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  1. Tow Bar
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Roadmaster StowMaster Tow Bar - Coupler Style for 2-5/16" Ball - Car Mount - 6,000 lbs
Roadmaster

Roadmaster StowMaster Tow Bar - Coupler Style for 2-5/16" Ball - Car Mount - 6,000 lbs

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$995.00
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With stainless steel arms, this coupler-style tow bar extends smoothly to reach your ball mount. Mounts to the base plate with quick-disconnects, and stores on the front of your vehicle while you drive around town. For 2-5/16" ball. Great Prices for the best tow bar from Roadmaster. Roadmaster StowMaster Tow Bar - Coupler Style for 2-5/16" Ball - Car Mount - 6,000 lbs part number RM-504 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Roadmaster Tow Bar

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

With stainless steel arms, this coupler-style tow bar extends smoothly to reach your ball mount. Mounts to the base plate with quick-disconnects, and stores on the front of your vehicle while you drive around town. For 2-5/16" ball.


Features:

  • Safely bring your vehicle along behind your RV
  • Easy hookup with arms that smoothly extend and pivot to reach the ball mount
    • 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


Specs:

  • 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: 2-5/16" ball
  • Arm length (as measured from center of hitch ball to center of quick-disconnect bar):
    • Extended: 44-1/2"
    • Retracted: 36"
  • Weight capacity: 6,000 lbs
  • Weight: 38 lbs
  • Limited lifetime warranty


Smooth Hookup with Stainless Steel Arms

The StowMaster is designed to make hooking up your toad (towed vehicle) a smooth and easy process. The telescoping arms are able to extend to the needed length and angle to reach your RV's ball mount 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. With the pins on both arms released, 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 press the button all the way down and 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

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.


FOLDED STOWMASTER

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 pretty compact, 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 displays 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.



504 Road Master Stow Master Coupler-Style Towbar for 2-5/16" Hitch Ball - Vehicle Mount - 6K Rating

Item # RM-504

Installation Details RM-504 Installation instructions



Customer Satisfaction Score:


Customer Reviews

Roadmaster StowMaster Tow Bar - Coupler Style for 2-5/16" Ball - Car Mount - 6,000 lbs - RM-504

Average Customer Rating:  4.8 out of 5 stars   (142 Customer Reviews)

With stainless steel arms, this coupler-style tow bar extends smoothly to reach your ball mount. Mounts to the base plate with quick-disconnects, and stores on the front of your vehicle while you drive around town. For 2-5/16" ball.

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QUICK delivery, GREAT service



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See what our Experts say about this Roadmaster Tow Bar

