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Roadmaster Crossbar-Style Base Plate Kit - Removable Arms

Roadmaster Crossbar-Style Base Plate Kit - Removable Arms

Item # RM-521453-4
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Retail:$498.00
Our Price: $434.96
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Product Expert Mike S

Is this right for you? Product Expert Mike S says:

Yes, if you:

  • Are a DIYer and want a simple install
  • Have a hitch-mounted or car-mounted tow bar from Roadmaster
  • Value the protection of a lifetime warranty

No, if you:

  • Own a tow bar that's not from Roadmaster and don’t want to have to buy an adapter separately
Roadmaster's crossbar-style brackets are virtually invisible, easy to mount and simple to remove. Brackets install on your vehicle's frame to provide attachment points for your tow bar. Call 800-298-1624 to order Roadmaster base plates part number RM-521453-4 or order online at etrailer.com. Free expert support on all Roadmaster products. Guaranteed Lowest Price and Fastest Shipping for Roadmaster Crossbar-Style Base Plate Kit - Removable Arms. Base Plates reviews from real customers.
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  • Reviews (640)
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  • Why etrailer?

Roadmaster Base Plates - RM-521453-4

  • Removable Drawbars
  • Roadmaster
  • Twist Lock Attachment

Roadmaster's crossbar-style brackets are virtually invisible, easy to mount and simple to remove. Brackets install on your vehicle's frame to provide attachment points for your tow bar.


Features:

  • Hidden bracket design provides improved aesthetics compared with standard brackets
    • Crossbar-style brackets sit far back for a supremely clean look
  • Drawbars attach and remove quickly and easily
    • Arms click to lock in place in brackets
    • Built-in pull rings let you unlock arms so you can twist and remove them
  • Computer-cut, all-steel construction provides exceptional strength
  • Black powder coat finish is durable and corrosion resistant
  • Simple installation - no welding required
    • Custom base plates ensure a perfect fit for your vehicle
  • Integrated mounting points let you easily attach an electrical connector plug or bracket (sold separately)
  • Compatible with Roadmaster tow bars with use of quick-disconnect crossbar (910021-00 - sold separately)
  • Instructions and mounting hardware included
  • Made in the USA
  • Limited lifetime warranty


The drawbars, or front arms, on the crossbar-style series base plate kit are supremely easy to mount and remove. Just insert them into the brackets and twist to lock them in place. To remove, simply twist the arms back and pull them out. Once the drawbars have been removed, the remaining brackets are virtually invisible. On most automobiles, the brackets are mounted within the grille, where they remain not only unseen, but protected from scrapes and scuffs, as well.



521453-4 Road Master EZ4 Base Plate Kit

Installation Details RM-521453-4 Installation instructions

This Product Fits The Following Vehicles





Customer Reviews

Roadmaster Crossbar-Style Base Plate Kit - Removable Arms - RM-521453-4

Average Customer Rating:  4.8 out of 5 stars   (638 Customer Reviews)

Roadmaster's crossbar-style brackets are virtually invisible, easy to mount and simple to remove. Brackets install on your vehicle's frame to provide attachment points for your tow bar.

- RM-521453-4
by:
2019 Jeep Wrangler

Great product and thanks to etrailer.com for the excellent videos detailing how to install the Demco Stay-In-Play Duo braking system. As a result of watching all of the available videos, I learned that there where a couple of different ways to install the system in our Jeep Wranglers. The first installation I did was in our 2019 Wrangler and that was super easy following the one video on your website. The second installation of the system was not as easy because our 2021 Wrangler has a manual transmission and required having to drill a hole in the firewall/floor board to run the wiring and vacuum tube from the passenger compartment to the engine area. If etrailer.com ever has an installation on a Jeep Wrangler with a manual transmission to perform, hopefully they will video tape that installation to guide customers with Jeeps with manual transmissions. I think etrailer.com's idea of mounting the control box on the fuse box is by far the cleanest and easiest way to install the Demco braking system. I also followed etrailer.com's videos for installing the brake light system and the base plate on both our Wranglers and could not be happier with them. Thanks etrailer for all you offer.



- RM-521453-4
by:

Installed these on my 2018 wrangler. Awesome instructions! Very happy with how it turned out. The videos in the web site are worth the watch.



- RM-521453-4
by:
Jeep Wrangler

Absolutely great, easy install and hitches are hidden when the tow arms are removed , takes seconds by pulling the pin and a simple twist , I highly recommend buying this product, Installed in 2 hours on a 2020 jeep 2 door wrangler.



