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Replacement Inner Arm for Roadmaster Falcon 2 and BlackHawk Tow Bars

Replacement Inner Arm for Roadmaster Falcon 2 and BlackHawk Tow Bars

Item # C000172
Our Price: $121.83
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Roadmaster Accessories and Parts - C000172

  • Tow Bar
  • Arms
  • Inner Arm
  • Falcon
  • Blackhawk
  • Roadmaster
  • Driver Side
  • Passenger Side


  • Replaces the inner arm for the Roadmaster BlackHawk or Falcon 2 tow bar
  • Made in the USA

C000172 Roadmaster Replacement Inner Arm for Falcon 2 and BlackHawk Tow Bars

Video of Replacement Inner Arm for Roadmaster Falcon 2 and BlackHawk Tow Bars

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

Video Transcript for Roadmaster Tow Bars Replacement Inner Arm Review

Today, we're gonna repair a Falcon 2 Tow Bar using part number C000172 from RoadMaster. This is a replacement inner arm for RoadMaster Falcon 2 and BlackHawk tow bars. Right, here's our Falcon 2 Tow Bar we've got right here and you can see the damaged component right here. All right. The reason why this is dented is because you broke the golden rule: never back up the tow bar. So, what happens is that something's gotta give when you back up.

Tow bar is designed to go forwards not backwards and this is gonna be your end result. Now, our kit consists of these two parts. Of course, the metal arm right here and a replacement locknut. You get a replacement nut for this part of the hardware right here. Everything else, including this and a bolt, will be reused. Now, let's go ahead and start working on the disassemble of our tow bar to repair it.

Here's a little plastic cap right here, which you can pry off with a screwdriver. We'll save that and put it back on later. Next up, we need to remove the swivel ear right here by taking apart this bolt. We'll need a quarter inch Allen key for the top and a nine sixteenths socket or a wrench for the bottom. Remember, we'll save the bolt but we have a new nut.

And save all the other pieces as well. Next up, we need to remove the round nut, which isn't put on tight at all, so you can simply unthread it. All right, now the real fun begins because this arm cannot be removed going off the back here. It has to go off the front. Of course, it's bent. We can't do that.

So, we're gonna have to take a cutting wheel and cut as close as we can to the edge here and then take off the rest out the front. Now, our bar was in the lock position so we'll inaudible 00:01:47 by pushing the button down. We'll give it a few taps with a hammer to get it started. Now, take a pry bray or some kind of rod. We can just push this through out the front. To help push out the rest of the old part, I'm gonna use a couple extensions three eights stacked up and just used to help put it out. Okay When you get it pushed it out, pull out the rest. Now, we have all the internal pieces apart, now would be a good time to take a towel or a shop towel or anything you've got and we're gonna take it and push it through and make sure you get all the dirt and debris that you can out. Now, let's take our new component. Slowly slide it into place. Before we push it in, two things to know. First off, make sure that this washer on the bottom is in its original spot like it was first, then we have to go to the other end and raise it up so we can help push it in. Now, to get it over its edge right here, I'm gonna take a screwdriver, stick it in there, and pry it up. Hopefully, you saved this part here because we need this little piece here and the little spring that's underneath it. We'll transfer them to the new component, then we'll push it inside. We'll pull it through and check to make sure it locks in the place and we have proper operation. Now, we'll go ahead and start reinstalling our parts. We'll start easy with our little plastic cap on the end. Let's go ahead and reinstall our round nut. I'm gonna actually add some anti-seize compound to the threads, just in case this needs to be serviced again. Hopefully not. Slide a round nut on and thread it into place. Now, I'm gonna continue threading this on until we can see the threads of the rod come through here and you can see a little detent right there. So, that detent in the end of the rod has to match up with the holes on our round nut, so we'll back it off until it evens up. We should have minimal play between the bolt and this arm when it's all said and done. I'll go ahead and test it a few times. There. Swivel ear goes back into place. Make sure you save those bushings. We'll install it the same way that it came off. Might need a screwdriver to help align things and reinstall our bolt. May help you to use the screwdriver align the little bushing on the bottom there. Go ahead and make sure it pushes into place. Now, I'll install our new locknut right here and tighten it down with original tools. Now, when we tighten this down, we will make it's snug not over tight. We want to make sure it still swivels. So, we'll go ahead and compare it from our original one right here. Make sure it has the same amount of pay as the original one did. Once we've satisfied that requirement, we're good to go. We're now finished with part number C000172 from RoadMaster. The replacement inner arm for RoadMaster Falcon 2 and BlackHawk tow bars.

