Help with ATV/UTV Tire & Wheel specs

Used for tires with metric sizing. This is the height of the tire's sidewall, expressed as a percentage or ratio of the tire's width. For example, if the tire size is 205/30 R12, the aspect ratio is 30% of the width (205mm) which calculates to 61.5mm of sidewall height.

Denotes if the tire is a radial or bias constructed tire.

Tires with a directional tire tread pattern are designed to roll in one specific direction. Directional tires may offer better performance in different conditions, but also cant be rotated from side to side without dismounting the tire.

The manufacturer's stated height or diameter of the tire based on their testing parameters. This is calculated by taking the total inflated circumference (not mounted on a vehicle) divided by mathematical Pi.

Denotes the Ply Rating which is an expression of the tire's strength and capacity. The higher the Ply Rating, typically the stronger the tire is.

The deepest measurement of distance between the top of the tread to the carcass of the tire. Typically measured in inches (decimal or fractional) or millimeters (mm).

The bead diameter size of the wheel required to mount a corresponding tire on.

The manufacturer's stated approximate width of the tire, while inflated. Typically measured in inches or millimeters (mm).

A combination of front (F) and rear (R) tire widths. Used to compare the width of the front tires to the width of the rear tires in a set.

Typically given in a two number system, a bolt pattern is the measurement of an imaginary circle formed by the lug holes at the center of your wheel. The first number indicates how many bolt holes the wheel has. The second number is the diameter of the imaginary circle around the holes and usually is represented in inches or millimeters (mm). For example 4/156 illustrates a bolt pattern with 4 bolts and a diameter of 156mm.

The distance between the two bead seat areas 180 degrees from each other. Many consumers think this is the measurement of the face of the wheel but it's not. The face of the wheel will measure larger than the wheel diameter.

Denotes the color or finish of a wheel.

Check out our blog post Wheel Offsets Made Easy for everything you need to know.

A combination of front (F) and rear (R) wheel offsets. Used to compare the offset of the front wheels to the offset of the rear wheels in a set. Some wheel sets may offer a different offset for the front and rear, but many will be the same. Wheel spacers can also be used to manipulate effective wheel offset.

Check out our blog post To Beadlock or not to Beadlock for everything you need to know.

Measured from the inner bead to the outer bead. Keep in mind the overall width of the wheel is wider than this.

A combination of front (F) and rear (R) wheel widths. Used to compare the width of the front wheels to the width of the rear wheels in a set. Some wheel sets may offer a different width for the front and rear, but many will be the same.