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Replacement Quick Disconnect Crossbar Assembly for Roadmaster Motorhome Mounted Tow Bars

Replacement Quick Disconnect Crossbar Assembly for Roadmaster Motorhome Mounted Tow Bars

Item # 910021-00
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Roadmaster Accessories and Parts - 910021-00
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Replaces the crossbar and quick-disconnects on Roadmaster motorhome-mounted tow bars featuring QD. Fits Blackhawk 2 All Terrain RM-422, Falcon 2 RM-520, Falcon All Terrain RM-522, Nighthawk All Terain RM-676, and Sterling All Terrain RM-576 tow bars. 1-636-306-4830 to order Roadmaster accessories and parts part number 910021-00 or order online at Free expert support on all Roadmaster products. Guaranteed Lowest Price and Fastest Shipping for Replacement Quick Disconnect Crossbar Assembly for Roadmaster Motorhome Mounted Tow Bars. Accessories and Parts reviews from real customers.
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  • Reviews (149)
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Roadmaster Accessories and Parts - 910021-00

  • Tow Bar
  • Quick Disconnects
  • Car Side and Tow Bar Side
  • Roadmaster

Replaces the crossbar and quick-disconnects on Roadmaster motorhome-mounted tow bars featuring QD. Fits Blackhawk 2 All Terrain RM-422, Falcon 2 RM-520, Falcon All Terrain RM-522, Nighthawk All Terain RM-676, and Sterling All Terrain RM-576 tow bars.


  • Replacement the crossbar and quick-disconnects on your Roadmaster motorhome-mounted tow bar with quick-disconnects
    • Also fits discontinued Falcon 5250, Eagle 8000, Sterling, and Blackhawk tow bars
  • Complete assembly includes quick-disconnect brackets for tow bar and base plates
  • Mounting hardware included


  • Blackhawk 2 All Terrain: RM-422
  • Falcon 2: RM-520
  • Falcon All Terrain: RM-522
  • Nighthawk All Terain: RM-676
  • Sterling All Terrain: RM-576

Note: If you are replacing quick-disconnects on your Sterling All-Terrain tow bar, cable anchor plates (RM-910653 - sold separately) may also be needed.

910021-00 Road Master Quick Disconnect Tow Bar Base Assembly

Video of Replacement Quick Disconnect Crossbar Assembly for Roadmaster Motorhome Mounted Tow Bars

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

Video Transcript for Roadmaster Quick Disconnect Tow Bar Base Assembly Installation - 2012 Fiat 500

Hey everybody. Rob here at Today we're going to be taking a look at the Roadmaster Quick Disconnect Crossbar that goes on to our crossbar style base plate. Now this is going to be a replacement item. So if you've already had a crossbar, maybe you're missing some of the pins, maybe you got damaged. This is going to be a great replacement for that.

But at the same time, if you got a crossbar style base plate, and you're new to towing, depending on what tow bar you picked up, it may or may not come with the crossbar, but it is going to be required if you're using this style base plate. There's a really simple process to get hooked up and use it. We're simply just going to have a couple pins on top, that's going to hold the crossbar to the base plate, and then we'll have some larger pins right here, which are actually going to be the attachment point for our tow bar.Simply just remove the pins. The tow bar will slide in here, and secure it down on each arm like this. And it is a really quick, easy way to disconnect.

We'll have these two pins on top. Once we have our tow bar unhooked, we can remove these pins, lift up on the bar, and easily remove it so that we can get the arms pulled out of our base plate and have a nice clean look on the front of our Fiat.Now the crossbar is going to come with all the brackets and hardware that's going to be mounted onto the tow bar arm itself. And it's extremely easy to put on, just a few bolts on each arm, and getting everything lined up so it goes on smoothly. In fact, let's go and show you how to bolt everything up, and how to get all the settings right. So our quick disconnect is going to come with the bar as well as the brackets to get everything installed.

Now it is going to go on just like the original one, since this is a replacement. So we can go ahead and pull the pins out of the top here.Just lift it open, pull the pin out, and then allow the bracket to come off the back of it. We're going to do that on each side, is we're actually going to be bolting these to our base plate. Now these are labeled, so you want to make sure you grab the correct one from the passenger side of the car, they should grab the passenger side bracket. Then once we have the bracket, we want to grab...

