Getting Lugged Down

Close-up photograph perspective of a man in sunglasses and a hat holding a big blue/grey power tool drill locking a solid lug-nut cap of/into a trailer wheel

Chrome-plated lug-nut caps enhance the appearance of trailer wheels — but over time they can distort and get stuck in a socket needed for removal and torquing. Replacing them with higher quality, solid lug nuts ends the struggle.

By Bob Livingston / Photos by author

retty wheels add a lot of pizzaz to any travel trailer or fifth wheel, and chrome lug nuts add to the finished look. In many cases, the lug nuts are capped with a thin metal chrome-plated sheath to improve aesthetics — after all, no one wants to look at ugly studs protruding through standard lug nuts. In typical lets-save-some-money fashion, however, capped lug nuts are cheaper to manufacture and are provided with many of the trailer wheels rolling down the highway.

But trouble can be lurking — and not rear its ugly head until you have to change a wheel/tire on the road.

The problem? Over time, these capped lug nuts can build corrosion, swell, deform and crack, which makes them prone to failure — or, at least, create problems when they need to be removed or tightened. I make it a habit to torque lug nuts to specifications before and during all trips and, unfortunately, the tires on my fifth wheel have been replaced way too often (due to failures) so the lug nuts have been “harassed” more than normal. Recently, I noticed the lug nuts were “sticking” while torquing to specifications and some of the lug nuts were getting jammed into the socket because of the deformed chrome caps — and getting them dislodged was frustrating and time consuming. During a recent trip, in fact, one of the original lug nuts became so deformed a cheap (sacrificial) socket had to be forced on with a hammer to provide enough grip. Not only is this inconvenient, but you also have to be careful not to pop out the stud if the lug nut is not fully seated while hitting it with a hammer.

Obviously, this is a less-than-adequate solution only initiated out of necessity. After a few more episodes of wrestling with the lug nuts, I realized it was past time for replacements.

Surprisingly, it was more difficult finding lug nuts in a tire store than one would expect. After visiting three tire and four auto parts stores and coming up empty-handed for my required 24-lug-nut requisition, I checked out availability online and found just what I wanted at Summit Racing (summitracing.com), a well-respected speed shop among car aficionados. I was hell-bent on finding quality, solid Acorn lug nuts (no chrome caps) and Summit Racing offers a good selection of quality products, rather than settling only on the cheaper counterparts which are prevalent online. I bought 24, ½ -20 lug nuts for $51, which were much nicer than the original capped counterparts. It’s possible to purchase higher-grade lug nuts from Summit Racing at twice the cost, but I figured that wasn’t necessary considering the ones I bought looked pretty darn decent — and light years better than the originals. Time will tell if that was a good decision.

The lug nuts were replaced one at a time using an impact gun, which made easy work of removal. Each new lug nut was first threaded on by hand to make sure there was no cross-threading; if the lug nuts are not on right, the powerful impact gun can damage the studs and create even more problems. After setting the impact gun to the lowest torque value and to only “hand tighten,” (not all impact guns will have this provision) each new lug nut was seated individually. When all six lug nuts were tight, they were tightened to 100 ft.-lb. with a professional grade torque wrench (although many less-expensive torque wrenches will suffice).

New lug nuts require several torquing sessions to make sure they are fully seated in the wheels. Check torque after 50 miles, then again at 100 miles and then at 200 miles. After that, it’s just a matter of torquing the lug nuts before heading out on the road and preferably before leaving an RV park. It only takes a few minutes to do this.

Granted, I am a fanatic when it comes to lug nuts, but after a friend lost a wheel from his fifth wheel at 60 mph on the highway, I figure the extra effort to keep a wheel from becoming a deadly projectile on the highway is worth it.

Close-up photograph perspective of a black metal original lug nut rod lied down on a grey mat next to a blue colored power drill tool

Close-up photograph perspective of a man's hand with a hammer putting it close to the half black metal original lug nut rod's socket area

Over time, the original lug nuts became deformed and jammed in the socket during removal. A few of the lug nuts were so deformed that the socket could not slide on properly, which just exacerbated the problem. It took a screwdriver or ¼-inch socket extension to pop out the stuck lug nut.

Close-up photograph of a man's hand holding a small new lug nuts packet item from Summit Racing

After chasing around town for new lug nuts, 24, ½-20 acorn-style lug nuts were purchased at Summit Racing in Reno, Nevada. Summit has a vast inventory of parts earmarked at car and hot rod buffs, so it had a good inventory. Lug nuts can also be procured online from various sources.

Close-up photograph of a man's hand threading a new lug nut on to the stud, using a socket and extension, to prevent cross threading on a trailer wheel

Close-up photograph of a man's hand using the blue/grey power drill too on the trailer wheel after threading a new lug nut on to the stud, using a socket and extension, to prevent cross threading

Each new lug nut was first threaded on to the stud by hand, using a socket and extension, to prevent cross threading. It’s hard to get a good feel when using an impact gun and allowing it to drive a cross-threaded lug nut will damage the threads. Therefore, it’s always good practice to start any lug nut by hand. Once the lug nut was threaded on to the stud, the impact gun was set at a low torque value and tightened.

Close-up photograph perspective of the final tightening of the lug nut through a good torque chrome wrench on a trailer wheel

Final tightening of the lug nuts should always be done with a good torque wrench. Check with the manufacturer of the RV for proper torque value; these lug nuts were torqued to 100 ft.-lb., a value provided on a sticker placed on the kingpin box.

Close-up photograph of man's hand holding the original lug nut (right) was deformed and difficult to fit into a socket; The original lug nuts had chrome-plated caps, which deformed easily; in some cases, these caps can become corroded, cracked or even swell in size. Solid lug nuts like the ones from Summit Racing (left) are a much better choice.

As you can see, the original lug nut (right) was deformed and difficult to fit into a socket. The original lug nuts had chrome-plated caps, which deformed easily; in some cases, these caps can become corroded, cracked or even swell in size. Solid lug nuts like the ones from Summit Racing (left) are a much better choice.

Close-up photograph perspective of the new lug nut (top left) is similar in style but a bit smaller than the original capped version (top right) of the trailer wheel; New lug nuts should be re-torqued after 50 miles, then again at 100 and 200 miles to assure proper seating.

The new lug nut (top left) is similar in style but a bit smaller than the original capped version (top right). New lug nuts should be re-torqued after 50 miles, then again at 100 and 200 miles to assure proper seating.

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