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  1. Tow Bar
  2. Roadmaster
  3. Fits Roadmaster Base Plates - Crossbar
  4. 6000 lbs
  5. Telescoping
  6. Coupler Style
Roadmaster StowMaster Tow Bar - 3" Lunette Ring - Car Mount - 6,000 lbs

Roadmaster StowMaster Tow Bar - 3" Lunette Ring - Car Mount - 6,000 lbs

Item # RM-583
Our Price: $875.00
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Ideal for off-roading, this lunette ring tow bar pairs with your pintle hitch to give your towed car maximum versatility over rough terrain. Mounts to base plate with quick-disconnects and stores on the front of your car while you drive around town. Great Prices for the best tow bar from Roadmaster. Roadmaster StowMaster Tow Bar - 3" Lunette Ring - Car Mount - 6,000 lbs part number RM-583 can be ordered online at or call 1-800-940-8924 for expert service.
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Roadmaster Tow Bar - RM-583

  • Fits Roadmaster Base Plates - Crossbar
  • 6000 lbs
  • Roadmaster
  • Telescoping
  • Coupler Style
  • Stores on Car
  • Standard
  • Steel

Ideal for off-roading, this lunette ring tow bar pairs with your pintle hitch to give your towed car maximum versatility over rough terrain. Mounts to base plate with quick-disconnects and stores on the front of your car while you drive around town.


  • Safely take your vehicle off-road and over rough terrain using your pintle hitch
    • Lunette ring/pintle hitch combo gives your towed vehicle a wider range of movement
  • Easy hookup with arms that smoothly extend and pivot to reach the pintle hitch
    • Stainless steel construction of inner arms lets them slide in and out
  • Autowlok mechanism automatically locks the arms into towing position
    • Once at your destination, press the Autowlok button to unlock and disconnect
    • Release tool (RM-066 - sold separately) helps you get out of a bind
  • Quick-disconnect system lets you quickly and easily mount the tow bar on your towed car
    • Brackets on tow bar match up with brackets on base plates
  • Engineered to be super tough
    • FEA testing guarantees a strong finished product
    • Self-lubricated nylon bushings eliminate friction between the inner and outer arms for a longer-lasting, better-functioning system
    • Welded steel plugs seal the ends of the tow bar to guard internal components
    • High-tech powder coat finish protects against rust
    • Full-length crossbar with angle iron brace provides maximum strength and support
  • Secure storage on the front of your car
    • Stays mounted on the base plate as you drive around
  • Made in the USA


  • Fits: most Roadmaster Crossbar-Style base plates
    • Will not work with Direct-Connect base plates
    • Can be used with Demco Classic base plates with adapter (DM9523062 - sold separately)
  • Application: pintle hitches
  • Lunette ring dimensions: 3" inner diameter
  • Arm length (as measured from center of lunette ring to center of quick-disconnect bar):
    • Extended: 40"
    • Retracted: 33"
  • Weight capacity: 6,000 lbs
  • Weight: 38 lbs
  • Limited lifetime warranty

Ideal for Off-Roading and Rough Terrain

If you plan to be going off-road or over rough terrain, the lunette/pintle combination is an ideal setup because of the versatility that it offers you. Your toad (towed vehicle) will have a greater range of movement both horizontally and vertically; the ring is able to tilt up and down and twist left and right much more than the standard coupler and ball mount. This ensures that it can bounce and turn over uneven surfaces without damage to itself or the tow bar.

Smooth Hookup with Stainless Steel Arms

The StowMaster is designed to make hooking up your toad a smooth and easy process. The telescoping arms are able to extend to the needed length and angle to reach your RV's pintle hitch without the need for your vehicle to be perfectly level or in the exact right spot. The inner arms are stainless steel and will slide in and out smoothly. Supremely corrosion resistant, they'll stay rust-free and functional for the life of the tow bar.

What is Autowlok?

Once you're all hooked up, slowly pull forward and the mechanism in the arms will automatically lock into towing position when the arms are fully extended (hence the name Autowlok!). Double check that the arms are properly latched and you'll be ready to hit the road!

Auto lock

Then, when you've reached your destination and you're ready to unhook your vehicle, press the Autowlok release button on the arm of the StowMaster to disengage the internal spring-loaded pin. The arms will be able to telescope again, making it easier to disconnect.

However, if you're on uneven terrain, or if your towed vehicle is not perfectly lined up behind your RV, chances are you'll experience some binding. This is the result of tension that can build up in the telescoping arm, and it can make it difficult to disconnect your vehicle. If this happens, a release tool (RM-066 - sold separately) will give you the leverage you need to force the button down.

