hub mounting surface sits compared to the wheel's centerline.
Diameter: The wheel diameter is measured from one outer edge of the bead area to the other, usually in inches. This size is determined with the tire on, and since the tire bead covers part of the wheel, the measurement is often rounded down to the nearest inch, according to Tracks USA.
Width: The wheel width is the distance between the inner edges of the bead seats, where the tire bead sits. This measurement is also typically in inches.
Offset: Wheel offset is the distance between the hub mounting surface, where the wheel attaches to the vehicle, and the wheel's centerline. It is usually shown as two numbers, like 4+3. The first number is the distance from the hub to the inner edge, and the second is from the hub to the outer edge. A positive offset means the hub is closer to the front of the wheel, moving the wheel further inside the wheel well. A negative offset means the hub is closer to the back, moving the wheel further out. Zero offset means the hub is exactly in the center.
Bolt Pattern: The bolt pattern shows how the lug holes are arranged on the wheel's hub mounting surface. It uses two numbers, like 4x156. The first number is the number of lug holes, and the second is the diameter of the circle they form, measured in millimeters. For example, a 4x156 bolt pattern means there are four lug holes in a circle with a diameter of 156mm.



























