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  1. Tow Bar Base Plate
  2. Roadmaster
  3. Removable Draw Bars
  4. Twist Lock Attachment
  5. Partially Hidden
Roadmaster Crossbar-Style Base Plate Kit - Removable Arms
Roadmaster

Roadmaster Crossbar-Style Base Plate Kit - Removable Arms

Part Number: RM-521448-4
In Stock
$525.00
Retail:$575.00
You Save: $50.00
Tow Bar Base Plate

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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. Great Prices for the best tow bar base plate from Roadmaster. Roadmaster Crossbar-Style Base Plate Kit - Removable Arms part number RM-521448-4 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Roadmaster Tow Bar Base Plate - RM-521448-4

Highlights

  • Virtually invisible design: Once drawbars are removed, brackets remain hidden and sleek.
  • Quick and easy to attach/remove: Simply twist the arms to lock or unlock them.
  • Robust construction: Computer-cut, all-steel build ensures exceptional strength.
  • Corrosion-resistant finish: Black powder coat for durability against weather.
  • Simple installation: No welding required, fits cleanly onto your vehicle's frame.
  • Versatile use: Compatible with Roadmaster tow bars with a quick-disconnect crossbar.

Features to know about

Seamless Installation and Removal: Removable Arms with Twist Lock Attachment

Installing your tow system shouldn't be a hassle, and with the Roadmaster Crossbar-Style Base Plate Kit, it isn't. The removable arms make attaching and detaching the drawbars a breeze. Simply twist to lock them into place, and when it's time to hit the road, twist them off just as easily. This feature is a game-changer for anyone wanting a convenient setup that doesn't compromise on stability.

Cleaner Aesthetic: Virtually Invisible Hidden Brackets

No one likes clutter disrupting their car’s sleek look. The hidden bracket design of the Roadmaster kit ensures that once the drawbars are off, the brackets are practically invisible. They sit far back within your vehicle’s grille, maintaining your car’s clean lines and aesthetics. Enjoy a polished, unobtrusive appearance without needing to compromise on functionality.

Tailored Fitment, Every Time: Custom Base Plate Design

There’s no one-size-fits-all approach here. The Roadmaster Crossbar-Style Base Plate Kit is custom-designed to ensure a seamless fit for your specific vehicle. This precise fitment minimizes the need for modifications and ensures you're ready to go without additional adjustments, making it an ideal option for those who want precision engineering without the hassle.

Durability Meets Design: All-Steel Construction with a Black Powder Coat Finish

Concerned about the wear and tear of regular towing? The all-steel construction of the Roadmaster base plate provides exceptional strength and durability. Finished with a black powder coat, this kit is not only resistant to corrosion but also blends seamlessly with your vehicle's undercarriage, offering strength and style in one robust package.

Effortless Towing with Easy Hook-Up: Integrated Mounting Points

Facilitating easy attachments, the integrated mounting points for your electrical connector plug or bracket make hooking up your tow bar less of a chore and more of a routine. By keeping everything in place securely, you can trust that your connections are solid and ready for the road.

American Craftsmanship with Peace of Mind: Made in USA with a Limited Lifetime Warranty

Manufactured in the USA, this Roadmaster kit is a testament to quality craftsmanship and reliable performance. The limited lifetime warranty ensures a commitment to satisfaction and trustworthiness, offering you peace of mind in your investment. This sturdy, well-crafted base plate kit not only meets your towing needs but does so with a promise of enduring reliability.

521448-4 Road Master EZ4 Base Plate Kit

Replaces 1432-1

Installation Details RM-521448-4 Installation instructions

This Product Fits The Following Vehicles



California residents: click here


Customer Satisfaction Score:

Ratings & Reviews

4.8

2071 reviews
5 Stars
(1750)
4 Stars
(244)
3 Stars
(43)
2 Stars
(12)
1 Star
(22)
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.

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deffinetly will use again!