Simple Storage: Car-Mounted Tow Bar with Quick-Disconnect


The StowMaster comes with quick-disconnect brackets to make it easy to mount your tow bar to the front of your toad. This crossbar creates a triangular frame so you can maneuver the tow bar as one piece, instead of working with each arm at a time. It also gives you the option to add on other Roadmaster accessories, such as the Guardian Rock Guard or Tow Defender.


When you're not towing, the Roadmaster StowMaster stays mounted on the front of your car. To store the tow bar, you'll slide the driver's-side arm all the way over to the passenger side and fold the arms down together parallel with the quick-disconnect crossbar. Pin the arms in place and you'll be set to drive around on your adventure; just be careful pulling into a parking spot as you'll need several inches of extra clearance.

Of course, you can also remove your tow bar and stow it away when you're not flat towing. The StowMaster folds into a neat, convenient bundle, and the quick-disconnects will make it pretty easy to pop on and off.

For added protection from the elements, slip the Roadmaster tow bar cover (RM-052-3 - sold separately) over the tow bar when you're not using it.

Engineered for Excellence

FEA test

The StowMaster is engineered to be as tough and durable as possible. Throughout the design process, rigorous physical and computerized testing is done, including Finite Elemental Analysis (FEA). Each of these tests display a 3-dimensional image of the tow bar while it is put under thousands of pounds of pressure. Areas of stress in the tow bar can then be located and strengthened. This process is repeated until any weak spots, particularly those found in load-bearing components, are completely removed. The result is a product that is durable, strong, and safe.

The internal self-lubricating nylon bushings also help to absorb road shock and reduce wear and tear on the tow bar by eliminating friction between the inner and outer arms as they telescope in and out. Inside each arm, a built-in safety strap provides extra peace of mind by ensuring that the inner and outer arms won't separate in the event of a latch failure.

What You Need to Flat Tow

Flat towing can be a much more convenient way to take your car RVing with you than using a trailer or a tow dolly. It'll save you storage space both at home and at the campsite, and it takes less time and hassle to hook up.

To flat tow your vehicle, there are 5 basic components you're going to need: a tow bar, a base plate kit, a safety cable set, tow bar wiring, and a flat tow braking system.

For the RV Between the RV and Towed Car For the Towed Car
Hitch Tow bar Base plate
Wiring plug Safety cables Braking system
Wiring adapter cord Wiring kit/diodes

The custom-fit base plate installs on the frame of your toad so you can connect the car to your RV with a tow bar. Hook up safety cables between the vehicles to ensure that the toad does not separate from the motorhome if the tow bar becomes detached. Tow bar wiring syncs your vehicle's signal lights with your motorhome's tail lights, as required by law in most states. Finally, the flat tow braking system - also required in most states - activates the brakes in the toad when you hit the brakes in the RV, making for smoother, safer braking, and preventing wear on your motorhome.

583 Road Master Stow Master Pintle-Style Towbar with 3" Lunette Eye - Vehicle Mount - 6K Rating

Installation Details RM-583 Installation instructions

Video of Roadmaster StowMaster Tow Bar - 3" Lunette Ring - Car Mount - 6,000 lbs

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Roadmaster StowMaster Tow Bar Review

Hi there flat towers. Today we're going to be taking a look at Roadmasters Stowmaster 5000 Tow Bar. This is a Lunette Ring Tow Bar that's available in either a 2-1/2 inch Lunette Ring or a three inch Lunette Ring. There's five main components you'll need when flat towing your vehicle with whatever you want to pull it with, whether it be a motor home or a tractor trailer. You'll need your tow bar, which is the connection between your vehicle and whatever you're towing. You'll need your safety cables, which is a supplemental connection in addition to your tow bar.

You'll need your diode wiring, which takes all the lighting signals from the towing vehicle and sends them to the towed vehicle. And you'll also need your supplemental braking system, which will apply the brakes on your towed vehicle whenever you hit the brakes inside your towing vehicle. And of course, you'll need a base plate for your towed vehicle, which is going to provide the connection point for your tow bar to attach to.Now your traditional tow bars are just going to fit right into the receiver on the hitch on the back of your vehicle. But with this style, having a Lunette Ring, you'll need a pintel hitch to attach it to. This is nice because many of your tow bars that just go in here, they don't provide any adjustment up or down, and they can be fairly costly to get an adapter, a high-low adapter.