- RM-521453-4
by:

Thank you Steven for a well done job. All representatives at eTrailer have always done a great job in my dealings over the years.



- RM-521453-4
by:

Works fine installed nicely



- RM-521453-4
by:
2020 GMC Terrain

Recently I ordered a Roadmaster Sterling All Terrain Tow Bar (RM-576) and a Roadmaster Crossbar-Style Base Plate Kit (RM-521453-4). The included Roadmaster installation instructions were very good and easy to follow. A few minor questions came up during the installation, but eTrailer's excellent installation video by Shane cleared up any confusion. Overall the installation of both the base plates and the tow bar was pretty simple and straight forward. I think eTrailer's product and installation videos are a great help in picking the right item and installing it.



- RM-521453-4
by:
2021 Jeep Gladiator

Arrived on time and easy installation. Thanks



- RM-521453-4
by:

Very well made. Will give an update soon as I get it installed thanks



- RM-521453-4
by:
2021 Jeep Gladiator

This was shipped from the manufacturer and quicker then expected A+ !!! Thank you



- RM-521453-4
by:

Great item! Great service!



- RM-521453-4
by:

Product fit well and mounted with very few issues.



- RM-521453-4
by:
2020 Jeep Wrangler Unlimited

base plates are well made very heavy duty, had to do some slight modifications on the plastic shield but other than that worked out well, now i have to buy a tow bar



- RM-521453-4
by:

On line shopping and order processes are easy. On line pictures and videos are most helpful. Ordered and received in 3 days. Thank you for your outstanding service.



- RM-521453-4
by:



- RM-521453-4
by:

Easy install.



- RM-521453-4
by:

Perfect



- RM-521453-4
by:
2020 Jeep Gladiator

Fast delivery and exactly as ordered.



- RM-521453-4
by:



- RM-521453-4
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- RM-521453-4
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- RM-521453-4
by:
2021 Jeep Gladiator



