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Roadmaster Crossbar-Style Base Plate Kit - Removable Arms

Roadmaster Crossbar-Style Base Plate Kit - Removable Arms

Item # RM-521450-4
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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 800-298-8924 to order Roadmaster base plates part number RM-521450-4 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 (364)
  • Q & A (15)
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Roadmaster Base Plates - RM-521450-4

  • Roadmaster
  • Removable Drawbars
  • 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
  • Compatible with Quick Disconnects and all Roadmaster tow bars
  • 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.



521450-4 Road Master EZ4 Base Plate Kit



RM-521450-4 Installation InstructionsInstallation Details RM-521450-4 Installation instructions

This Product Fits The Following Vehicles

2018 - 2018 Jeep JL Wrangler with factory plastic bumper

2018 - 2018 Jeep JL Wrangler Unlimited with factory plastic bumper

2019 - 2019 Jeep Wrangler with factory plastic bumper

2019 - 2019 Jeep Wrangler Unlimited with factory plastic bumper





Customer Reviews

Roadmaster Crossbar-Style Base Plate Kit - Removable Arms - RM-521450-4

Average Customer Rating:  4.8 out of 5 stars   (364 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-521450-4
by:
2019 Jeep Wrangler

Excellent product, installed like a dre am. 715376



- RM-521450-4
by:
2019 Jeep Wrangler

Install took about 45 mins Haven’t used the trailer yet YouTube video helped 696586



- RM-521450-4
by:
Jeep

Ordered the Roadmaster baseplate for my new Jeep and it not only arrived on time but a day early. Given we are going on vacation Friday that gives me a full extra day to install. Thanks for the quick turnaround on my order. 686609



- RM-521450-4
by:

Will write a review when installed, as far as the order it was easy and delivered quickly. 673162



- RM-521450-4
by:

Good product. Fit as explained. 663103



- RM-521450-4
by:

Sal looked up my file and matched the tow plated to my toe bar I bought from them several years back. Service is great. I had my parts by noon two days later. I have ordered parts for 8 years and never was disappointed. Thanks Etrailer andsalesman Sal. 549773



- RM-521424-4
by:

Review from a similar Roadmaster EZ4 in Base Plates


great fit easy install .Best service ev er. 557727



- RM-521451-4
by:

Review from a similar Roadmaster EZ4 in Base Plates


This is the adapter kit i needed for my 2019 Jeep Cherokee to flat tow it behind my Class A Motorhome. At the time I first ordered this kit the factory still had to finish the design process as we had purchased the Jeep when it came out in 2018. It took about 6 weeks for the factory to call me to say it was done and could be ordered. My RV mechanic installed it and it went very well according to him. I towed the Jeep this weekend and it worked flawlessly. It replaces the tow hooks on the front of the Jeep. Everything arrived very quickly and in perfect order from etrailer. 694234



- RM-521451-4
by:

Review from a similar Roadmaster EZ4 in Base Plates


Amazing how much bulk there is to this base compared to the base I used on my Pickup truck. Going to get them mounted on the new vehicle and give them a test soon 572894



- RM-521440-4
by:

Review from a similar Roadmaster EZ4 in Base Plates


The Base Plates are performing as expected, unfortunately chipping paint has plagued these Base Plates. This chipping paint has occurred along both of the leading edge of where the tow bar mounts. This has not been caused from abuse/misuse, it started happening soon after began using. Should not have happened so soon. 710582



- RM-522014-4
by:

Review from a similar Roadmaster EZ4 in Base Plates


good product....light bracket did not fit bracket... and slots in bottom that fits tocar was not quite right 177107



- RM-524443-4
by:

Review from a similar Roadmaster EZ4 in Base Plates


Installed it myself on a 2017 Ford Focus. Watched a few videos on how to pull front bumper and install mount. The hardest part was making the holes in the steel front bumper. I like the fact I can remove the outside mounts that the hitch mounts to. I’ve pulled the car about 5,000 miles behind the rv with no problems. 698216



- RM-522014-4
by:

Review from a similar Roadmaster EZ4 in Base Plates


2014 FIAT 500L Trekking. Shipping was pretty good... received product in 9 days. Kit includes removable arms. Good Instructions. We had never installed anything requiring body removal. Overall the installation took us 4 hrs. Someone familiar with bodywork could shave an hour or 2 off the job. We took some time carefully working the base plate around the AC tubing. Overall it was easier to install than I expected and looks great. 186478