Most of your high-low adapters are only going to provide a set position, which really is not a huge deal because once you know what your position is going to be, you've got it.But if you ever change motor homes or vehicles down the road, you then need to readjust for that setup. With a pintel hitch, you can get an adjustable pintel hitch and be able to make those adjustments on the fly. That's particularly useful for our customer here, because he delivers vehicles and the Jeep here that we've got hooked up to our tow bar is what he pulls along with them. It's his personal vehicle. So he delivers the vehicle, pull in his Jeep, and then when he goes to deliver the next one, he can easily move these things over to move the next vehicle while bringing his Jeep along the whole time.If you need a pintel hitch, you can get one at here.

We're using BMW's Tow and Stow, which has a maximum towing capacity of 16,000 pounds, so it should be more than enough than just about anything you plan on doing with it.So what's really nice about having a Lunette Ring tow bar is that you can just take your pintel hitch, go on to the next vehicle and you can hook right up and get to your next destination. And I also like that this tow bar is designed to stay with the vehicle rather than your motor home, like your traditional tow bars. Since with this particular setup, you're mostly going to be moving, it's nice to be able to just pack everything up here and hit the road or hook back up to whatever you need to. With those other styles, the storage positions are designed to be on that side, so you have to disconnect it and put it in the back of your vehicle and move it around. And tow bars are pretty heavy.

It's pretty nice to be able to just fold this up and click it in place and move on.This tow bar is rated for 6,000 pounds, so it's going to be more than enough for the Jeep that we're pulling here, but it'll also be fine for most of your smaller trucks, your mid-size SUVs, and just about all of your cars out there. The only one that it might some problems with is your larger trucks.This tow bard's also going to be great for off-roading. The Lunette Ring will give us plenty of movement here, so we don't have to worry about getting into a strange position where our ball and coupler might bind up. And there's a lot of off-road equipment that used pintel hitch hookups already. I know around the farm, we've got plenty of this stuff here. So if we we're just wanting to move it around, this is a quick, easy way to hook it up and just move it around.And when you go to takeoff, the tow bar is going to be self-aligning. You'll notice here that the arms are going to extend out and the vehicle is going to track and lock-in right behind us.Now one of the things you want to keep in mind is that this is a binding tow bar. And what that means is that if our towing vehicle and our towed vehicle aren't sitting on perfect level ground, they can get bound up and it can be very difficult to get everything to release. The buttons here on top are the release buttons to allow the arms to retract, but being just a small button like this, it's very difficult to press them down. Now this one I can press down cause this one's not locked up, but we just got done driving the vehicle around. And this one over here is all locked up tight. And if we go to try to pull the tow bar off, I can not get it off of there, because we are all bound up.Now there is a tool available from Roadmaster that will give you a small hook on the bottom that acts as a lever to press this down to get it released. But if you're in a pinch, you can use a hammer or a mallet, or maybe just another ball mount that you got laying around. And now with that released, we can go ahead and disconnect. Make sure that you apply the parking brake in your vehicle before you disconnect.And now that we've raised it up, we'll put it in its storage position. The same levers that release there, we'll press on those to let our arms retract in. And the arm on the driver's side will actually slide over to the passenger side, collapse in, and it will rest down through the slot right here where we can insert the pin and lock it in place. I will say this pin is a little bit stiff. It should wear out over time and become a little bit easier to get on there. And with our tow bar all wrapped up here, we just need to disconnect the rest of our cables, store them in the vehicle and we're ready for the next job or the next time we're ready to head out.And that completes our look at Roadmasters Stowmaster 5,000 Lunette Ring Tow Bar.

Customer Satisfaction Score:

Customer Reviews

Roadmaster StowMaster Tow Bar - 3" Lunette Ring - Car Mount - 6,000 lbs - RM-583

Average Customer Rating:  4.8 out of 5 stars   (135 Customer Reviews)

Ideal for off-roading, this lunette ring tow bar pairs with your pintle hitch to give your towed car maximum versatility over rough terrain. Mounts to base plate with quick-disconnects and stores on the front of your car while you drive around town.


Having used Roadmaster products for years imagine my surprise when after using my new hitch for only a month the right arm came apart while towing my car. I happened to be looking at it and was able to coast to a stop during a slight uphill grade which prevented my car from any further damage. As it turned out the bolts which hold the arms on had fallen out. Why I don’t know. I was able to use a temporary pin in the slot which allowed me to get to a hardware store where I replaced ALL the bolts holding both arms with grade 8 bolts and nylon locking nuts. The arm slid on the road, ground down a small corner and scuffed the paint but did not compromise the integrity of the hitch. The design works flawlessly even if the quality control could use some closer monitoring. All in all it’s still a great product. As you can see from the photos I doubled up the nylon locking nuts and have had no problems since.


