How to Find the Size of Your Lug Nuts

Knowing the exact size and type of lug nut that you need for your vehicle is extremely important. Without it, you may find yourself dealing with a number of issues, including stripped threads, uneven wheel mounting, or even worse – loose lug nuts. To make sure you have the right lug nuts for your car or truck, there are a few different methods you can use to determine your lug nut size.

Are lug nuts a standard size?

The answer is both yes and no. Lug nuts come in a variety of sizes, depending on the type of vehicle you have. While most cars use 14mm lug nuts, some require larger or smaller sizes – such as 12mm, 13mm or even 17mm. There’s no one-size-fits-all solution when it comes to lug nuts, so it’s important to know the exact size and type you need before buying any.

Do all lug nuts fit any car?

The size and model of lug nuts you need depends on the car model and which axle it uses. The correct lug nut seat also corresponds with the type of wheel you have. Conical or tapered lug nuts are most common, but ball/radius and flat-seat lugs are also used frequently.

Method 1: Check the Owner’s Manual

The first and most obvious solution to finding out the size of your lug nuts is to check your vehicle’s owner’s manual. All vehicles come with a manual which will contain detailed information about all parts, including the size of the lug nuts.

Method 2: Measure the Lug Nuts

If you don’t have access to your owners manual, or simply want an extra measure of certainty, measuring the lug nuts themselves is an effective way to determine their size. To do this, all you need is a ruler and some patience. Start by measuring the diameter of the lug nuts, and then measure their length. Once you have those two numbers, you can accurately determine which type of lug nut your vehicle requires.

Method 3: Take a Trip to the Parts Store

If all else fails, you can take a trip to your local automotive parts store and have them help you figure out the size of your lug nuts. Most stores have a wide range of sizes, which makes it easy to find the one that fits your vehicle. Once you’ve found the right size, all you need to do is purchase the correct amount and install them on your car or truck.

What are the different types of lug nuts?

Most aftermarket wheels require a specific type of lug nut to match the seat on the new wheel. The three most common types are conical tapered, ball radius, and flat seat.


If you’re installing new wheels on your car or truck, it’s important to know the size and type of lug nut that you need. With the right information, you can make sure that your wheels are securely mounted and prevent any accidents or damage from happening. By following the steps above, finding out the size of your lug nut is easy and can save you time and money in the long run.

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