Round Tube Mounts

These are all measured by the outer diameter (OD) of your mounting bar, or in simpler terms, the cross-section of the tube. We make the following sizes: 1.125", 1.25", 1.5", 1.75", 2"

The easiest way to measure these is with a set of calipers like these ones that can be had for 1.99 here: Harbor Freight Calipers

Another great way measure it is take a piece of string and wrap it around your bar, marking where the string meets itself. After pulling this off the bar, you can measure the length of the string with a ruler and this will give you an approximate circumference which you can use to infer the diameter. Typically your string will stretch as you pull it tight so your measurements will be slightly longer, by rounding down you can find what you need. You can see in the photo that my string measured right at 5 inches, so by referencing the table below (and rounding down to account for string stretching) I can see I have 1.5" OD tube cross bars.

  1. Here's an easy guide for diameter to circumference (length of string):

1.125" = 3.53"

1.25" = 3.9"

1.5" = 4.7"

1.75" = 5.5"

2" = 6.3"

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Square Bar Sizes

These mounts are simpler than the round tube mounts, they are all listed for exactly the size load bar they are designed for. Sizes are listed in Width X Height. For example, the 2"x1" mount is for a crossbar that is 2 inches wide, and 1 inch tall.

Thule Square: This mount is for a bar approximately 1.25" wide and 0.92" tall. This mount will also work great for racks made out of 1"x1" square tube, although there will be an 1/8" gap on either side which will not affect the mounts function.

1.5"x1.5": This is for a common standard size of 80/20 aluminum extrusion (pictured on the right). It will work great for all applications that use a 1.5" wide and 1.5" tall cross bar.

2"x1" (Prinsu): This is for the very common standard size of 80/20 aluminum extrusion (pictured on the right). It will work great for all applications that use a 2" wide and 1" tall cross bar.

2"x2" (ACS): This is the same as the 2"x1" except that it has additional height to protect the bolt shank when used on any 2"x2" square mount. This mount is also designed to fit the standard ACS Leitner rack load bars.

3"x1.5": This is another form of 80/20 extrusion that has gained popularity recently. This will work with any load bar that has a 3" width and 1.5" height

3.2"x1.125" (CBI): This will work with any load bar that has a 3.2" width and 1.125" height. This mount is also designed to fit certain generations of the CBI bed rack. There are multiple generations and different tolerances so you should always double check your bar measurements before ordering.

3.2"x1.5" (RCI): This will work with any load bar that has a 3.2" width and 1.5" height. This mount is also designed to fit certain generations of the RCI bed rack. There are multiple generations and different tolerances so you should always double check your bar measurements before ordering.

Rhino Rack HD Bar: This bar is also square shape but with very specific measurements. The mounts measure 1.62" wide and 1.62" tall. You can find a link to the bars here to reference: Rhino Rack HD

Everything else...

These are all designed to fit 1 specific brands crossbar. There is some cross-compatibility from brand to brand.

Front Runner: While these are technically rectangular bars they are very specific. These are for load bars that measure 3.55" wide and 0.92" tall. These are most commonly found on Front Runner roof racks however I have seen them on other brand bed racks as well. Here's a link to this bar: FR Load Bars

Yakima HD Bar: This is found as a crossbars for many bed racks. It is 2.87" wide and 1.5" tall. This bar has rounded/sloped edges so this is not compatible with any rectangular bar that shares similar measurements. Here's a link to this bar: Yakima HD Bar

Thule AeroBar/Wingbar Evo, Yakima Jetstream: This is the most common bar style in this category, it also fits Malone Airflow2 load bars however it will have a slight gap at the bottom that doesn't affect its function. These bars are asymmetrical and measure 3.15" wide and 1.24" tall at its highest point. This is a link to the bar it is primarily designed for: Thule Aero Blade

Rhino Rack Vortex: This bar is very similar to the one directly above it but has a more symmetrical shape. It is 3.2" wide and about 1.2" tall at its tallest point. You can find a link to it here to reference: Vortex Bar

Venture Tec Rack: This bar is 3" wide and about 2.5" tall at its tallest point and it has a trapezoidal shape on the bottom. Here is a link to this bar for reference: Venture Tec Rack

What is the proprietary security nut?

We have licensed our own security nut system that is keyed specifically to us. No other company on the planet has this same security nut key and it only fits in 1 specific orientation. This is exponentially safer than standard security hardware. The other option is our Tri-Groove security nuts. During our testing we found that some brands tri-slot nuts can be taken off with many different sockets however ours has a unique angle to the nut which helps prevent multi-socket use. The proprietary nut key requires about 2.5" of room to get onto the bolt, it will also bottom out on bolts that are too long so if you have to re-use your stock hardware it is best to err on the side of caution and order the tri-slot security nuts instead.

When will _____ mount be back in stock?

