How do you measure wheel offset and backspacing?

Offset is simply the distance from the hub mounting surface to the center of the wheel. In other words, Offset = Measured Backspace – Calculated Wheel Center Distance. In this example, we already know that our Measured Backspace = 5 3/16 inches.

What is 4.5 backspacing on wheels?

MM OFFSET TO BACKSPACE IN INCHES

BACKSPACE	3.25″	4.5″
7.5″	-25	6
8″	-32	0
8.5″	-38	-6
9″	-44	-12

Is wheel offset and backspacing the same thing?

The truth is, they’re essentially two different ways to measure the same thing: how your wheels fit your ride. Wheel offset is the distance from the mounting surface to the centerline of the wheel. On the other hand, backspacing is the distance from the mounting surface to the wheel’s back lip.

Where is the offset stamped on a rim?

Nearly every wheel has the offset stamped on it somewhere, usually ingraved on the wheel as a part of the wheel markings (e.g., 6½ J x 15 H2 5/112 ET39 – ET39 means 39mm offset) and its measurement unit is millimeter (mm). The wheel offset can have zero, positive or negative value.

What offset 6.5 backspacing?

Backspacing to Offset Conversion Chart

Back- spacing	3.25 in.	6.0 in.
5.5 in.	0	69
6.0 in.	-6.4	63
6.5 in.	-12	57
7.0 in.	-19	51

What does 11R22 5 mean?

Aspect Ratios The height of the tire from rim to tread will be 88 percent of the width. An 11R22. 5 tire will be approximately 11 inches wide and 9.5 inches high. Low profile tires show the width in millimeters and the aspect ratio.

What is negative 44 offset?

A negative offset gives an inset or deep-dish look: -44 is deeper than -12. The wheel will also stick out from the truck. Keep in mind that some states require fender flares to cover the width of the wheel and tire.

How much backspacing do I need?

Most aftermarket off-road wheels have between 3.5 and 5 inches of backspacing. A wheel with more backspacing will tuck under the fenders better than a wheel with less backspacing. Also, too little backspacing can cause darty steering and other handling issues.

How much offset is 5.5 backspacing?

Backspacing to Offset Conversion Chart

Back- spacing	3.25 in.	5.5 in.
Wheel Width	Offset (mm)
5.5 in.	0	57
6.0 in.	-6.4	51
6.5 in.	-12	44

What does P265 mean?

Let’s take for example P265/60R18. This code gives you the following information about your vehicle’s tire: P = Passenger Tire (Light Truck Tires will begin with the prefix LT). 265 = Section Width in millimeters (measured at the widest part of the tire from sidewall to sidewall)