Round Tube Mounts

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

The easiest way to measure these is with a set of calipers.

Not everyone has a set of calipers so another great way to do 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"

1.5" = 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.

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

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


When will "X" Bar 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, so check back soon!

I have ________ bars, which mount will work for me?

Refer to the sizing guide above! If that doesn't fully answer your questions you can e-mail me directly at and I will help you out. Please include measurements of your current bars and a photo, otherwise I can't help, thanks!

My Tent uses a different rail attachment system than standard and i can't figure out how to bolt the mounts on.

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. 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. Of all the mounts we have sold I have seen 1 tent so far that uses 10mm bolts, our mounts are not compatible with any tent rail design that uses 10mm bolts instead of the standard 8mm. Our mounts are also not compatible with tent rails that are not parallel to each other.

Can i order 6 mounts/extra hardware?

We can accommodate any custom order amounts. That being said, the 8 class 10.9 bolts holding your tent on with our mounts 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 alot of sense to help reduce a bit of the movement. Please e-mail me with any special requests and I will get them taken care of for you.

I ordered the wrong size, how do i return it or exchange it?

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 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 the return so please make sure you check the fitment guide before ordering. Shoot me an email at and i will get it taken care of.

What all is included in the kit?

Everything in the "Included" section of the product page is included in the kit.

Can i get a discount?

While we do run sales around the holidays which always involve a donation to a worthy cause of some kind, we do not have any active discount codes just floating around. Our products are fairly priced, they are made by hard-working Americans who are paid a living wage and we only use USA sourced materials. We do not support child-slave labor or sweat shops in any capacity. Frankly, i don't expect a discount when I'm at the grocery store buying from a giant corporation, so I would never ask for a discount from a small business.

Are you going to make mounts for "X" 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 RnD and prototyping the mount on just 1 person, instead of spreading it out over hundreds of orders.

How often do i need to check my hardware/why don't the kits include locktite anymore?

It seems counter intuitive but locktite will actually make your tent loosen up. What happens is you initially install your mounts and torque them to your rooftop tent manufacturers recommendation. Over the course of 500 miles or after your first off-road trip, the soft aluminum of your tents 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 2 years through about a dozen trips on the Rubicon trail, doing all the trails during King of the Hammers, pre-running and jumping our truck, with no loose fasteners after the initial torque checks were done correctly. If I can spend years jumping our truck, hitting whoops at freeway speeds, and doing the hardest rock crawling trails on the west coast, with zero loose hardware... you can too!

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 weekends adventures, however we are not amazon. We do offer emergency welding services for the surrounding areas and custom fabrication and plasma cutting services.

My tent got stolen!

We hate to see it! The fact that some people are so broken inside that they can just take someone elses property and still be able to sleep at night doesn't sit well with me. With the state of the world, tent theft is getting more and more common. While nothing in this world is truly "theft-proof", you're doing yourself a favor by making your stuff annoying enough to steal that they move on to an easy mark. There is one small town in Colorado where folks have had 3 tents stolen in the past 6 months alone. Locally we've had 2 hit in San Diego and 1 boosted in Orange County recently. If you have had your tent stolen please e-mail me and I will send you a set of security mounts free of charge for your replacement tent to give you some peace of mind.



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