There'll be a little plate with two holes in it, it's going to go right on the front of the bracket and will lineup with the two holes. We're going to grab two of the bolts out of your kit. Go through that plate, and through the bracket, we going to line it up on our base plate. Should hold itself there, just like that. We going to grab a flat washer for each one of the bolts, I'm going to follow that up with a split lock washer.Then finally, we're going to secure it down with a hex nut. Now, at this point, we just want to get them snug, just hand tight. We don't want them to be really tight yet, because we will have to make a few adjustments and we need to be able to slide that bracket left and right, so we can get a nice snug fit with the crossbar. That's going to be the same combination of hardware for the other side. So we'll go ahead and get that in place, and get the other bracket on the driver's side. So now we can grab the actual crossbar itself, and you'll notice on the bottom, we're going to have this kind of a nub sticking out. That's going to fit right into the center hole of each one of the brackets. But then at the same time on the top, we're going to have a hole that the piece is going to come through the top.That's already on the bracket. So that's why we need those adjustments. So we want to line up the hole, but then on the other side, you may have to kind of slide, because you can see ours isn't perfectly lined up. So one side went in, just need to slide that bracket over so we can get it to go in. And then we want to make sure that it's centered on our car as close as we can, and just kind of look and we can adjust it left and right. And once you get your bracket in place, you kind of want to snug these nuts down as best you can. Now obviously, the bolt is probably going to be spinning a little bit on the other side and we don't need it to be extremely tight, but we want it to be snug to where it won't move that much on us.And once we have it nice and snug, you want to test fit the bar, make sure you can easily remove it, and put it back in place. And it's not getting stuck or binding up. Once you're comfortable, abd the bar is going on easily, sliding, coming out, we're going to remove the bar and we're going to fully tighten these bolts. But you do want to be careful not to move that bracket around when you're tightening it up. I'm going to use a 19 millimeter socket and wrench to tighten these up, but you can also use a three quarter inch socket and wrench as well. We use the wrench on the back end to hold the nut in place. We'll go onto the other side and tighten those as well. I want to grab the crossbar again, make sure nothing moved on us and, that the bar could still go into place.You can see ours is a little bit tight, so we may need to loosen those bolts up, make some very, very minor adjustments. But the main goal is that you can easily put the crossbar over the base plate, and take it off easily. We don't want it to bind up kind of like how it's doing now. It's a little bit. One of these probably just needs to move just a little bit. So we're going to loosen those bolts up. Make sure it's nice and easy to put on and take off. Once you have it adjusted, you're going to want to take a torque wrench and torque your hardware down to the specified amount in the instructions. And then make sure you repeat that for all the hardware on both of the brackets. Then you can put your crossbar back on, make sure to put in the retaining pins, and go all the way through that top. Make sure it fully latches onto the pin itself. But again, I'm Rob here at That'll finish up your look at the Roadmaster quick disconnect crossbar on our 2012 Fiat 500.

Customer Reviews

Replacement Quick Disconnect Crossbar Assembly for Roadmaster Motorhome Mounted Tow Bars - 910021-00

Average Customer Rating:  4.9 out of 5 stars   (149 Customer Reviews)

Replaces the crossbar and quick-disconnects on Roadmaster motorhome-mounted tow bars featuring QD. Fits Blackhawk 2 All Terrain RM-422, Falcon 2 RM-520, Falcon All Terrain RM-522, Nighthawk All Terain RM-676, and Sterling All Terrain RM-576 tow bars.


I use this crossbar assembly on my 2015 Honda Fit and actually prefer it over the direct connect assembly. Combined with the Falcon All Terrain tow bar it gives me more disconnect flexibility on uneven ground and gravel. Even with the Falcon, I have had one of the tow arms bind when disconnecting but as long as I can loosen one arm, I can pull the entire crossbar off the TOAD and easily disconnect the second tow arm without much effort. That's a big plus when you have to drop the TOAD quickly to get the coach into a site.


Always a pleasure to deal with eTrailer. Very knowledgeable staff that goes out of their way to help find the right product and answer any questions asked. This is our “go to” company for all products needed for our RV.


The towbar on my 2012 Honda Fit was bent when it collided with my RV tow gear (Honda brakes failed after I disconnected from the RV, but that's another story). I went on line and found the Roadmaster site that asked me to identify my car by year, make, and model. It immediately took me to the exact page that identified the part that I needed. Rather than continue on line, I called the Roadmaster number and immediately spoke to a young lady who took my order and told me it would be delivered the following week. I gave her my mailing address in Key West (a private mail box). After I hung up, I discovered the actual physical address where my RV is located. I called back and was connected with Ashley. I explained that I needed to change the address. She re-took the order and also confirmed the tow bar would be delivered the next week. Sure enough, the tow bar arrived today, on Wednesday of that following week. Great service from Roadmaster, Ashley, and Ashley's partner who first took my order. Many thanks!