While we try our hardest to maintain accurate stock levels, these unprecedented times have stressed our logistics to their breaking point. That being said, because our mounts are all made locally and out of USA sourced materials, we are faring better than most! Typically mounts will not be out of stock for longer than 3 weeks time at most, and most in stock ship within 48 hours, so check back soon!

I have _____ bars, which mount will fit?

Refer to the sizing guide above! If that doesn't fully answer your questions you can e-mail us directly at and we will help you out. Please include measurements of your current bars and a photo, otherwise we can't help, calipers are best for measurements, you can pick one up for 2 bucks here: Harbor Freight Calipers

My tent uses a different rail attachment system or different size bolt, how do I use the mounts with it?

99% of tents use an aluminum slider designed for a 13mm hex head on a 8x1.25mm bolt. Some of the recent tents out of Korea and a few of the Alu-Cab models use a metal plate that has square holes for a carriage bolt. For this style you need to cut the plate in half so each side can move independently and re-use the stock carriage bolts and it will bolt right up, however you will want to select the tri-slot hardware because the proprietary hardware only works with specific length bolts. Here's an example of that sort of tent mount: Carriage bolt style tent mount I believe these styles are being discontinued soon because of the amount of folks who end up having to do that. There is another design that has a giant square head on top of the bolt, if these bolts thread onto the security nuts you can simply re-use them and discard the included hardware. Our mounts are not compatible with any tent rail design that uses 10mm bolts instead of the standard 8mm, or tents with rails that are not parallel to each other.

Can I order 6 total mounts or extra hardware?

We can accommodate any custom order amounts. That being said, 8 class 10.9 bolts are rated for approximately 1,000X the weight of your tent. The main reason to run 6 mounts is if your load bars are not connected to each other. With todays modern plastic/thin sheet metal beds, having load bars that are not physically connected to each other can be a detriment to the life of your tent. As the frame of the vehicle flexes and in turn your bed flexes, that vibration and movement will be transferred into your tent if the load bars are not connected to each other. In that situation having 6 mounts makes sense to help reduce a bit of the movement. You can order the normal 4 pack and put in the order notes that you want to be billed for an additional 2 mounts and we will send you a PayPal invoice for the difference.

How do I return or exchange my mounts?

Returns and exchanges are super easy. We send you a return label, you slap it on the small flat rate box the mounts come in, wrap up the un-used mounts and place them in the box with the hardware and security nuts/socket and send it back. It's that simple! If you need a different size I will happily switch them out for you. A 10% restocking fee will apply to returns so please make sure you check the fitment guide before ordering.

How many mounts are included in the kit?

4 total mounts come in the kit, for a detailed list check the "included" section of the product page.

Will you make mounts for _____ crossbar?

We are expanding our line-up all the time! If you have a load bar you think we should make a mount for let us know, but keep in mind it has to be popular enough to be worth the investment. We do not make custom one-off mounts because they would cost you more than your tent is worth as you would be taking the whole cost of R&D and prototyping the mount on just 1 person, instead of spreading it out over hundreds of orders.

How often should I check my hardware and should I locktite them?

It seems counter intuitive but locktite will actually make your tent loosen up. What happens is; in the first 500 miles (or first offroad trip) after initially installing your mounts and torqueing them to your rooftop tent manufacturers recommendation, the soft aluminum of your tent's rails will "settle" into place. Because of this you will go to check the mounts and they will be slightly loose, this is completely normal and expected... the security nuts/washers themselves have not spun loose, but the space between your tent and the load bars has gotten physically smaller. Because of this, if you apply locktite to the nuts they will give you a false sense of tightness when you check them and eventually your tent could settle to the point that it can rattle/vibrate around. You should check your tent hardware as often as you inspect and check the rest of your vehicle (at least every oil change). Our personal set of mounts were on our truck for over 3 years through about a dozen trips on the Rubicon trail, wheeling during King of the Hammers, hitting whoops at freeway speeds for shock tuning and jumping our truck, with no loose fasteners after the initial torque checks were done correctly.

Do you offer installs/local pickup?

We no longer offer installs or local pickup since we have been fortunate enough to be able to move our shop onto our own property. Unfortunately this means our insurance will not cover customers at our residential address. All mounts usually ship out twice a week in flat rate boxes which ship very quickly. My goal is to always get them out in time to be installed before the next weekend's adventures, however we are not Amazon and both of us have day jobs.

My tent got stolen.

I hate thieves! I can't imagine thinking it's okay to take someone else's property. With the state of the world, tent theft is getting extremely common. While nothing in this world is truly "theft-proof", you're doing yourself a favor by making yourself a hardened target so they move onto an easy mark. I have seen at least 50 tents stolen this past year alone. Any tourist area or seemingly safe parts of towns are easy targets for guys with bolt cutters and a pickup truck, as seen in my videos. If you have had your tent stolen please e-mail me a copy of the police report with your personal information blacked out and I will send you a set of security mounts free of charge for your replacement tent to give you some peace of mind. I also encourage everyone to get renters insurance which can sometimes cover tent theft.


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