  • Roadmaster Parts Needed to Flat Tow 2006 Mini Cooper
    Hey Eric, we have the Roadmaster EZ base plate kit part # 521876-1 that fits your 2006 Mini Cooper which would work great with your Stowmaster 6000 tow bar # RM-504. 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 to allow your tow vehicle to control the taillight assemblies of the towed vehicle. This comes with a round 6-way connector that you will install on the front of your...
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  • Recommended Base Plate Kit for a 1997-2003 Ford F-150
    The base plate kits for a Ford F-150 will be the same from 1997-2003 with the exception of Lightning, Harley Davidson, and Diesel editions. As long as you do not have one of these editions then I recommend using the Roadmaster XL Base Plate Kit part # 456-15 for 4 wheel drive (4WD) models or part # 492-1 for 2 wheel drive (2WD) models. Unfortunately, we do not carry any universal base plate kits therefore this will be your best option. For a tow bar that will work with either set of the...
    view full answer...
  • Roadmaster Base Plate Kit to Use with Stowmaster Tow Bar for 1995 Jeep Wrangler
    For your 1995 Jeep Wrangler YJ and your Roadmaster Stowmaster tow bar like the # RM-504 the base plate kit you'd need is the part # 1409-3 and you'd be set.
    view full answer...
  • Parts Needed to Flat Tow a 2013 Jeep Wrangler Unlimited Behind an RV with Stowmaster Tow Bar
    If your 2013 Jeep Wrangler Unlimited has the standard factory bumper you can use EZ4 base plates # RM-521448-4. If it is a 10th anniversary addition but does NOT have the American Expedition Vehicles bumper you can use # 1444-1. If it is a MOAB addition OR has the Warn Elite bumper and is NOT a 10th anniversary model you can use # 1439-1. All of these base plates are compatible with the Stowmaster # RM-501 or # RM-504. In addition to the tow bar and base plates you will also need safety...
    view full answer...
  • Can a 2018 Ford Fiesta be Flat Towed by a Ford F-150
    You definitely can use a pickup to tow your 2018 Ford Fiesta as long as the Fiesta doesn't exceed the weight ratings of the pickup or the trailer hitch. I am not sure what year Ford F-150 you are wanting to use but if you look in your owner's manual it will tell you the max weight rating for your pickup. A 2018 Fiesta should weigh somewhere between 2,500 lbs - 2,800 lbs though so your F-150 should have an easy time towing it. The Roadmaster Direct-Connect Base Plate Kit # RM-524441-5 does...
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  • Is the Roadmaster StowMaster Compatible with EZ4 Base Plates on a 2015 Volkswagen Golf TDI
    Yes, the Roadmaster StowMaster Tow Bar # RM-504 is compatible with the Roadmaster Crossbar-Style Base Plate Kit # RM-521239-4 on your 2015 Volkswagen Golf TDI. For a complete flat towing setup you will need a base plate kit, tow bar, safety cables, vehicle tow bar wiring, a supplemental braking system, and possibly a high-low adapter. If you do not have all of these components just let me know and I can make some additional recommendations for you.
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  • Which Base Plates Are Needed to Use Roadmaster StowMaster 502 on 2016 Jeep Grand Cherokee
    If you're wanting to use the Roadmaster StowMaster Tow Bar - Car Mount - 2-5/16" Ball - 6,000 lbs # RM-504 on your 2016 Jeep Grand Cherokee you'll need compatible base plates like the Roadmaster Crossbar-Style Base Plate Kit - Removable Arms # RM-521440-4. If you just need the quick disconnects then you'll need the Roadmaster Tow Bar Quick Disconnects - Car Side Only # RM-222. If you need any other components to complete your flat towing setup for your 2016 Jeep Grand Cherokee I've linked...
    view full answer...
  • Flat Tow 2013 Chevrolet Spark
    There are 2 models of StowMaster Tow Bars available, the # RM-501 and the # RM-504. Both are a coupler style and rated for 6,000 lbs. with one for a 2" ball the other for a 2-5/16". For the 2013 Chevrolet Spark, the StowMaster tow bars will match with the Roadmaster Crossbar-Style Base Plate Kit, # 523174-1. For a lighting kit, I recommend the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit # RM-15267. I recommend the Blue Ox Patriot Portable Braking System, # BLU37TR. This...
    view full answer...
  • Does Roadmaster Base Plate Kit Fit Tracker and Stowmaster Tow Bar