Comments
We have towed the FIAT 10K miles with no problems. Working good for us.
Lloyd - 04/19/2016

17506

- RM-521423-4
by:

Review from a similar Roadmaster EZ4 in Base Plates


Exactly what I needed when I really didn’t know what I needed. Erica was the rep that helped me get the right parts I needed for my Jeep. Thanks Erica. 490257


Comments
Works like a charm. We have had no problems with the plates. Very pleased with the product. Well worth the money.
Richard - 03/28/2019

51129

- RM-521448-4
by:

Review from a similar Roadmaster EZ4 in Base Plates


I purchased this EZ4 base plate to work in conjunction with the Falcon2 tow bar. It fit perfectly on my Wrangler Unlimited, and is tucked mostly out of site when not used. The two baseplate arms bolted to the cross bar of the Falcon2 are easily removed and stored away when not in use. Installation because of the weight and tight fit to the Wrangler frame, was found to be much easier with two people. 554274



- RM-523182-4
by:

Review from a similar Roadmaster EZ4 in Base Plates


Great product with good directions to peel back the "plastic" front end parts to reach where they mount. Plus etrailer staff backup to answer any questions that may come up. 429596



- RM-521448-4
by:

Review from a similar Roadmaster EZ4 in Base Plates


Great product for my 2014 Wrangler. Good materials, solid attachment to vehicle, and looks good. The e trailer installation video was great for assisting installation. Made the install much quicker and easier. The most difficult procedure for me was disconnecting the wiring harness on the back of the bumper. An old tack puller (or tool of similar design) would have been great for leveraging the pins out of their holes. Cutting the air dam was a slow process to ensure I didn't cut too much. A paper template to mark where to cut the air dam would make this process much simpler. Again, I can't emphasize enough how great the installation video was for making the steps easier. 126011


Comments
This item works great. Have towed about 4500 miles using it. I couldnt be happier with the results.
Bob T - 04/20/2015

10963

- RM-523182-4
by:

Review from a similar Roadmaster EZ4 in Base Plates


Bought the base plate for my new 2016 GMC Canyon. Installed it myself, went real well. 316743


Comments
Great, no issues
Wayne R - 11/15/2017

30937

- RM-521423-4
by:

Review from a similar Roadmaster EZ4 in Base Plates


Very Happy! The shipping was fast; 3 days, including Thanks Giving. I was able to instal the base plat myself, just following the installation video on their web site. I watched it a couple of times while I was waiting for delivery, and then followed it step by step during installation. I wouldn't have dared attempt it myself without the video. I also installed the Tail Light Wiring Kit with Bulbs-RM-155 using the same method. Everything went without a problem. I will be buying from eTrailer again. 588968



- RM-521448-4
by:

Review from a similar Roadmaster EZ4 in Base Plates


All was delivered and I have installed it. Only thing wrong with the RM-521448-4 Roadmaster Crossbar-Style base plate kit was that one of the 1-*1/2" x 3"threaded backing plate would not tighten down. Had to toss it and put in heavy duty washer and Nut and tighten it down. Otherwise great product and easy to install. 658514



- RM-521567-4
by:

Review from a similar Roadmaster EZ4 in Base Plates


I received the RM-521567-4 very quickly with free shipping. I watched the Base Plate Kit video several times before I started the install. I Drove my CR-V upon a set of ramps and started tearing the front end off. Actually it was easier than I thought after watching and listing to the video. The only hard part was drilling the 1/2 inch hole in the sub-frame of the car. I did not have to trim the vertical frame bolts off as shown in the video in my 2013 CR-V. It took me 5 hours to install the Kit on my Honda. I have installed the base plate kit on my 2 previous TOADS, but I think If you can use a few tools this is not a very difficult job. Watch the video for taking the fascia and grill off it's a little tricky, but it snaps right off and back on just like the video. Pay attention where the plastic trim clips go back in the front and fender well. This new version (-4) with the twist on and off base plates is better than the older version (-1) I had before. It is much easier to put on and off the car for towing. My CR-V is black so with the plates off you can barely see the receivers. Great product! 207980



- RM-521448-4
by:

Review from a similar Roadmaster EZ4 in Base Plates


I’ve towed my Jeep Wrangler, using this base plate and Roadmaster Falcon 2 tow bar, over 5000 miles and it has performed flawlessly. 572901



- RM-523182-4
by:

Review from a similar Roadmaster EZ4 in Base Plates


This was my 4th install of a RM base plate. Armed with several variants of written and video instructions we carefully started disassembling a new truck... Like the others base plates, everything fit. I have a 2018 GMC Canyon Denali 4x4 and the instructions were for a Chevy Colorado/Canyon/ZR2 and were off a bit. The GMC Denali install seems to be closer to the Chevy ZR2. In a few cases the trim fasteners and locations differed but all in all, reasonably similiar. Some differences: I did not have to remove the air dam. The fascia was notched at the bottom. Criticism: The width of vertical receiver plate introduced a gap between the 45 degree bumper core end brace and the truck frame. I might weld or bolt a shim to compensate. 579349



- RM-523182-4
by:

Review from a similar Roadmaster EZ4 in Base Plates


I have ordered many products from etrailer and their customer service is 12 on a scale of 1 to 10. I ordered my products on the weekend and they were delivered on a Wed. I also later found cheaper prices on a few of the items and submitted the info for the 110% lower price guarantee and received the refund within a few hours. These folks are just plain great! 450640



- RM-523160-4
by:

Review from a similar Roadmaster EZ4 in Base Plates


Received product in very quickly. My son & I installed it on 2015 Equinox only took about 2 & a half hour with no problems. Great directions & videos. 474667