Very satisfied with my etrailer experience William was very professional and knowledgeable I will definitely be a return customer


I was very happy that it only took 3 days to receive my order once it was placed. Joanne who helped me in placing my order was very courteous and professional and made sure all my needs were addressed. I look forward to working with Joanne and the etrailer team again in the future.


Great prices super fast shipping


Came quick, fit perfect






The adjustable arms make this tow bar simple to hook up and disconnect. I can pull up behind our RV and hook up in about 3 minuets (including the wiring for our break buddy and putting the transfer in neutral). Disconnecting and stowing the bar is even faster. Although is tow bar is locked to the baseplate and folds flat it is so easy to remove I end up taking it off and putting it in the back when we will not be towing.


I was slightly nervous that this would be difficult to take on and off if I wasn't on flat ground. So for I have not had any issues and I really like that it hooks up to a 2 inch ball. My jeep has a lift on it and getting things level was easy with and adjustable height mount.


This is a great towbar! I deliver motorhomes professionally and I did use a Blue Ox that went into the receiver hitch that I had to move from hitch to hitch rain or shine. Now all I have to do is put my small lightweight pintle hitch hook into the receiver and just quickly drop this lunette ring onto it easily, but when I’m not using this at all it’s so easy to just remove the whole towbar from my vehicle. I also like how easy it is to fold up so that it’s all compact and out of the way when it’s stowed on the front of my vehicle. This makes my hooking up and unhooking so quick and easy. The only thing I don’t like is when I end my trip on a downhill or slightly turned it’s hard to get this towbar off of the pintle hitch by myself, but I have done it every time with a little back and forth moving of my vehicle.


Love this towbar. By myself, I can hook up to my motorhome and be ready to hit the road in 10 minutes .


This is a very well made hitch. It was very easy to fit, is very robust and very easy to fold away. I bought the optional cover which makes the unit very neat when not in use.


Quick delivery! Bought this as a replacement for one that got bent on a steep hill. A $600 mistake.


It’s been a year and it works great. Adjustable arms make hooking up a breeze.


I am using this on the front of a UTV to pull around so it is plenty strong for that and is working good. I ordered the pintle version so that I could fabricate a clevis style hitch and use a hitch pin to pull behind a pickup or tractor. I only gave 4 stars because the latch on the left sider sometimes has a hard time latching. I don't know if there is a way to adjust the lock or not.


If you are thinking of towing a car this is the company to see. Just installed a base plate and tow bar to my Toyota. Took just 2 hours. With the video and instructions, no problems, very easy. Customer support excellent, very helpful. If you don’t think that you can do this install yourself, think again. I would recommend this tow bar, with the telescoping arms connecting to the car is very simple and secure. This is a 5 star product. Thank You


This product is well made and well engineered. It performs the functions of allowing a reasonable amount of flexibility in coupler/ball alignment, locking into place, smooth vehicle towing and securing into the "stowed" position. Because of my bumper mounted winch, I needed to make some adaptations to the mounting system which the RM-501 accommodated very well. I am very pleased with this purchase.

I will send a couple of installed pictures by seperate email.


Bought this from Etrailer with all the supporting hardware needed to flat tow my Durango. The quality is excellent (stainless steel, very strong), the install was pretty easy. Only issues I had were because of the are of my vehicle.
Towing with it and hooking up is simple. It takes only a minute to go from stowed to hooked up. was easy to deal with, helpful, and shipping was very fast. This is my second order with them, both have been flawless. Their pricing also proved to be the lowest.


Nice, solid product. Easy to install and remove. Sliding action is very smooth, easy to extend and fold. My hitch coupler is slightly different design than shown but seems very heavy duty.


A quality product. Very easy install
the frame mount from the same company, same review


This tow bar is definitely worth the money, it’s high quality heavy made.
This is our second purchase from Etrailer and shipping is really fast. We ordered on Sunday night and it was delivered Tuesday.
Very impressive customer service.


Great tow bar. I've had this model before on a different vehicle. I was so happy with the prior bar I bought this one. It is as great as my first one.


I have been thoroughly satisfied with my Roadmaster tow bar. I use it to tow my Jeep Grand Cherokee behind my Damon RV and could not be happier with the Jeep in tow.

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