What size socket do I need to remove my lug nuts?

There isn’t a single universal lug-nut socket size. Most passenger cars use 17mm, 19mm, 21mm (13/16"), or 22mm (7/8") sockets. Check your owner’s manual or measure the lug nut across its flats to confirm the exact size.

Lug nuts are sized by the distance across the flats of the nut, not by wheel diameter or bolt pitch. The correct size depends on the make, model, and year of your vehicle. Some trucks and SUVs use larger sizes, while certain European or Japanese cars may use smaller ones. If you don’t have a sizing tool handy, you can test-fit sockets from a typical metric/SAE set, starting around 17mm and moving up in small increments to find the snug fit. Always use proper safety practices when working on wheels.

Common lug nut sizes you may encounter

These sizes cover the vast majority of modern passenger cars and light trucks. If your vehicle isn’t listed here, check the manual or measure the nut directly.

• 17mm: Common on many European makes (some VWs, Audis, Mercedes) and certain Japanese models.


• 19mm: Very common across many Asian and European cars; seen on numerous Toyota, Honda, and European-brand wheels.


• 21mm (13/16 inch): Widely found on many American-made vehicles and some imports.


• 22mm (7/8 inch): Frequent on larger wheels, SUVs, and many trucks.


• Uncommon sizes (23mm, 24mm, or others): Some rare models or specialty wheels may use larger or smaller sizes; always verify.

In practice, many DIYers carry a compact socket set that covers 17–22mm in metric, and a 13/16" and 3/4" in SAE to handle most scenarios. Avoid forcing a socket onto a lug nut, which can strip the nut or socket and create a safety risk.

How to identify the correct lug nut size

Several straightforward methods help you confirm the right socket without damaging components.

• Look for size stamps on the lug nuts themselves. Some nuts indicate the across-flats size, but many do not have markings.


• Measure the nut across the flats with a ruler or caliper; the measurement (in mm or inches) is the socket size you need.


• Test-fit sockets starting with common sizes (17 mm, 19 mm, 21 mm, 22 mm) and choose the one that fits snugly with no wobble.


• Consult your vehicle’s owner manual or a repair guide for model-specific lug nut specs.

Tip: Use a six-point socket rather than a twelve-point style for better grip and to reduce rounding, especially when loosening tightly torqued lug nuts. For safety, apply a breaker bar if needed and ensure the vehicle is stabilized on a flat surface with wheels chocked.

Safety and best practices

Always follow safety practices when working on wheels. Loosen lug nuts slightly while the car is on the ground, then lift the vehicle and support it with jack stands before fully removing the wheel. Retorque lug nuts to the manufacturer’s specification after reinstalling the wheel using a calibrated torque wrench. If you’re unsure or encounter damaged lug nuts or studs, seek professional assistance.

Summary

Most lug nuts on modern vehicles fit one of a few common socket sizes—17 mm, 19 mm, 21 mm (13/16"), or 22 mm (7/8"). Size varies by vehicle, so verify with the owner’s manual or by measuring the nut's across-flats. Carry a small set that covers these sizes, identify the correct socket with careful measurement or fitting, and always follow safety precautions when removing or reinstalling wheels.

Which is bigger, 13/16 or 21mm?

21mm = just over 13/16 inch. 22mm = almost 7/8 inch. 23mm = 29/32 inch. 24mm = just over 15/16 inch.

What size socket do I need to take off a lug nut?

The most common socket sizes for lug nuts are 19mm or 21mm, but sizes can vary by vehicle. A 13/16-inch socket is often the correct imperial size, as it's very close to 21mm. To ensure the correct fit, check your vehicle's manual, or bring a lug nut to a hardware or auto parts store to get the right size socket. A 1/2-inch drive socket wrench is recommended for its torque capacity.
 
Common lug nut socket sizes

• Metric: 19mm, 21mm (most common), 17mm, 22mm
• Standard: 13/16 inch (often fits 21mm lug nuts) 

How to find the right socket size

• Check your owner's manual: This is the most reliable way to confirm the correct size for your specific vehicle. 
• Measure or bring a lug nut: If you don't have your manual, take one of the lug nuts to a hardware or auto parts store to find the correct socket size. 
• Use a socket set: Consider getting a set of sockets specifically designed for lug nuts, which often includes both common metric and imperial sizes, like those from TEKTON Hand Tools. 

Tips for removing and installing lug nuts

• Use a 6-point socket: A 6-point socket is less likely to round off the corners of the lug nut compared to a 12-point socket. 
• Use a deep-wall socket: Deep-wall sockets are designed to fit over the lug nut and are often necessary when the nut is recessed within the wheel. 
• Choose the right drive size: A 1/2-inch drive is recommended for lug nuts because it can handle the higher torque often required for tightening them properly. 
• Use a torque wrench: Always use a torque wrench to tighten lug nuts to the manufacturer's specifications to ensure proper and safe installation. 

Are all lug nuts 17mm?

The three most common hex sizes for lug nuts are 17 mm, 19 mm, and 21 mm, while 22 mm, 23 mm, 11⁄16 inch (17.5 mm), and 13⁄16 inch (20.6 mm) are less commonly used.

Is a 7/8 wrench the same as 22mm?

A: 22mm = 0.866", which essentialy is a 7/8" socket. A 7/8" socket will work on a 22mm lug nut, but it can feel a little loose. The other way around, a 22mm can work on a 7/8" lug nut, but it can be really snug, which is not bad.