Wheel Locks: Do You Need Them and How They Work

A wheel lock is a lug nut or bolt that won't come off without its matching key. If you're running aftermarket wheels, yes, you want them. They're very hard to remove without the key, and that's usually enough to send a thief to the next car. Run one lock per wheel, tighten it last and loosen it first, re-torque after 25 miles (40 km), and keep the key and its registration code where you can actually find them.

What is a wheel lock?

A wheel lock works like a regular lug nut, with one difference: you need a special key tool to install it and to remove it. You swap one standard lug on each wheel for a lock, and nobody can pull that wheel with a normal socket.

McGard is the name most people know. Its one-piece locks are made in the United States to meet or exceed O.E.M. standards for safety and durability. The brand also supplies factory wheel locks to more than 30 car lines around the world. If your car came with an odd-looking socket in the glovebox, there's a decent chance it's one of theirs.

The chrome ones aren't just a quick dip, either. McGard's plating uses three layers of nickel under one layer of microporous chrome.

Quick note for anyone searching: LOCK OFFROAD is a wheel brand, not a wheel lock. If you landed here looking for LOCK OFFROAD wheels, that's where they live.

How does a wheel lock key work?

Instead of a hex, the lock has a pattern cut into it. The key is a socket with the mirror of that pattern on one end and a hex on the other. You set the key over the lock, turn it until the patterns engage, then put your lug wrench on the key's hex and turn.

On McGard keys, a steel collar guides the key into the lock pattern and holds it in line while you turn. That matters, because a key that slips off at an angle chews up both parts.

The patterns are computer-generated. The design allows an unlimited number of different patterns, and the extra-narrow grooves are cut to keep lock removal tools from getting a grip. Its keys also come in 8 different hex sizes, so the key matches the lug wrench that came with your car. That's exactly what you want on the shoulder at night with a flat.

One thing people get wrong: each set does not have a unique code. There are a lot of patterns out there, but your set isn't one-of-one.

Do you need wheel locks?

Police recorded more than 366,000 car-accessory thefts in 2016, and theft of tires, hubcaps and wheel assemblies went up 2 percent over the year before. Wheels come off fast with a jack and a lug wrench. A lock turns a quick job into a fight.

Our take is simple. If you've put real money into a set of wheels, run locks. On a winter beater with steelies, you can live without them.

Know what you're buying, though. Locks aren't guaranteed to be theft proof. What they do is make your car less of a target than the one parked next to it, and that's the whole game. If someone really wants your wheels, they'll do whatever it takes. Locks just make that a lot more work.

How do you install wheel locks?

It's a lug nut job with a couple of extra rules. Here's the order we'd follow:

1. Check the seat style. Lug nuts and bolts should match what the wheel maker recommends: flat seat, cone seat, radius seat, shank or cone-shank. Check the spare too.
2. Clean the studs. If they're rusty, hit them with a wire brush. Leave the studs dry, no lube.
3. Check thread engagement. The nut or bolt should engage at least as deep as the stud or bolt is wide. For lug bolts, the shank length has to match the bolt you're replacing. Too short can damage threads. Too long can stick out past the rotor and damage other parts.
4. Test-fit and look at the seat. Pull the fastener back off and check its seating surface. If the wheel didn't leave a mark on it, the nut may have bottomed out on the stud. That means it's the wrong nut for the car.
5. Torque the regular lugs first. Work in a progressive crisscross pattern up to the torque in your owner's manual. The lock goes on last.
6. Tighten the lock with the key. Use the key and a lug wrench to bring it to the torque in your owner's manual, and press straight in so the pattern stays square. A torque wrench and socket for the final pull is best.
7. Re-torque after 25 miles (40 km). Do the same for any newly installed lug nuts or bolts.

Wheel lock rules at a glance

Rule	What to do	Why
Locks per wheel	One	One per wheel does the job
Order	Last on, first off	-
Torque	Owner's manual spec	Your car's number, not a guess
Final tightening	Torque wrench and socket	Even, correct clamping
Re-torque	After 25 miles (40 km)	New fasteners need a second check
Thread lube	None	-
Impact gun	Don't	Over-tightens, ruins lock and key, can distort rotors
Thread engagement	At least equal to stud diameter	-
Open-end lug nuts	Install the nylon plugs for street use	Prevents thread corrosion
Registration label	In the glovebox	You need the code for a replacement key

Lost your wheel lock key?

Every McGard set comes with an I.D. registration card or sticker. It shows the part number, style and pattern code of your set. That number is your lifeline. You need it to buy an extra key or lock, and for security reasons replacement keys are sold only by the manufacturer.

Do this now, before you need it:

• Put the label with the replacement key code in your glovebox.
• Register the code with McGard, online or by mailing in the form. It's free, and if you lose the card later, they still have your code on file.
• Get a spare key, and keep the key tool somewhere secure inside the car. McGard sells a nylon storage pouch that holds up to 2 keys.