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Quality product and Great service


25
2071
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See what our Experts say about this Roadmaster Tow Bar Base Plate

  • Parts Needed to Flat Tow 2013 Jeep Wrangler Unlimited with Aftermarket Bumper that Has D-rings
    Flat towing a vehicle such as a Jeep Wrangler behind a Class C motorhome such as the Dynamax Force 37BH HD will require a few items including the tow bar and braking system. The Blue Ox Patriot braking system # BLU37TR that you referenced is a very good selection. I linked overview articles on flat towing that cover each of the items needed. These are a good starting point. But first I suggest you check with the bumper maker to confirm it is rated for towing. Not all aftermarket bumpers...
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  • Will a Roadmaster StowMaster Tow Bar Work With a Demco Base Plate on a 2012 Jeep Wrangler?
    The Demco Base Plate # DM9519292 that was installed on your 2012 Jeep Wrangler is going to require a Demco compatible Tow Bar # DM9511012. It is not compatible with your StowMaster Tow Bar # RM-501 as you have to have a Crossbar Style Base Plate # RM-521448-4 for the tow bar to attach.
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  • Adapter to Use Blue Ox Tow Bar With Roadmaster EZ Crossbar-Style Base Plate Kit
    The base plates you have are the Roadmaster Crossbar-Style Base Plate Kit # RM-521448-4, which are the EZ4 model of base plates, so the correct adapter to use a Blue Ox tow bar is the Roadmaster Tow Bar Adapter # RM-032. This will work with Blue Ox Aventa, Aventa II, Aventa LX, Alpha, Ambassador, Kar Bar, Aladdin, Alexxa, and Acclaim tow bars, as well as all Blue Ox A-Frame tow bars with 1 or 3 pronged attachment. I've added links to video reviews for you to check out as well.
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  • Base Plate Kit Recommendation for 2014 Jeep Wrangler 4 dr. Unlimited
    If you have a base plate kit set up on your 2008 Jeep Wrangler you most likely have a flat towing setup already and just need a new base plate kit for the 2014 Wrangler Unlimited. For that you would need the part # RM-521448-4 which is a confirmed fit.
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  • Parts Needed to Flat Tow a 2017 Jeep Wrangler Unlimited Winter Edition
    The base plate kit we carry to fit your 2017 Jeep Wrangler Winter Edition is Blue Ox # BX1133. It's the only kit we offer that fits the Winter Edition. In addition to the base plate kit you'll also need a tow bar, wiring, a supplemental braking system, and likely a high-low adapter. To pair with the Blue Ox base plate kit I recommend the Avail # BX7420 for a tow bar. It has a higher weight capacity than most at 10,000 pounds. Also, the safety cables are included. To power the Jeep's...
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  • Recommended Flat Towing System for 2016 Wrangler JK 2 Door
    I'm happy to help get you everything you need for your 2016 Jeep Wrangler JK to flat tow it. You have done your homework so my recommendations will be in line. I recommend the Roadmaster Crossbar-Style Base Plate Kit - Removable Arms # RM-521448-4 you suggested which will utilize the crossbar of the Roadmaster Sterling All Terrain Tow Bar # RM-576. This is a great combination with the tow bar also having the wiring cord and the safety cables integrated. Then you will use the Hopkins...
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  • Parts Needed to Flat Tow a 2013 Jeep Wrangler Sport or a 2016 Jeep Wrangler Unlimited
    To flat tow your 2013 Jeep Wrangler Sport behind your RV 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. There are a couple of great brands that we carry for all of this equipment and a lot of it depends on what kind of setup you want when it comes to the brand. The 2 dominating brands for the Base Plate and Tow Bar are Blue Ox and Roadmaster. Although they are very similar in quality I prefer...
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  • 2017 Jeep Wrangler Unlimited Base Plate Recommendation for Falcon 2 Tow Bar
    You'll need a new base plate kit for your 2017 Jeep Wrangler Unlimited Sahara as the older style on your 2006 Wrangler isn't compatible with your newer vehicle. There are 2 style choices we have for your 2017 model that will also work with your Roadmaster Falcon 2 Tow Bar # RM-520: - Direct-Connect # RM-521448-5 - Crossbar-Style # RM-521448-4 I prefer the Direct-Connect style because it's less weight you have to deal with and the connection is a little easier to make. Since you already...