    Yes the Roadmaster base plate kit part # 1188-1 is perfectly compatible with the Roadmaster Stowmaster part # RM-504 and the Tracker # RM-020.
    view full answer...
  • Recommended Solution for Vehicle Mounted Tow Bar Compatible with Roadmaster EZ Base Plates
    I may have a solution for you, but the Curt Tow Bar with Adjustable-Width Arms - Car Mount - 2" Ball - 5,000 lbs # C19745 cannot be stored on the vehicle and there's not an available solution that would allow it to function in the manner you're seeking. If you wanted a tow bar that is stowed on the vehicle, the Roadmaster StowMaster Tow Bar - Car Mount # RM-501 (2" hitch ball) or # RM-504 (2-5/16" hitch ball) would be the best solution. It looks like you've also got Roadmaster EZ base...
    view full answer...
  • Recommended Flat Towing Equipment For A 2013 Jeep Wrangler Unlimited
    The correct fitting base plate for your 2013 Jeep Wrangler Unlimited that will also be compatible with your Roadmaster Eagle 5000 tow bar is the Roadmaster Crossbar-Style Base Plate Kit - Removable Arms # RM-521448-4. The curb weight on a 2013 Jeep Wrangler Unlimited is 3874lbs - 4921lbs so I recommend you ensure you aren't going to go over the 5,000lbs weight capacity of your Roadmaster Eagle 5000. If you want to stick with a ball mount tow bar you can upgrade to the Roadmaster StowMaster...
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  • Parts Needed to Flat Tow 2002 Jeep Liberty with Tow Ready Tow Bar
    The only way we can recommend you tow a vehicle like your 2002 Jeep Liberty with the Tow Ready Tow Bar part # 63180 is to use the adapter part # RM-025 with a Roadmaster base plate kit # 521426-1. You should keep in mind that the Tow Ready Tow Bar has a lower speed rating of 45 mph than most so you might be better off with a different tow bar like the Roadmaster Stowmaster part # RM-504 which wouldn't require the adapter either.
    view full answer...
  • Parts Needed to Flat Tow 1991 Dodge Dakota
    Typically when it comes to older vehicles if they have a manual transmission you can generally tow them, but it's always best to confirm that in your owner's manual or with your local dealer if you're fresh out of a manual. If you are able to flat tow your 1991 Dodge Dakota then I recommend using the following parts: Roadmaster Crossbar-Style Base Plate Kit - # 210-1 StowMaster Tow Bar - # RM-504 (fits 2-5/16" hitch ball - be sure to use a ball mount that allows the tow bar to sit level) Safety...
    view full answer...
  • Recommended Flat Towing Equipment For A 1999 Ford Ranger
    To tow your 1999 Ford Ranger you could use the Roadmaster StowMaster Tow Bar - Car Mount - 2-5/16" Ball - 6,000lbs # RM-504. You would need some Roadmaster base plates like the Roadmaster Crossbar-Style Base Plate Kit - Removable Arms # 483-1 for it to connect to. To flat tow you would also need a braking system, tow bar wiring kit, and safety cables. For the tow bar wiring kit I recommend just using some magnetic lights like the Roadmaster Standard Magnetic Tow Lights # RM-2120 to simply...
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  • Comparing Roadmaster Base Plate Kits for a 2006 Honda Element EX
    The Roadmaster Direct-Connect Base Plate Kit part # 1541-5 and Roadmaster Crossbar-Style Base Plate Kit part # 1541-1 are both fits for a 2006 Honda Element EX. The former is a more seamless design and what I recommend but the latter will still work if you're trying to save money on the tow bar. The Roadmaster StowMaster Tow Bar part # RM-504 is designed for the Roadmaster Crossbar-Style Base Plate Kit and the Roadmaster Falcon All Terrain, Non-Binding Tow Bar part # RM-522 is designed...
    view full answer...
  • Tow Bar Availability that Can Easily Store on Front of Towed Vehicle When Not In Use
    I wish we had a way to store the Curt tow bar part # C19745 vertically on a vehicle it's towing. You'd have to go with a tow bar that has more features to be able to accomplish that like the Roadmaster Stowmaster part # RM-504 which I attached a picture of that shows it stowed on the front of a vehicle.
    view full answer...
    Image 1 for
  • Is the StowMaster Tow Bar Compatible with Roadmaster XL Base Plate Kit on a 2001 Mazda Miata