Lock washer was missing and some paint scrapped off the crossbar. Box had been damaged.

I am sorry to hear that you are missing the lock washer and have received some scrapes on your crossbar. I have sent your information over to our customer service department for them to help you get this corrected. As for the paint scrapes, we recommend getting some rust-oleum type of paint to cover the scratches to prevent any future corrosion. I have a link for that for your reference below.
-- Etrailer Expert Katrina B - 08/19/2022


I had an item that didn't ship with my order even through the paperwork showed that it shipped. I emailed etrailer customer service and they had a replacement sent that same day. What great service...thanks etrailer


Very east to install


I purchased the Roadmaster Crossbar-Style Base Plate Kit w/ Removable Arms, The Roadmaster Nighthawk Tow Bar, Quick Disconnect Crossbar, Universal Hy-Power Diode Wiring Kit, and Roadmaster Guardian Rock Guard in order to tow my 2020 Ford Raptor behind my Class A. Everything bolted on beautifully and the craftsmanship was fantastic. Ordering from etrailer was easy and the parts arrived within a few days with no problem. I watched numerous [online] videos to learn how to install everything and they saved me a lot of time. Overall, I'm very happy.


Exact replacement.


Delivered quickly...Quality of product great....Instructions OK...need to be updated...(Nothing to do with etrailer)


Great products!!


Easy to set up and can be removed quite easily


You can't go wrong with Roadmaster parts, and the best place to purchase them is When I need to outfit any of my vehicles, they have a recommendation, and they have NEVER steered me wrong.


Your sales representative was great his name is Brent J I have opened up the box and the parts look to be in really good condition and complete. I have yet to install the parts I will be doing that today. I’ll be more than happy to fill out the form to let you know how it pulls and how easy the connections were. Thank you for yawls prompt service. I never expected it to get to me so quickly and that’s a great thing. I will be ordering more parts from Brent he has a sent me a list Of options that will fit on my Winnebago for suspension and air ride.


Very high quality and fits perfectly.


Complete quick disconnect tow bar system. Easy install. The baseplate install calls for red thread locker. This does not. I decided to use blue for additional safety margin.


Easy install and removal. Heavy duty and well made.

Working great after more than 7,000 miles towing.
Mark - 02/22/2022


Roadmaster quality. Easy assembly. I’m sure it will hold up for many years. Etrailer’s shipping is fast, and the communication is great!


Etrailer and it's employees has gone above and beyond with every order I have made with them.


Everything I ordered was exceptional. I have used a different brand for years but this is so much better. Thanks


Wow - I could not be happier with the items I ordered from and specifically their salesman, Geoffrey.
We got a new car and the old tow bar we had been using needed some extra parts to make the new car towable, so I went online and found them here. I called and Geoffrey took my order and then let know that some of the parts were not in stock. at that time I chose not to order them and I tried to get them elsewhere.
The other online seller took my order and then gave me so much runaround that I cancelled my order with them and called Geoff back and he let me know that the parts I needed were now in stock.
He knew that we had a deadline to make for getting the parts and he even made sure that the order went out the same day even though it was pretty late in the day.
Everything arrived as expected and we are all set to take our trip with the parts we ordered from etrailer.
As an aside - they price match and I thought about trying to get them to match the prices at the other online seller, but I decided that I was so grateful for their help that I didn't want to bother.

Still works great.
Marla - 06/16/2020


I needed this item to connect the Falcon All Terrain tow bar to the base plate on my toad. etrailer had it in stock and delivered it to me quickly. Price was competitive. Anthony knew exactly what I needed when I called.

The towbar works great. Ive swapped out the nuts with nylon locknuts. The nuts and lock washers provided loosened after one trip. The nylon ed ones have held tight. Whatever you use - check them to make sure they stay tight, and use the safety cables that link the tow vehicle and towed vehicle.
Robert - 09/07/2017


Excellent exact replacement part. Wonderful service from etrailer. Sadly UPS screwed up the delivery.


Fit perfectly on my mini. Great instructions on the installation.

Works great!
Steven - 07/10/2021




Unexpectedly found I needed this part, and in a hurry. came through for us in amazing time. Thank you. The part is, as always with Roadmaster, excellent, and so was the whole experience with

Thanks for asking Patrick. We are very satisfied with our Roadmaster towbar and connectors on our Chevy Equinox. Made life a lot easier hitching and unhitching, and improved our marriage. LOL.
Jeff T - 08/26/2014

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