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  • Can Blue Ox Rangefinder II Tow Bar Be Used to Flat Tow a 2016 Jeep Wrangler
    Your Rangefinder II Tow Bar BX4322 has a unique attachment system and the only adapter kit we have to match it are the Roadmaster Base Plates Adapters # RM-037. The adapters aren't compatible with the etrailer Invisible Base Plate Kit # e98949 you're looking at, but they are compatible with the Roadmaster Crossbar-Style Base Plate Kit # RM-521448-4. So in order to continue using your older tow bar you'll need the Adapters # RM-037 and Roadmaster Base Plates # RM-521448-4.
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  • What Aftermarket Jeep JK Bumpers Are Compatible with Roadmaster Base Plate Kits
    When the Roadmaster # RM-521448-4 base plates are designed, they're designed to work with the standard factory bumper only. Due to the myriad of aftermarket bumpers available for the Jeep Wrangler JK platform, it'd be near impossible for Roadaster to test fit with all of them. The only aftermarket bumper Roadmaster mentions that's compatible with their base plates is the Warn Elite 101420 which is compatible with the # RM42FR direct connect base plate or the # RM92FR crossbar-style base...
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  • Roadmaster Crossbar-Style Base Plate Compatible with 2018 Jeep Wrangler JK
    We do have the correct baseplate kit but 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. I confirmed this with Roadmaster.
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  • Recommended Base Plates Compatible with Roadmaster Tow Bar on 2016 Jeep Wrangler Sport
    As long as your 2016 Jeep Wrangler Sport has the standard front bumper then either the Roadmaster EZ4 # RM-521448-4 or EZ5 # RM-521448-5 will work with your Roadmaster All Terrain tow bar.
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  • Recommended Roadmaster Base Plate Kit for 2017 Jeep Wrangler
    The Roadmaster Base Plate Kit, # 1444-3 is a great option for a direct-connect base plate. These direct-connect brackets install onto your Jeep Wrangler's frame to provide attachment points for a motor-home-mounted tow bar. What type Roadmaster tow-bar you have needs to be identified for accurate recommendation. If it is a crossbar type, I suggest the Roadmaster Crossbar-Style Base Plate Kit, # RM-521448-4. In addition you will need supplemental braking and a wiring solution for your...
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  • What Base Plates Work with Roadmaster Tow Bar # RM-501
    The Roadmaster base plate kits are designed to be used with the Roadmaster tow bar part # RM-501 that you referenced. I believe you have a 2017 Jeep Wrangler so for that the easiest solution is the # RM-521448-4 which I attached an install video for.
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  • Recommended Supplemental Braking System for Flat Towing 2015 Jeep Wrangler
    A Tow Bar and Braking System like the Ready Brute Elite combines a tow bar with a built-in supplemental braking system. The Ready Brute Elite braking system activates the brakes on your towed vehicle when your RV stops or slows. Basically the braking force of your RV works in combination with the forward surge of your towed vehicle to make it slow down and stop - like a surge brake trailer coupler. Instead I would recommend a proportional braking system like the Roadmaster tow bar braking...
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  • List of Parts Needed to Flat Tow a 2017 Jeep Wrangler Unlimited Behind an RV
    There are several items needed to flat tow your 2017 Jeep Wrangler Unlimited behind an RV: base plates, a tow bar, safety cables, lighting, and supplemental braking. For base plates you can use the Roadmaster base plates # RM-521448-4. Please note the base plates do not fit Hard Rock or 75th Anniversary models. I have linked a video showing an example installation for you. For a compatible tow bar you can use the popular Falcon 2, # RM-520. I have linked a video review of this tow bar...
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  • Roadmaster Base Plate Kit that Fits 2016 Jeep Wrangler and Roadmaster StowMaster 5000