Customer Satisfaction Score:

Customer Reviews

Replacement Inner Arm for Roadmaster Falcon 2 and BlackHawk Tow Bars - C000172

Average Customer Rating:  4.9 out of 5 stars   (28 Customer Reviews)


Always good service and quality products


With the help of the video, replacing the inner arm was quite easy. The only caution I would add, is about the detent and spring in the end of the arm. It got away from me when I pushed the arm out. It took me over an hour to find them. A caution PRIOR to pushing the remaining portion of the arm out. Also a caution as to which way the connecting end is installed on the arm. It will go on either way but there is only one right way.


Fast ship. Perfect fit. Reasonable price. Until I visited their site I didn't even know the bar could be fixed. I especially liked the mounting instructions. Without them I would have had a hard time replacing the bar.


Product is great but the delivery time to get the parts was not very good. I understand it wasn't your fault but I think you sould put more pressure on the supplier to supply the parts when needed, especially something so trivial as the round nut I needed. Would have been very unhappy if I had a trip planned!!


The product was exactly as advertised. The photo of the replacement inner arm for our tow bar helped me identify it as the correct one. Shipping was prompt and communication was good.


Always first class service from etrailer. I have bought most of their items they offer for my trailer and motorhome. Excellent products at reasonable and fair prices. 5 Stars!


The item I ordered was on back order but the communication from etrailer was excellent. I highly recommend using this company.


Fit was perfect installed easily.


Perfect replacement. I didn't realize that I had a RM 5250 tow bar. I thought I just had a Falcon 2. I had to return the first part which went without a problem.


Everything was just as expected. The video on eTrailer's website was very helpful.


Got it quick and it worked perfect. I watched the video on how to properly install it, it was very easy


Your company has products I cannot find anyplace else. Good price and fast service also. Keep up the good work.


great fast service, just as described

Works just as expected
Don S - 02/27/2021
Works great
Don S - 02/27/2021


Exact replacement for my bent bar, How to Video was most helpful.


Always on time and the right parts. Outstanding service.


The product is well done and it easy to replace.







Every thing was excellent.


Worked perfectly. You video made it very easy to install.



