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Blue Ox Tow Bar to Roadmaster EZ5, MS, and MX Base Plates Adapter Brackets

Blue Ox Tow Bar to Roadmaster EZ5, MS, and MX Base Plates Adapter Brackets

Item # BX88185
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Shipping Weight: 3 lbs
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Use your Blue Ox tow bar with Roadmaster base plates. Works with EZ5, MS, and MX series base plates. 1-636-306-4830 to order Blue Ox accessories and parts part number BX88185 or order online at Free expert support on all Blue Ox products. Guaranteed Lowest Price and Fastest Shipping for Blue Ox Tow Bar to Roadmaster EZ5, MS, and MX Base Plates Adapter Brackets. Accessories and Parts reviews from real customers.
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  • Reviews (20)
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  • Videos (2)
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Blue Ox Accessories and Parts - BX88185

  • Base Plates
  • Tow Bar
  • Adapters
  • Blue Ox to Roadmaster
  • Blue Ox

Use your Blue Ox tow bar with Roadmaster base plates. Works with EZ5, MS, and MX series base plates.


  • Fits Roadmaster base plates
    • EZ5, MS, and MX base-plate models
  • Works with Blue Ox motor-home-mounted tow bars
    • Can also be used on the Blue Ox Acclaim car-mounted tow bar (BX4330) if the space between your base plates is 23" to 30"
  • Simple installation
    • Brackets replace lug-style brackets on arms of tow bars
    • Use RM-910029 pins (sold separately) as the pins from your tow bar are too small
  • Includes 2 adapter brackets
  • Made in the USA
  • 1-Year warranty

BX88185 Blue Ox Tow Bar to Roadmaster Bracket Adapter - No Crossbar

Installation Details BX88185 Installation instructions

Video of Blue Ox Tow Bar to Roadmaster EZ5, MS, and MX Base Plates Adapter Brackets

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Blue Ox Tow Bar Base Plates Adapter Brackets Review

Rob: Hey everybody. Rob here at, and today we're going to be taking a look at the Blue Ox tow bar with the Roadmaster base plate adapter.Now, there could be a few different reasons why you need an adapter. Maybe you have a Blue Ox tow bar from your old setup, you got a new vehicle and you have to have a Roadmaster base plate. Well, there's no reason to go out and buy a new tow bar if your one is in good working condition. Buying an adapter is going to be a lot more cost effective, again, rather than having to replace a lot of big components.Now our adapter is going to be made to work with Roadmaster MS, MX and EZ5 or direct connect base plates. It's also going to work with Blue Ox motor home-mounted tow bars.

What that means is that the tow bar is going to slide directly into the receiver tube, and not have any kind of coupler or extra connecting point.Now, you do need to keep in mind that the pins that are going to be securing our tow bar to our base plate do not come with the adapter. And the pins from your Blue Ox tow bar are going to be too small to fit through the base plate. So you may want to pick up a set of replacement pins. You'll get two pins that clip to secure everything down, along with four washers to take up some of that space and cut down on the rattling noise here.Now, as far as the installation of our adapter goes, it's an extremely straightforward process, and really, all you're going to need is a three quarter inch wrench and socket. In fact, let's go ahead and go through the process together.Putting your adapter in place is going to be extremely easy.

To begin our installation, I do want to start out saying we already have one in place, and we'll go ahead and put this one on together.In your kit, you're going to have two adapters, two hex bolts, two lock nuts, and eight washers. Now, each one of our adapters is going to get four washers, one nut, one bolt, and the adapter itself. So you want to grab your tow bar. We're going to come to the very end, where the factory connection point is.Now, we're going to have a bolt going through it that's actually attaching this piece on. So you want to grab yourself a three quarter inch socket and wrench to hold the nut on the bottom and use the socket to turn the bolt on top.Once the nut's loose, you can pull the bolt out.

There are going to be some nylon washers in there, so you want to make sure those come out as well. We can set these aside and simply grab our new adapter. We're going to take two washers, we're going to line them up, put them on the bottom. We'll slide our adapter over.I want to put two more washers in between the top section and then we'll take our bolt and we can pass it through. And it maybe a little difficult to get all of these washers to line up.