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Show More Reviews

Ask the Experts about this Roadmaster Base Plates

  • Recommended Parts Needed to Flat Tow a 2018 Jeep Wrangler JL or JL Unlimited
    For your 2018 Jeep Wrangler JL, I recommend starting with the Roadmaster EZ5 Base Plate Kit # RM-521450-4. This kit has removable arms to give you a very clean look when not flat towing your Jeep, and also gives you a clean connection to your tow bar when towing behind your motorhome. I recommend installing this base plate using Loctite threadlocker # LT37420 to keep your hardware from vibrating loose over time. For your tow bar, I recommend the Roadmaster Nighthawk All Terrain, Non-Binding...
    view full answer...
  • Difference Between Roadmaster EZ4 and EZ5 Base Plate Kits for 2019 Jeep Wrangler Unlimited
    The main difference between the EZ4, part # RM-521450-4, and EZ5 base plate kits is how they connect to the tow bar. The EZ4 kit uses Roadmaster's Quick Disconnects that are included with a lot of their tow bars. The EZ5 kit doesn't use the Quick Disconnects but uses pins and clips and clips instead. The tow bar's crossbar is used with the Quick Disconnects of the EZ4 but with the EZ5 the lugs of the tow bar fit directly into the base plate brackets. Take a look at the picture I attached...
    view full answer...
  • Parts Needed to Flat Tow a 2019 Jeep Wrangler Behind a Motorhome
    For your 2019 Jeep Wrangler and Falcon 5250 tow bar you will just need to add base plates, safety cables, lighting, and supplemental braking as the other main components for flat towing. For base plates you can use # RM-521450-4. These are custom fit base plates for your 2019 Wrangler and fit models with the standard factory front bumper. These base plates are also compatible with Roadmaster Quick Disconnects and all Roadmaster tow bars. I have included a link to the installation instructions...
    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-521450-4 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...
  • Base Plates for a 2019 Jeep Wrangler Unlimited JL with ACC
    For your 2019 Jeep Wrangler Unlimited JL with the adaptive cruise control (ACC) you can use the Roadmaster EZ4 Base Plate Kit part # RM-521450-4 which is a confirmed fit. If you have a Blue OX tow bar then you can still use it with this base plate kit but you will also need the Roadmaster Tow Bar Adapter part # RM-032. The issue with ACC is in regards to the location of the sensors/brackets which Roadmaster has deemed is not an issue while using the above base plate kit.
    view full answer...
  • Demco Tabless Base Plate Compatability with Roadmaster Nighthawk Tow Bar for 2019 Jeep Wrangler
    The Roadmaster Nighthawk All Terrain, Non-Binding Tow Bar w/ LED Lights - RV Mount - 8K # RM-676 is compatible with the Demco Tabless Base Plate Kit - Removable Arms # DM9519336. There is no additional adapter needed. I confirmed this with my tech contact at Demco.
    view full answer...
  • What is Difference Between EZ5 and EZ4 Roadmaster Base Plate Kits for 2019 Jeep Wrangler
    For your 2019 Jeep Wrangler the EZ5 kit part # RM-521450-5 is a fit and what makes it unique to the EZ4 part # RM-521450-4 is that the EZ5 does not require you to use the crossbar that comes with Roadmaster tow bars like the Falcon 2 part # RM-520. The kit attaches directly to the tow bar whereas with the EZ4 you have to use the crossbar. Not having to use the crossbar makes connecting and disconnecting a bit more easy, but the trade-off is that you can't use a Rock Guard like the #...
    view full answer...
  • How Long Does It Take To Install Roadmaster Base Plates on a Jeep Wrangler
    The manufacturer, Roadmaster, does not provide an install time or even a range for that matter of their base plate kits such as the Roadmaster Crossbar-Style Base Plate Kit part # RM-521450-4 because there are just too many variables involved. That said, when we schedule installs for a set of base plates we generally allot around 4-6 hours in order to do so. The process for your Jeep Wrangler is a bit easier than most so I would say 4 hours give or take is a good estimate. If you are...
    view full answer...
  • Recommended Complete Flat Tow System for 2017 Jeep Wrangler Unlimited
    For your 2017 Jeep Wrangler Unlimited, I recommend starting with the Roadmaster Crossbar-Style Base Plate Kit - Removable Arms # RM-521450-4. This kit has removable arms to give you a very clean look when not flat towing your Jeep and also gives you a clean connection to your tow bar when towing behind your motorhome. I recommend installing this base plate using Loctite threadlocker # LT37420 to keep your hardware from vibrating loose over time. For your tow bar, I recommend the Roadmaster...
    view full answer...
  • Mounting Location for Breakaway Switch on Roadmaster EZ4 Base Plates for 2018 Jeep JL Wrangler
    The Roadmaster EZ4 Base Plate Kit # RM-521450-4 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...
  • 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-521450-4 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...
  • 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-521450-4 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...
  • Base Plate Kit From Roadmaster that Fits 2018 Rubicon JL Unlimited Wrangler
    I checked with Roadmaster and they have their Roadmaster EZ4 base plate kit part # RM-521450-4 as a confirmed fit for your 2018 Jeep Wrangler Unlimited Rubicon which will work great with your Roadmaster Falcon tow bart # RM-520. This base plate will require you use the crossbar that comes with the tow bar, but if you prefer a direct attachment the EZ5 part # RM-521450-5 will also work. For lighting you can use the diode kit, # RM-15267, and not have to worry about cutting into the taillight...
    view full answer...
  • Roadmaster Crossbar-Style Base Plate Compatible with 2018 Jeep Wrangler
    The Roadmaster Crossbar-Style Base Plate Kit - Removable Arms # 1430-1 is not a fit for your 2018 Jeep Wrangler. You instead will want the Roadmaster Crossbar-Style Base Plate Kit - Removable Arms # RM-521448-4. This is a fit for standard factory bumper applications and is not compatible with the Hard Rock, Winter or 75th Anniversary models. This is a fit for the JK versions. If you have the JL version, then you will instead use the Roadmaster Crossbar-Style Base Plate Kit - Removable...
    view full answer...
  • Is Crossbar Required to Use Roadmaster Nighthawk Tow Bar w/Roadmaster Base Plates on 2018 Wrangler
    The crossbar, # 910021-00, is not required when using the Nighthawk tow bar, # RM-676, with MX, MS, or EZ5 model base plates. So if your 2018 Jeep Wrangler is the new JL model and you are using base plates EZ5 OR if it is a JK model and you are using # RM-521448-5 or # 1444-3 then you will be good to go without the crossbar. Any other model, EZ, EZ2, EZ4 or XL, and the crossbar is required. The EZ5 for the 2018 JL was discontinued, so you will need to use the crossbar and baseplates...
    view full answer...

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Info for this part was:

Edited by:
Lindsey S
Expert Research:
Jameson C
Video Edited:
Chris R
Written by:
Ronnie R
Updated by:
Mike S
Updated by:
Isabelle B

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