Show More Reviews

See what our Experts say about this Roadmaster Accessories and Parts

  • Do you have a Replacement Arm for the Falcon 2 Tow Bar
    Yes the Replacement Inner Arm for Roadmaster Falcon 2 and BlackHawk Tow Bars part # C000172 is a confirmed fit for the Falcon 2 5250 Tow Bar.
    view full answer...
  • Availability of a Replacement Stainless Steel Arm for a Roadmaster Falcon 2 Tow Bar
    Yes, you can replace the arms of your Roadmaster Falcon 2 tow bars # RM-520 with a replacement inner arm # C000172. I am not sure of your current setup or if anything has changed since you have had the Falcon 2 tow bars, but if you let me know your year, make and model of your vehicle I would be more than happy to ensure you still have the proper towing setup. To choose a weight distribution system you will need to go by the total tongue weight of the set up. This is calculated by taking...
    view full answer...
  • Troubleshooting Roadmaster Falcon 2 Tow Bar with Stuck Inner Arm
    The first thing you should do is check the bar with a straight-edge to determine if it is bent. If you determine that it is straight you will need to disassemble it and clean it. There is a nut on the forward end by the pivots, and a keeper assembly that installs with circlips at the lever. I would recommend you take pictures as you disassemble it so that you will know how it reinstalls. Next step is to clean it like you never want to clean it again. Next, you will want to reassemble it...
    view full answer...
  • What To Do When Your Falcon 2 Tow Bar Crumples From Driving In Reverse
    Unfortunately tow bars are only designed to pull forward and will crumple just like yours did if you put any pressure on it going in reverse. The Brightside here is that you may be able to get away with just replacing the arms if they are the only damaged part. You'll need two of part # C000172 and you'll want to watch the attached video below where Joe will walk you through replacing the arms. If you end up having other broken parts on your tow bar send me a picture and I'll try to...
    view full answer...
    Image 1 for
  • Roadmaster Falcon 2 Tow Bar Inner Arm Dimensions
    The Round Nut for Roadmaster Towbar Inner Arm # RM650004-80 is 22MM and has a thread pitch of 1.35MM. The Replacement Inner Arm # C000172 has a shaft diameter that is 7/8" while the shaft length from the threads to the collar is 14-1/2". The overall length of the shaft is 19-1/8".
    view full answer...
    Image 1 for
  • Replacement Arm for Roadmaster Falcon Tow Bar 5250
    Yes, we do have full replacement arms for the Roadmaster Falcon Tow Bar 5250, part # 910021-70 for the driver or part # 910021-80 for the passenger side. We also offer just the inner arm as a replacement, part # C000172.
    view full answer...
  • Replacement Inner Arm for Roadmaster Falcon 2 Tow Bar
    I recommend replacing the inner bar in question with the Roadmaster Inner Arm # C000172. This inner arm is designed to fit the Roadmaster Falcon 2 and BlackHawk Tow Bars. For a replacement inner arm for the Falcon All Terrain Tow Bar, you will instead use part # 910021-65. I have attached a short installation video on this replacement part for you to check out. I also recommend checking the rest of the tow bar to ensure no other areas were damaged. If you find you need to completely replace...
    view full answer...
  • Replacement Pins, Clips, and Inner Arm for Roadmaster Falcon 2 Tow Bar
    For replacement pins we have those as part # RM-910029. When it comes to the arm not moving freely I imagine it was damaged if it was drug on the ground for a bit. If it's just the inner arm then you can replace it with part # C000172. We also have the Service Kit # RM910003-65 you can use to try to get everything running back to normal.
    view full answer...
  • Parts for Replacing Autowlok Buttons on Roadmaster Falcon 2 Tow Bar
    Yes, the Complete Repair Kit for Roadmaster Falcon 2 and BlackHawk Tow Bars # RM-910003-60 will give you the parts needed to replace broken Autowlok button assemblies on your Roadmaster Falcon 2 Tow Bar # RM-520. The other thing to keep in mind is that it is also possible your Falcon 2 could have a damaged inner arm if it is stuck. If that arm is damaged you would be able to replace it with the Replacement Inner Arm for Roadmaster Falcon 2 and BlackHawk Tow Bars # C000172. I've added...
    view full answer...
  • Replacement Swivel Collars for the Ends of the Arms on a Falcon 2 Tow Bar
    It sounds like you are talking about the swivel collars, # RM-9200-4, on the ends of the arms of the Falcon 2 tow bar # RM-520. These are the parts that attach to the base plates. Considering what happened with your tow bar I would give it a thorough inspection because there could be internal damage that isn't obvious. Make sure the arms go in an out and if they do not then they could be bent. The replacement inner arm is # C000172. The replacement inner and outer, passenger side, is...
    view full answer...

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Info for this part was:

Employee Joe V
Installed by:
Joe V
Employee Jacob T
Video Edited:
Jacob T
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Zach D
Video by:
Zach D

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