Car Rim Offset Calculator

Formula

To calculate the Car Rim Offset (CRO):

\[ CRO = MB - WCD \]

Where:

\(CRO\) is the Car Rim Offset in inches
\(MB\) is the Measured Backspace in inches
\(WCD\) is the Wheel Center Distance in inches

What is Car Rim Offset?

Car rim offset is the distance from the wheel's mounting surface to the centerline of the rim. It determines how the wheel sits in relation to the wheel well and fender. Proper offset ensures the wheel fits correctly, maintains proper handling, and prevents rubbing against the vehicle's suspension or bodywork.

Example Calculation

Let's assume the following values:

Measured Backspace (\(MB\)) = 6 inches
Wheel Center Distance (\(WCD\)) = 4 inches

Using the formula:

\[ CRO = 6 - 4 = 2 \text{ inches} \]

The Car Rim Offset is 2 inches.