So if you have a screwdriver or a pen, or really anything that's going to be skinny enough so you can just kind of move the washers to where they're going to line up in place, and we can get the bolt to go through all of them.Once you have the bolt going through, we can grab our new lock nut. Loosely get it in place for now, and we'll use that same three quarter inch wrench and socket and we're going to snug it up. But when you do tighten this, you want to make sure that the bolt comes through the nut, but you don't want it on there so tight that it doesn't move. You still want to be able to pivot that adapter.And we see we have a couple threads coming through, so we know it's nice and secure. And then the other arm's going to be the exact same process. So just put the other one on, and you're ready to hook up to your motor home.And hooking up your tow bar to your base plate's going to be a really easy process. We'll simply slide the arm into place, and you may notice there's a little bit of slop there. Well, we have some nylon bushings or washers that we're going to use, but keep in mind these don't come with the adapter. They're going to come with a replacement pin. And again, it's just to take up some of that extra space.So we'll slide the washer over our pin before it goes through our adapter, and then on the other side before it goes through our base plate, slide another washer in place, make sure our holes line up. We take our pin and clip and secure everything down.Again, I'm Rob here at, and that'll finish up your look at the Blue Ox tow bar to Roadmaster base plate adapter.

Customer Reviews

Blue Ox Tow Bar to Roadmaster EZ5, MS, and MX Base Plates Adapter Brackets - BX88185

Average Customer Rating:  4.9 out of 5 stars   (20 Customer Reviews)

Use your Blue Ox tow bar with Roadmaster base plates. Works with EZ5, MS, and MX series base plates.


These were exactly what I needed. I changed tow vehicles to a Honda HRV (manual) and the only base plate available was the Roadmaster. These adapters took about 10 minutes to change my Blue Ox tow bar to accept the Roadmaster.


Dealing with etrailer was good experience that includes timely, good prices, good salesperson and great installation. Thanks, when I need something else etrailer will be my first choice. I tell everyone to go to etrailer but most have never of etrailer.


Needed this adapter to connect my blue ox tow bar to the roadmaster base plate on the car. The adapter was in stock and shipped quickly to meet my needs.


Thanks guys, great delivery time. Great price.


This product saved me time and money by not having to make an adaptor from my Blue Ox tow bar to Roadmaster base.


I called, and got the right information. Later on that day I ordered online and everything came on time.
The mount, and the wiring kit fit exactly as expected.
I bought several items over the years and I highly recommend etrailer.


All the products I ordered from etrailer,fit and worked excellent for me to be able to flat tow my 2015 Chevrolet Colorado behind our motorhome. I live in Canada and fast delivery on the products I ordered. I will order from etrailer again


I JUST GOT HOME AND FOUND MY ORDER FROM ETRAILER WAITING FOR ME ON MY PORCH. I have not as of yet tried to install it, but everything I will need for installation was included. I will comment later on as to how the installation went. Thank you etrailer for your fast response and delivery.


Etrailer originally told me that they could not help me with an adapter I needed. They did not give up the following day Bob the shop supervisor called me and said he had taken another look and had figured out what I needed. They shipped the part the same day.
Great service. I will be a repeat customer.


Great product. Worked perfect. Didn't realize that it didn't come with the pins (my fault) and the pins I had were too small. Had to order correct pins and pay additional shipping. The correct pins are 3/4" diameter so if yours are smaller than that, order the right ones with the kit to avoid additional shipping charges.....just FYI.


Excellent Quality. etrailer Lisa D the best customer service.

God bless,



The kit was easy to install and simple to hook up to my jeep awesome product thanks


Everything fits great. Thanks

how wide are they ?
-- comment by: mark d - 10/12/2013


Product works great and Angie K is an absolutely wonderful person to work with, very knowledgeable and keeps up with your order and keeps you informed.
Again it was a pleasure working with a knowledgeable person .


Very good -Service excellent !


Came on time fit fine


Great website, easy to use and you have everything I need.


thank you got it on time and well call again thanks


Arrived Quickly and does the job!


Delivered as ordered.


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Info for this part was:

Employee Lindsey S
Written by:
Lindsey S
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
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Adam R
Employee Jeff D
Installed by:
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Employee Chris R
Video Edited:
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Employee Wilson B
Updated by:
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Employee Jonathan Y
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Employee Robert C
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