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Show More Reviews

Ask the Experts about this Roadmaster Base Plates

  • Best Parts Needed to Flat Tow 2019 Jeep Wrangler JL Recommendation
    Thanks for the picture of your 2019 Jeep Wrangler! Based on that we know that you do have the plastic bumper so the Roadmaster base plate kit part # RM-521453-4 is the correct fit and will work great. It's the easiest to use option to so I think you'll like it the best. The lightest weight and easiest to use compatible tow bar is the aluminum Roadmaster Nighthawk part # RM-676 which would be your best option for sure. The # SM99243 is also a really great option so you are on the right...
    view full answer...
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  • Which Flat Towing Base Plates for 2021 Jeep Wrangler Unlimited
    By 'front tow bar', I'd assuming you're meaning base plates, is that correct? Unfortunately, the front of the 2021 Wrangler Unlimited is different enough that your old base plate kit won't work. I'd recommend the direct connect # RM-521453-5 over the # RM-521453-4 crossbar style because of it's cleaner look. It also has fewer parts which makes the hook up/disconnect procedure a bit easier. The price is the same, so why not hit the 'easy' button. This is a confirmed fit for your Wrangler...
    view full answer...
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  • Is Roadmaster Stowmaster 5000 Tow Bar Compatible with Base Plate for 2020 Jeep Wrangler Unlimited
    Yes, the Roadmaster Stowmaster 5000 tow bar you have is perfectly compatible with the Roadmaster base plate kit # RM-521453-4. The crossbar of your tow bar would connect to the removable arms of this base plate kit and you'd be set.
    view full answer...
  • Parts Needed to Flat Tow 2020 Jeep Wrangler Willys with Plastic Rock Guard
    Do you have a front picture of your Wrangler that I can check out and see if we have a solution?
    view full answer...
    Image 1 for
  • Recommended Flat Towing Setup For 2021 Jeep Wrangler That Uses Car Mounted Tow Bar
    I would be happy to recommend everything you will need to flat tow your 2021 Jeep Wrangler behind your Airstream Atlas with a vehicle mount tow bar. Starting with the base plate kit I recommend the Roadmaster Crossbar-Style Base Plate Kit - Removable Arms # RM-521453-4 which will fit your Jeep as long as you have the factory steel or plastic front bumper. This base plate kit will pair up perfectly with the Roadmaster StowMaster Tow Bar - Car Mount - 2" Ball - 6,000 lbs # RM-501 which...
    view full answer...
  • Can I Use the Roadmaster Direct Connect Base Plates with Winch Attached to my 2020 Jeep Wrangler JLU
    The Roadmaster Direct Connect Base Plates # RM-521453-4 are going to install in the area that the skid plate is located, not on top of the bumper or in front of it, which is where I'm assuming most of winches are going to be mounted. If you've got an aftermarket bumper where the winch is mounted behind the bumper area and the rope winch has rollers on the front, it still isn't going to interfere. I've linked our installation video of these base plates for you to have a look at, as well.
    view full answer...
    Image 1 for
  • Parts Needed to Flat Tow 2021 Jeep Wrangler Unlimited and 2019 Ford F-150
    The first thing you'd need is a base plate kit like the Roadmaster part # RM-521453-4 for the 2021 Jeep Wrangler Unlimited and then for the 2019 Ford F-150 you'd want the # RM-524431-4. Then for a tow bar with enough weight capacity for either vehicle the Roadmaster Falcon part # RM-522 would be a really great option. For an easy to use supplemental braking system that's removable the best option is the Blue Ox Patriot part # BRK2019. Then for wiring the part # RM-15247 would work great.
    view full answer...
  • Difference Between Roadmaster Base Plate Kits for 2019 Jeep Wrangler Unlimited
    Well you're right that it's not EZ1! In fact, Roadmaster quit using the EZ4 and EZ5 names in the baseplates. Now they're called Crossbar-Style and Direct-Connect because it's more clear. The main difference between the two styles, part # RM-521453-4 for the Crossbar-Style and # RM-521453-5 for the Direct-Connect style, base plate kits is how they connect to the tow bar. The Crossbar-Style kit uses Roadmaster's tow bars that have a crossbar to make the connection. They also fit the Roadmaster...
    view full answer...
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  • Base Plate Kit to Tow 2020 Jeep Gladiator with Roadmaster Falcon for Blue Ox Base Plate Kits
    In the picture you sent in the end of the tow bar has the triple lug setup of a Blue Ox tow bar. This would indicate that the tow bar you have is the Falcon for Blue Ox base plate kits part # RM-525 which means the base plate you should have ordered was the Blue Ox part # BX1142 for your 2020 Jeep Gladiator.
    view full answer...
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  • Are Roadmaster and Demco Base Plate Arms Interchangeable on 2020 Jeep Gladiator
    Parts from Demco and Roadmaster are not interchangeable so you would not be able to use Demco arms with the Roadmaster Crossbar-Style Base Plate Kit - Removable Arms # RM-521453-4 on your 2020 Jeep Gladiator. Otherwise, here are the parts you'll need to flat tow your 2020 Jeep Gladiator, and I have also added links to instructions and video reviews for you to check out. - Base Plate Kit: Roadmaster Crossbar-Style Base Plate Kit - Removable Arms # RM-521453-4 - Tow Bar: Roadmaster...
