Hubcap & Nut Cover Guide


Finding the correct hubcap, axle cover and lug nut covers for your semi truck can be difficult, but it doesn’t have to be. Here are our tips for measuring the wheel to determine what you need before you buy.

When finding a hubcap for the front (steer) axle, first count the number of notches.  Notches are sometimes also referred to as pilots. We offer many universal fit front hubcaps that fit wheels with 4, 5, and 6 uneven notches. There is usually no need to measure the diameter of the opening, all semi trucks have a standard 8-23/32″ diameter center hole.

Next measure the lip height. Most aluminum wheels have a 1″ lip and most steel wheels have a 7/16″ lip, however it is always best to measure to be 100% certain before buying. We also offer a universal fit front hubcap that will fit both sizes.

Choosing a hubcap for the rear (drive) axle requires a bit more measuring to be sure you get the perfect fit. First, measure the diameter of the axle.

Next, measure the stud size. Common sizes and quantities are 8 of 5/8″, 8 of 3/4″, and 12 of 1/2″ studs. A Dana Spicer hub has eight 5/8″ studs. A Rockwell hub has eight 3/4″ studs, some may also have one flat bolt instead of a stud. If the wheel has eight 5/8″ studs it usually uses an 8″ hubcap. If the wheel has eight 3/4″ studs it usually uses an 8-1/4″ hubcap. If the wheel has twelve 1/2″ studs it usually uses a 7-1/2″ hubcap.

One more thing to consider is the stud length. If the wheel has extra long studs you will probably need a hubcap with a 1-1/2″ lip.

We also want to bring something up that can cause confusion. Be careful not to confuse hub caps with wheel covers. It is very common to confuse the two. Hub caps cover just the lug nuts, but a wheel cover covers the whole wheel and therefore is much bigger. So, the measurements we advise here will suit you fine if you are buying hubcaps for sale but will not work if what you really want is a wheel cover. Also, you don’t want to buy a Universal Stainless Steel Baby Moon Front Hubcap when what you really wanted was a wheel cover because the look is much different.

Now let’s find lug nut covers to complete the look. First, determine the size of the lug nut by using a socket that fits snugly. The size marked on the socket is the size of lug nut cover you will order. Some lug nuts have a flange or washer where it meets the wheel, others do not. Be sure to read the product description while shopping online, we offer covers for lug nuts with and without a flange. 33mm lug nuts usually have a flange and are commonly found on trucks 2006 and newer. 1-1/2″ lug nuts are often found on trucks older than 2004. If you do not have a metric socket set, you can make a educated guess as to your socket size using standard measurements. 33mm is smaller than 1-1/2″, it converts to 1.29″.

We offer both push on and thread on lug nut covers. Thread on nut covers require at least a 1/2″ of stud thread to secure properly. Use push on nut covers if the wheel has less than 1/2″ of stud thread protruding beyond the nut.

If you are going to increase the visual appeal of your truck with new hub caps and lug nuts, why not check out some other semi truck parts. We offer many parts that will coordinate to create an overall look to your truck. You can combine then to create your unique style so when people see your truck coming down the road, they know it is you. Taking pride in your truck is something that all drivers can relate to, so why not buy high quality products so you can stand out. More options include axle covers (also called top hats), oil cap covers, aero coverswheel simulators, and wheel covers. Here at Iowa 80, we have an extensive variety to choose from, so let’s start shopping!

Finally, we want to share a tip with you to get the most out your new lug nut covers. The main reason to buy lug nut covers is to make your truck look good. So, obviously, you want to invest in the best nut covers for truck, but all that can be ruined if you aren’t careful when putting them on. One slip and you could ruin a new cover. Make sure you also consider nut cover tools. Using the right tool will help ensure you get them on securely and without damage. Make sure to carry any special tools with you in case you need to change a tire or get service done to your wheels.

10 thoughts on “Hubcap & Nut Cover Guide

  1. This is for my 1996 w900L already purchased the metal front and rear caps the front caps and nut covers fit the rear is also plastic nut covers with metal centers the front all fit on OK , the rear bolt covers fit but the center did not .I’m trying to get the rear full hub cover from nut to end of hub with top that screws on or off .I would prefer it to be metal but I will settle for plastic I have 2 in my box that I’m considering purchasing besides the one purchased on my last order which the centers don’t fit on the rear hub. That order came with several other things. Please if you can help me get the best order together to purchase.
    Happy Columbus day,

    Christian Santiago

  2. I own a 2015 usxpress Freightliner cascadia evolution can anyone help me with the correct sizes and best look thanks

  3. Im looking for rear hub covers for a R model Mack with 58,000 lb rears. the cap diameter is 10 inches with a 6 inch cone any help would be appreciated, thanks, Jon

    1. Hi Jon, Sorry for the delay in response. Were you able to find what you needed on our website? If not, please give us a call at 866-446-9280 and we can do more research. Thank you!

  4. I would like to order these for my 2015 dodge 5500 19.5 do you have something available on Black I like the big semi spikes!

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