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Roadmaster StowMaster Tow Bar - 3" Lunette Ring - Car Mount - 6,000 lbs
(159 reviews)
Price: $960.00
In Stock
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Roadmaster StowMaster Tow Bar - 3" Lunette Ring - Car Mount - 6,000 lbs
Part Number: RM-583
In Stock
$960.00
Retail:$1,724.58
You Save: $764.58
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- All Info
- Reviews (159)
- Q & A (0)
- Photos
Roadmaster Tow Bar - RM-583
Highlights
- 6,000-lb Capacity: Handles tough towing jobs with a steel build tested for heavy road stress.
- 3" Lunette Ring: Pairs with a pintle hitch for smooth, flexible movement over rough terrain.
- AutoLock Arms: Slide out and lock automatically as you pull forward, making hookup quick and secure.
- Stores on Car: Folds and pins to the front of your vehicle, saving cargo space when not towing.
- Self-Lubricated Bushings: Cut friction for longer life and smoother arm motion mile after mile.
Features to know about
Built for the Rough Stuff: Lunette Ring and Pintle Hitch Versatility
When the road ahead turns to rocks, ruts, or washboard, a rigid tow setup can fight you every inch of the way. The 3" lunette ring on the Roadmaster StowMaster pairs with a pintle hitch to give your towed vehicle the movement it needs over uneven terrain. This setup lets the ring tilt up and down and twist side to side far more than a standard coupler, so the bar flexes with the trail instead of against it. The wide range of motion helps protect your gear from damage and keeps towing steady when things get bumpy.
Smooth Hookups Every Time: Stainless Steel Telescoping Arms with Autowlok
Getting lined up doesn’t have to be perfect. The telescoping arms extend from 33" to 40", sliding on stainless steel inner tubes that move freely and resist corrosion. Once you pull forward, the Autowlok mechanism automatically locks both arms into towing position—no pins, no guessing. When you’ve reached your destination, press the release button to disengage. Even if tension builds on uneven ground, the optional release tool (RM-066, sold separately) gives you extra leverage to get unhooked without a fight.
Secure and Simple: Car-Mounted Storage with Quick-Disconnects
The quick-disconnect crossbar makes mounting fast and clean. The entire bar moves as a single piece, so you can hook it up or take it off in minutes. When you’re not towing, the StowMaster folds and pins neatly on the front of your car—no need to find extra storage space. Welded steel plugs keep the internal parts sealed, and a high-tech powder coat keeps rust away. It’s a tough, tidy setup that’s ready to roll whenever you are.
Engineered Strength You Can Trust: FEA-Tested Steel Construction
Every inch of this tow bar is designed for strength. Finite Elemental Analysis (FEA) testing exposes weak points under thousands of pounds of simulated pressure until the design is solid from end to end. The 6,000-lb capacity and full-length crossbar with angle-iron brace deliver confidence mile after mile. Inside each arm, self-lubricating nylon bushings cut friction and absorb road shock, while internal safety straps keep the arms secure even if a latch fails. This kind of overbuilt engineering means you can tow with real peace of mind.
Specs
Compatibility
- 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
Dimensions
- 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 and Capacity
- Weight capacity: 6,000 lbs
- Weight: 38 lbs
Warranty
- Limited lifetime warranty
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
Customer Satisfaction Score:
99% were satisfied with this product
1% of customers were not satisfied
Ratings & Reviews
4.8
159 reviews
by:
Thomas
09/27/2023
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.
by:
JRB
08/13/2020
Very satisfied with my etrailer experience William was very professional and knowledgeable I will definitely be a return customer
by:
Jason
07/29/2025
Great fit and easy install.
by:
Antonio
10/05/2022
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.
by:
Jarvis
08/17/2019
Great prices super fast shipping
by:
Thomas
11/10/2025
by:
Stacey
06/22/2026
by:
Brad
04/29/2026
by:
Carl
10/18/2019
Came quick, fit perfect
by:
Neal
01/02/2021
by:
Robert
02/22/2021
by:
Michael
07/27/2024
by:
Tony
09/29/2022
by:
Robert
08/04/2023
by:
Raymond
04/16/2020
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
by:
Andw W.
02/18/2017
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. Etrailer.com 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.
Towing with it and hooking up is simple. It takes only a minute to go from stowed to hooked up. Etrailer.com 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.
by:
Richard M.
03/24/2018
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.