    The correct Roadmaster base plate kit that fits your 2016 Jeep Wrangler Unlimited and your Roadmaster Stowmaster # RM-501 would be the part # RM-521448-4. If you send me a picture of the base plate kit you have now there's a chance I would be able to identify it. Or even better would be if you could find a part number on it and give me that.
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  • Can The Arms On The Roadmaster Crossbar-Style Base Plate Kit Be Replaced With Direct Connect Arms
    I confirmed with Roadmaster that you will be able to replace the arms of your Roadmaster Crossbar-Style Base Plate Kit - Removable Arms # RM-521448-4 with the arms of the Roadmaster Direct-Connect Base Plate Kit - Removable Arms # RM-521448-5. You'll need to fill out the form located on the # RM-ARMS page listed as "Installation Details" and send it into Roadmaster. The arms you're wanting to order are the C002383. As for the tow bar I recommend the Roadmaster Falcon All Terrain, Non-Binding...
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  • What Trimming Is Needed On A 2010 Jeep Wrangler Rubicon For Fit Of The Roadmaster EZ4 Base Plate Kit
    The Roadmaster EZ4 Base Plate Kit, # RM-521448-4, comes with the same instructions that Roadmaster has on there web site. There is no template or measurements given. What you need to do is after the brackets are installed you will hold the rock guard up to the vehicle and mark on the rock guard what you will need to trim to clear the brackets. In the base plate kit instructions on page 6, the figure Q picture shows with yellow lines where the trimming should be done. I am sending a...
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  • Base Plates and Parts Needed to Flat Tow for 2016 Jeep Wrangler With BlackHawk All-Terrain Tow Bar
    Assuming your 2016 Jeep Wrangler is not the Backcountry, Hard Rock, or 75th Anniversary model and you have the standard factory bumper, the Roadmaster EZ4 Base Plate Kit # RM-521448-4 will fit your car as well as all Roadmaster tow bars including your BlackHawk All-Terrain and BlackHawk 2 All-Terrain # RM-422. Along with the base plates and tow bar there are a number of parts you're going to need in order to flat tow your '16 Wrangler including you will also need safety chains # RM-643....
    view full answer...
  • Crossbar Style Base Plate For Flat Towing A 2011 Jeep Wrangler With Standard Bumper
    We have what you need. The Roadmaster Crossbar-Style Base Plate Kit - Removable Arms # RM-521448-4 will work with the etrailer XHD Non-Binding Tow Bar for Roadmaster Crossbar Base Plates - 2" RV Mount - 10,500 lbs # e64ZR. You will also need a few more items to complete the set up. I will list them out for you. You need the Demco Stay-IN-Play DUO Supplemental Braking System w/ Wireless Coachlink Monitor - Proportional # DM86VR. This will keep you safe and legal. You need to sync your...
    view full answer...
  • Parts Needed to Flat Tow a 2012 Jeep Wrangler Sport Behind a Motor Home
    I will be happy to help. For your 2012 Jeep Wrangler Sport, if it does NOT have any aftermarket bumper, winch, or grille guard/bull bar then you can use # RM-521448-4 for base plates. I have included a link to the installation instructions for you. If the Jeep does have an aftermarket bumper let me know the manufacturer and model and I can determine if there is a fit. If you have a regular bumper but a winch or grille guard or bull bar then those items would have to be removed. For a compatible...
    view full answer...
  • Base Plate Recommendation for Using Roadmaster Blackhawk Tow Bar on 2015 Jeep Wrangler Unlimited
    We offer two Roadmaster Base Plate Kits for your 2015 Jeep Wrangler Unlimited and both can be seen using the link provided at right. These two base plates, EZ5 kit # RM-521448-5 and EZ4 kit # RM-521448-4, share removable twist-lock draw bars and both are excluded from use on the 10th Anniversary Rubicon or Call of Duty editions. I checked with my technical contact at Roadmaster regarding compatibility with your original Blackhawk tow bar. For this tow bar you can use either of these base...
    view full answer...
  • Rock Guard Trimming Instructions For A Roadmaster Baseplate Kit On A 2017 Jeep Wrangler
    I've attached a link to the installation instructions for the Roadmaster Crossbar-Style Base Plate Kit # RM-521448-4 below as well as a snippet from the instructions going over trimming the rock guard. I've also attached one of our installation videos below where Rob will go through the trimming process starting around the 8 minute mark.
    view full answer...
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