    view full answer...
  • Mounting Location for Breakaway Switch on Roadmaster Base Plates for 2018 Jeep JL Wrangler
    The Roadmaster Base Plate Kit # RM-521453-4 referenced in your question does not feature a mounting space for a breakaway switch. This is really the case for any of the base plate kits we have available as it's really best to attach the breakaway switch and bracket directly to the vehicle and not an external attachment like the base plates or tow bar. On your 2018 Jeep JL Wrangler your best option may be to attach it to the underside of the front fascia/bumper.
    view full answer...
  • Parts Needed to Flat Tow 2018 Jeep Wrangler JL with Roadmaster Tow Bar
    The Roadmaster Stowmaster Tow Bar # RM-501 wouldn't be the tow bar to get to flat tow your 2018 Jeep Wrangler Unlimited JL based on the base plate kits that are available for your vehicle. There are only direct connect base plate kits for your vehicle available like the # RM-521453-5 which require tow bars that mount in a hitch on the vehicle like the Roadmaster Falcon # RM-520. The base plate kit is what provides the connection point on the vehicle for the tow bar to attach to. For...
    view full answer...
  • Does Steering Wheel of 2020 Jeep Wrangler JL Need to Be Unlocked When Flat Towing
    The 2020 Jeep Wrangler JL does not have a steering wheel lock. In 2008 Jeep did away with that function so if your plan is to flat tow your JL you do not need to worry about the steering wheel being locked. There are very specific instructions in your owners manual about flat towing though that you need to follow. The Roadmaster base plate kit part # RM-521453-4 is the correct kit for your JL though. I attached an install video for more info on the kit as well.
    view full answer...
  • Parts Needed to Flat Tow 2018 Jeep Wrangler JL
    Flat towing components can end up pretty expensive but we do have everything you'd need to flat tow your 2018 Jeep Wrangler JL. The first thing you need is a base plate kit like the # RM-521453-4 which is a confirmed fit and has removable arms for when not in use. In addition to the base plates, you will also need a compatible tow bar, safety cables, lighting, and supplemental braking to flat tow your vehicle. The most popular compatible tow bar is the Falcon All Terrain, # RM-522....
    view full answer...
  • Parts Needed to Flat Tow 2018 Jeep Wrangler Sahara Unlimited JL
    I'd love to help. The first thing you need is a base plate kit confirmed as a fit for your 2018 Jeep JL Wrangler Unlimited. For that we have the # RM-521453-4 from Roadmaster. In addition to the base plates, you will also need a compatible tow bar, safety cables, lighting, and supplemental braking to flat tow your vehicle. The most popular compatible tow bar is the Falcon All Terain, # RM-522. This has non-binding arms which makes the setup very easy to connect/disconnect. For lighting/safety...
    view full answer...
  • Roadmaster EZ 4 or EZ 5 Base Plate for Flat Towing Vehicle Behind RV
    The difference between the EZ 4 # RM-521453-4 and the EZ5 # RM-521453-5 base plate kits is that the EZ 5 is a direct connect with no crossbar and the EZ 4 doesn't use a crossbar. Essentially, you'd want to match the base plates to the tow bar you're using. This involves how the tow bar attaches to the base plates. The Falcon 2 # RM-520 tow bar uses a crossbar, therefore you'd want to use the EZ 4 base plate. For a tow bar such as the # RM-677 Roadmaster Nighthawk that doesn't use a crossbar,...
    view full answer...
  • Will Roadmaster Guardian Rock Guard Fit 2018 Jeep JL Wrangler with EZ4 Base Plates
    Yes, the Roadmaster Guardian Rock Guard # RM-4000 will absolutely fit the EZ4 Roadmaster Crossbar-Style Base Plate Kit # RM-521453-4 that you have on your 2018 Jeep JL Wrangler. The Guardian is going to do a superb job of keeping your Wrangler from any unnecessary damage when you're towing. I've added a link to a video review of the Guardian Rock Guard for you to check out as well.
    view full answer...
    Image 1 for
  • Can Roadmaster Base Plate Kit for 2018 Jeep Wrangler JL Be Used with Duncan Towmatic II Tow Bar
    You can use the Roadmaster Base Plate kit part # RM-521453-4 that fits your 2018 Jeep JL Wrangler with your Duncan Towmatic II tow bar but you do have to use an adapter # RM-038. For lighting/safety cables, locks, and covers for the tow bar we have the Roadmaster Falcon All Terrain kit part # RM-9243-1 which comes with all of that as one part number. The diode kit that comes with this allows you to splice into the taillight wiring so that your RV controls the vehicle taillights and...
    view full answer...
  • Base Plate and Tow Bar Wiring Kit Recommendation for 2018 Jeep Wrangler JL Unlimited
    For your 2018 Jeep Wrangler JL what you'd need is the Roadmaster Base Plate kit part # RM-521453-4 which is confirmed as a fit for your vehicle and will work well with your Roadmaster Stowmaster # RM-501. Then for wiring you'd need the part # RM-146 as a 6-way to 6-way coiled adapter and then for the wiring and diodes part # RM-152 and you'd be set.
    view full answer...
  • Baseplate Torque Specs For Item # RM-521453-4 On A 2021 Jeep Wrangler Sport S