I will send a couple of installed pictures by seperate email.
by:
Arizona Slim
03/15/2019
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.
by:
Josh
01/08/2026
Awesome setup. Directions on point. Real easy to setup, fifth product purchased from etrailer. Will recommend. !!!!
by:
Daryll V
09/10/2017
Love this towbar. By myself, I can hook up to my motorhome and be ready to hit the road in 10 minutes .
by:
Troy
08/10/2022
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.
by:
Erik
11/03/2022
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.
Erik
11/4/2023
The tow bar is wonderful. The only maintenance is some basic cleaning and lubricating the sliding arms. I love how easy it is to connect and disconnect.
Mike L.
11/15/2023
@Erik Glad to hear that! Keep up on that maintenance, and you'll get years of trouble-free service out of that tow bar...
by:
Voytek
02/26/2026
Good product and good price, easy installtion.
by:
Nick F
02/09/2011
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.
by:
Ashton
03/29/2023
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.
Jenny N.
3/30/2023
Id like to see what I can recommend about the left side that is difficult to latch. Would you be able to send a picture of it? The spot that you are talking about specifically? Have you had a chance to clean and lubricate the tow bar?
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See what our Experts say about this Roadmaster Tow Bar
- Pintle Hooks that Can be Used with Stowmaster Tow Bar with Lunette RingHey Craig, so the Curt pintle part # C48005 that you referenced is designed for lunette rings that are 2-1/2 inch in diameter like the part # RM-581 and not the 3 inch ring part # RM-583. For a similar pintle hook that fits both sizes we have the part # 337RM5P.
view full answer... - Replacement Arm With 3" Pintle Ring For a Roadmaster StowMaster Tow BarYes, we do have the Replacement Coupler Arm Assembly # RM55SR which has the 3" lunette ring like is found on the Roadmaster StowMaster Tow Bar # RM-583.
view full answer... - Availability of Adapter to Connect Roadmaster StowMaster Tow Bar to Blue Ox Base PlatesBlue Ox Base Plates, such as the Base Plate Kit # BX1709 that is confirmed to fit your 2007 Chevy TrailBlazer, are designed for use with motor home mounted tow bars only. Since the Roadmaster StowMaster Tow Bar # RM-583 that you referenced is a coupler/vehicle mounted tow bar, there is not an adapter available that will allow it to fit the Blue Ox Base Plates on your vehicle. Since you already have Blue Ox base plates installed on your vehicle, your best option will be to go with a Blue...
view full answer... - Availability of Tow Bar with Lunette Ring that Has 3 inch DiameterThe lunette ring style of Blue Ox tow bars like the part # BX7460P are only available in the 2-1/2 inch size but we do have a Roadmaster tow bar that has a 3 inch ring with the part # RM-583.
view full answer... - Roadmaster Tow Bar Compatibility With 1990 Chevy Suburban The Roadmaster StowMaster Tow Bar - Car Mount - 3" Lunette Ring - 6,000 lbs # RM-583 can be used to tow a 1990 Chevy Suburban. It will work well with the Roadmaster Crossbar-Style Base Plate Kit - Fixed Arms # 108-1 and safety cables # RM-643. I also recommend the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit # RM-15267, and the Demco SBS Stay-IN-Play DUO Supplemental Braking System - Proportional # SM99251. You will also need to make sure the pintle hitch you use to pull...
view full answer... - Lunette Ring Tow Bar Recommendation for Flat Towing 2004 Chevy SilveradoFor a tow bar we have the Roadmaster Stowmaster part # RM-583 which has a 6k capacity and uses a 3 inch Lunette ring. So then for a base plate kit you'd want the part # 3115-1 for if you have a 1500HD, 2500HD, or 3500HD. If you have a 1500LD Z71 you'd want the part # 199-5 or part # 199-10 for if you have a 1500LD that's not a Z71. For lighting you can use the diode kit, # RM-15267, and not have to worry about cutting into the taillight housing. This will splice into your taillight wiring...
view full answer...
Do you have a question about this Tow Bar?
Info for this part was:
Edited by:
Lindsey S
Expert Research:
Jameson C
Video Edited:
Joshua S
Video Edited:
Chris R
Video by:
Dustin K
Installed by:
Cole B
Updated by:
Shelly K
Updated by:
Wilson B
Updated by:
Kristina F
Updated by:
Mike S
Updated by:
Isabelle B
Updated by:
Amanda K
Written by:
Amanda M
Test Fit:
David F
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Troy
8/11/2023
Still works great!