    Yes, the Roadmaster Crossbar-Style Base Plate Kit # 711-4 for your 2001 Mazda Miata is compatible with both the 2" Hitch Ball # RM-501 and 2-5/16" Hitch Ball # RM-504 versions of the StowMaster tow bar. I reached out to my contact at Roadmaster who did say that it will fit but he is afraid that you will be putting too much weight at the front of your Miata since the tow bar stows there. He recommended going with a motorhome mounted tow bar like the Falcon 2 # RM-520 instead since it stores...
    view full answer...
  • Parts Needed to Flat Tow 2005 Toyota Tacoma
    There are base plates that fit your 2005 Toyota Tacoma, though the Roadmaster # RM-521196-5 base plates you referenced are not a fit. In regards to if this truck can be flat towed, I looked in the online version of the owner's manual and was not able to find any reference to if this truck could be flat towed (sometimes called Recreational Towing) so I recommend contacting your local Toyota dealer to find out if this truck can be flat towed. In regards to each of the other parts you need...
    view full answer...
  • Parts Needed to Flat Tow 1988 Toyota Truck
    Your photo did not come through, but I looked up the tow bar you referenced and can tell you based on that it will not connect with the Roadmaster Crossbar-Style Base Plate Kit # 1146-1. We do have an option that will work for you with these base plates, the Roadmaster StowMaster Tow Bar - 2" Ball # RM-501 or StowMaster - 2-5/16" Ball # RM-504. Otherwise you would need a universal type of tow bar such as the Curt Tow Bar with Adjustable-Width Arms - Car Mount - 2" Ball # C19745 which comes...
    view full answer...
  • 2017 Subaru Crosstrek Manual Transmission Base Plate and Tow Bar Options
    As long as you have a manual transmission on your 2017 Subaru Crosstrek you can use the Roadmaster EZ2 Base Plate Kit - Removable Arms # 52922-1A which is compatible with Falcon 2 # RM-520, Stowmaster # RM-501 or # RM-504, Falcon # RM-522, Sterling # RM-576, or BlackHawk 2 # RM-422. Another base plate option is the Blue Ox Base Plate Kit - Removable Arms # BX3620. This baseplate is compatible with the Alpha # BX7380, Aladdin, Avail # BX7420, or Acclaim # BX4330. Let me know if you'd...
    view full answer...
  • What Is Needed To Flat Tow A 1987 Toyota Pickup
    To flat tow a vehicle you need 5 basic components and possibly a few other items to conform these 5 items to best fit your specific combination of tow vehicle and vehicle being towed. 1) Tow-Bar 2) Base Plates, that are vehicle specific 3) Safety Cables 4) Wiring Solution, something to tie the two vehicles indicator lights to the vehicle being towed 5) Supplemental Braking For your 1987 Toyota Pickup we have the Roadmaster Crossbar-Style Base Plate Kit, # 1117-1. This will require...
    view full answer...
  • Folding Tow Bar That Stores on Front of 2009 Toyota Corolla
    We have a few different tow bars that fold up and store on the front of the vehicle. I'm assuming you want to attach this to a hitch ball and don't plan to use a lunette ring. Since the Blue Ox needs greater spacing than the base plates that fit your Corolla the only option is the Roadmaster StowMaster Tow Bar # RM-501. This fits a 2" ball and folds up on the front of your vehicle. For the same option that fits a 2-5/16" ball you can use the # RM-504. Then for a base plate kit you will...
    view full answer...
  • Base Plates And Wiring Needed to Flat Tow 2017 Lincoln MKX Behind Motorhome
    For your 2017 MKX EcoBoost, I'd recommend the Roadmaster # RM-524447-4 EZ4 base plate, which is compatible with the Stowmaster Tow Bar like # RM-504. If you don't already have them, I'd recommend the # RM-643 safety chains. To wire up the taillight circuits, I'd recommend # RM-15267. You'll also need a supplemental braking system if you don't already have one. A portable system like the Blue Ox Patriot # BLU37TR won't require expensive labor to install and can be moved between vehicles...
    view full answer...
  • Compatibility of the Adapter Brackets # BX88151 with the Roadmaster StowMaster # RM-504
    The Roadmaster StowMaster Tow Bar # RM-504 is an economy tow bar so it doesn't have the ability to adapt the arms to fit with the Blue Ox Base Plate Adapter Brackets # BX88151 but you can use the Roadmaster Falcon 2 Tow Bar # RM-520 instead.
    view full answer...

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Info for this part was:

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