    If the base plate Item # RM-521453-4 did not come with thread locker then we recommend using red loctite Item # LT37420. The instructions will tell you what thread locker to use. I have found the if it is not in the kit it will be red. As far as the torque specs, I am an installer and we go by the manufacturers recommendations on the instruction sheet. The specific bolts you are speaking about do not have torque specifications listed. It is advised by Roadmaster to tighten the bolts down...
    view full answer...
  • Base Plate Kit that is Compatible with 2021 Jeep Gladiator and Roadmaster Tow Bar
    The Roadmaster Crossbar Base Plate part # RM-521453-4 is a fit for your 2021 Jeep Gladiator and is compatible with all Roadmaster tow bars including the Stowmaster # RM-501 you have.
    view full answer...
  • Roadmaster Tow Bar and Base Plates Compatibility With 2021 Jeep Gladiator
    The # RM-576 tow bar will connect to the # RM-521453-4 with no issues and to your 2021 Jeep Gladiator. The # RM-521453-4 base plates will come with new twist-lock arms. If the arms you have for your Honda CRV are Roadmaster then they should also work with your base plates.
    view full answer...
  • What is the Difference Between the Roadmaster EZ4 and EZ5 Base Plate Kits on a 2021 Jeep Wrangler
    That is a great question because overall there is not much of a difference. The difference between the Roadmaster Crossbar-Style Base Plate Kit (EZ4) # RM-521453-4 and the Roadmaster Direct-Connect Base Plate Kit (EZ5) # RM-521453-5 is going to be in what type of tow bar attaches to each base plate. The # RM-521453-4 (EZ4) will use a crossbar style tow bar like the etrailer SD Non-Binding Tow Bar for Roadmaster Crossbar-Style Base Plates # e44ZR. The # RM-521453-5 (EZ5) will use a...
    view full answer...
  • What Do I Need To Flat Tow A 2021 Jeep Wrangler Unlimited With A Rock Guard
    If you are going to flat tow with a Roadmaster Nighthawk tow bar, you will need to use accessories that are compatible. The base plate I recommend is the Roadmaster Crossbar-Style Base Plate Kit - Removable Arms, part # RM-521453-4. With this baseplate and towbar combination you will have everything you need to flat tow your Jeep Wrangler Unlimited. The last thing you will need is a rock guard that can attach to your tow bar mounting bracket. My choice is the Roadmaster Guardian Rock...
    view full answer...
  • Parts Needed to Flat Tow 2014 Jeep Wrangler Behind Motorhome
    First thing you'll need is a base plate kit to flat to your 2014 Jeep Wrangler, which for that I recommend the Roadmaster # RM-521448-5 as is one of the easiest to use options and also is mostly hidden when not in use. I attached an install video for this for you to check out as well. In addition to the base plates, you will also need a compatible tow bar, safety cables, lighting, and supplemental braking to flat tow your vehicle. The most popular compatible tow bar is the Falcon All...
    view full answer...
  • Difference Between Roadmaster Base Plate Kits For 2021 Jeep Wrangler Unlimited
    That's a good question and the only difference between the two Roadmaster base plate kits that fit your 2021 Jeep Wrangler Unlimited are the style of Roadmaster tow bar that connects to them. The Roadmaster Crossbar-Style Base Plate Kit # RM-521453-4 allows you to utilize a Roadmaster crossbar-style tow bar, while the Roadmaster Direct-Connect Base Plate Kit # RM-521453-5 won't allow the use of a tow bar with a crossbar. The direct-connect base plates are also easier to use a tow bar...
    view full answer...
  • Base Plate Kit for 2021 Jeep Wrangler Unlimited for Roadmaster Tow Bar
    Since you have a Roadmaster tow bar already that uses the crossbar setup you'd just need the base plate kit part # RM-521453-4 for the 2021 Wrangler JL and you'd be set. If you don't have lighting already you could use the part # RM-15247 as well.
    view full answer...
  • Does Roadmaster Base Plate Kit for 2018 Jeep Wrangler Unlimited Fit with Winch Built In
    The Roadmaster base plate kit part # RM-521453-4 does fit your 2018 Jeep JL Wrangler Unlimited that has the factory steel bumper with the winch built into it.
    view full answer...
  • Roadmaster Crossbar-Style Vs. Direct-Connect Base Plate Kits for 2021 Jeep Wrangler Unlimited
    The biggest difference between the Roadmaster Crossbar-Style Base Plate Kit # RM-521453-4 and the Roadmaster Direct-Connect Base Plate Kit # RM-521453-5 for your 2021 Jeep Wrangler Unlimited is going to be the style of tow bar that you can use. The Crossbar-Style Base Plate Kit # RM-521453-4 will allow you to use a tow bar like the etrailer SD Non-Binding Tow Bar for Roadmaster Crossbar-Style Base Plates # e44ZR. The Direct-Connect Base Plate Kit # RM-521453-5 will allow you to use a tow...
    view full answer...

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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Lindsey S
Edited by:
Lindsey S
Employee Jacob T
Video Edited:
Jacob T
Employee Chris R
Video by:
Chris R
Employee Jonathan Y
Video by:
Jonathan Y
Employee Shane H
Test Fit:
Shane H
Employee David F
Test Fit:
David F
Employee Clayton O
Test Fit:
Clayton O
Employee Mike S
Written by:
Mike S
Employee Isabelle B
Updated by:
Isabelle B

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