Replacement keys and locks are ordered through McGard's customer service site. From outside the United States, call McGard customer service at 716-662-8980, Monday to Friday, 8:00am to 5:00pm Eastern.

Mistakes we see all the time

• Zapping the lock on with an impact gun. It over-tightens the lock, which makes it hard to remove and can permanently damage both the lock and the key. Uneven or excessive torque can also hurt wheel seats and distort brake rotors.
• Four locks on one wheel. One per wheel. More is just more keys to lose.
• Lubing up the studs. Clean them, don't lube them.
• Reusing old locks on new wheels without checking the seat. A cone-seat lock on a wheel built for a different seat is asking for trouble.
• Tossing the little nylon plugs. On open-end lug nuts, skipping them can lead to thread corrosion, and that isn't covered under warranty.
• Losing the registration card. Without the code, getting a new key gets a lot harder.
• Skipping the 25-mile re-torque. It's a quick check. Do it.

Buying new wheels? Sort the locks at the same time

A fresh set of wheels is the right moment to buy matching locks. Seat style and thread depend on both the wheel and the car, so match your locks to what the wheel maker recommends. That's the one detail worth confirming with the maker for your exact setup.

Before you even get to hardware, make sure the wheel fits. Our wheel fitment calculator and offset and backspacing calculator will tell you where a new wheel sits compared with your current one. If ET numbers still look like alphabet soup, read why offset matters more than width and our guide to wheel sizing.

Here are three wheels we'd happily lock down.

The Niche M224 Gamma is a cast monoblock in 19x8.5 +35 on a 5x120 pattern, with a concave split five-spoke face in gloss black. It weighs 32 lb, carries an 1,800 lb (816 kg) load rating and has 6.1 inches of backspacing. Niche backs it with a lifetime structural warranty and a one-year finish warranty. That's a wheel worth protecting.

The Enkei Raijin is a flowform monoblock in 18x8 +45 on 5x112, finished in hyper silver. It has a 72.6 mm hub bore and 6.3 inches of backspacing. It's a clean street and performance wheel, and the kind of thing that walks off a car parked on the street overnight.

The Heritage Wheel Kokoro MonoC is a cast monoblock in 18x8.5 +35, 5x120, in silver, with that heart-shaped spoke design people either love or stare at. Heritage also offers custom bolt patterns and custom finishes, so no two sets have to look alike. Unique wheels are exactly why you run locks.

Wheel	Size	Bolt pattern	Offset	Construction	Price
Niche M224 Gamma	19x8.5	5x120	+35	Cast monoblock	$420.00
Enkei Raijin	18x8	5x112	+45	Flowform monoblock	$370.00
Heritage Kokoro MonoC	18x8.5	5x120	+35	Cast monoblock	$339.00

Shopping for a specific car? Our fitment guides for the 8th gen Civic, Golf R, Lexus IS350 and Infiniti G35 walk through sizes, offsets and real builds.

What we'd do

• On any car with aftermarket wheels, we'd run one lock per wheel, matched to the seat style the wheel maker recommends.
• Lug wrench or torque wrench only. Lock goes on last, comes off first, and gets re-torqued at 25 miles.
• Register the key code the day you install, put the label in the glovebox, and keep a spare key.
• Keep the key tool in a secure spot inside the car, not on the garage shelf. Locks buy you time; parking smart does the rest.

FAQ

What is a wheel lock?

A wheel lock is a lug nut or bolt with a patterned head instead of a hex, so it needs a matching key tool to install and remove. You replace one regular lug on each wheel with a lock. Without the key, a thief can't spin that lug off with a normal socket, which makes the wheel a lot harder to steal.

Are lug nut locks worth it?

On aftermarket wheels, yes. They're very hard to remove without the key, and most thieves want a quick, quiet job, so they move on to an easier car. They aren't guaranteed theft proof, and someone determined will still try, but for what a set costs next to a set of wheels, we'd run them every time.

What do I do if I lose my wheel lock key?

Find the I.D. registration card or sticker that came with your locks. It has the part number, style and pattern code. You need that number to order a replacement, and replacement keys come only from the manufacturer. If you registered the code with McGard, they have it on file even if the card is gone.

Where should I keep my wheel lock key?

In a secure spot inside the car, so it's there when you get a flat. Put the label with the replacement key code in the glovebox, and keep a spare key too. McGard sells a nylon pouch that holds up to two keys, which stops the key from rattling around and getting lost under a seat.

How many lug nut locks do I need per wheel?

One. McGard recommends a single lock per wheel, so a typical car takes a set of four. Install it as the last fastener on each wheel and loosen it first when the wheel comes off. Tighten it with the key and a lug wrench or torque wrench, never an impact gun, and re-torque after 25 miles.

Ready to lock down your wheels? Grab a set from our lug nut locks and match them to your wheel's seat style.