Aftermarket wheels are easily among the most popular vehicle upgrades.
Available in a seemingly endless amount of designs, finishes, and sizes, wheels can change the entire look of a car or truck and can even effect performance, depending on their weight. Although appearance, weight, and construction are important factors in choosing the right wheels, none of it truly matters if your wheels don’t fit.
That’s why we put together this quick guide to measuring wheel bolt pattern and backspacing. Along with our articles on wheel offsets and wheel/tire plus-sizing, this information will help you take essential steps toward selecting the right wheels for your ride.
How to Measure Wheel Bolt Pattern
Also called bolt circle, bolt pattern is an expression of the number of wheel studs and the distance between them. To measure your bolt pattern, pick the illustration below that represents your wheel stud pattern and measure as described below each illustration.
How to Measure Backspacing
Backspacing is the distance between the back of the rim flange and the mounting pad (where the hub attaches). Using the illustration below as guide, measuring backspacing is a simple two-step process.
- Take a wheel off your car and lay it on a flat surface with the back (the side that faces the brakes) facing up.
- Lay a straightedge across the wheel and measure down to the mounting pad (you may have to deflate the tire to do this). This distance is your backspacing.
Armed with your wheel’s bolt pattern and backspacing, you’re ready to find a wheel design and size truly befitting your vehicle.
[…] out this articleto see what backspacing looks like and how to measure […]
[…] The second in our series of “Wheel/Tire Month” videos, this video covers the importance of wheel bolt pattern and provides a basic overview of the main types of lug nuts: conical-style and shank-style lug nuts. It also gives you an example of how to measure bolt pattern on one of the most common wheel configurations. You can learn how to measure bolt pattern on other common wheels, by viewing our post on How to Measure Wheel Bolt Pattern and Backspacing. […]
I have a 1967 Chevy C-10 Step-side Pickup and I want to put American Racing Torque Thrust – D wheels 15 X 10 what kind of back spacing will I need?