Roadmaster Dual Hitch Receiver Adapter, 6" Drop/Rise

Roadmaster Dual Hitch Receiver Adapter, 6" Drop/Rise

Item # RM-077-6

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Roadmaster Dual Hitch Adapter - RM-077-6
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Product Images

  • Dual Hitch Adapter
  • Fits 2 Inch Hitch
  • 10000 lbs GTW
  • Roadmaster
  • Steel
Add a bike carrier or cargo carrier with the dual hitch receiver. Call 800-298-8924 to order Roadmaster hitch adapters part number RM-077-6 or order online at Free expert support on all Roadmaster products. Guaranteed Lowest Price and Fastest Shipping for Roadmaster Dual Hitch Receiver Adapter, 6" Drop/Rise. Hitch Adapters reviews from real customers.

  • All Info
  • Reviews (6)
  • Q & A (26)
  • Videos (2)
  • Photos
  • Why etrailer?

Roadmaster Hitch Adapters - RM-077-6

Add a bike carrier or cargo carrier with the dual hitch receiver.


  • Allows you to use a hitch-mounted bike rack or cargo carrier while towing your vehicle
  • Constructed of sturdy steel
  • Resists rust and corrosion with durable powder coat finish
  • Requires pin and clip or hitch lock (sold separately)


  • Application: 2" x 2" trailer hitches
    • Dual receivers have 2" x 2" openings
  • Maximum drop: 2"
  • Maximum rise: 6"
  • Gross towing weight: 10,000 lbs
  • Tongue weight: 400 lbs
  • 1-Year warranty

Dimensions of hitch adapter

Note: Designed for flat towing only. Do not use to tow a trailer or a tow dolly. This part should be used only in the drop position. The lower receiver is used for the rolling load, and the top receiver, which is welded directly to the shank, is used for a hitch-mounted accessory.

077-6 Roadmaster Dual Hitch Receiver Adapter, 6" Drop/Rise

Video of Roadmaster Dual Hitch Receiver Adapter, 6" Drop/Rise

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

Video Transcript for Roadmaster Dual Hitch Receiver Adapter Review

Speaker 1: Today we're going to be taking a look at the Roadmaster line of dual hitch receiver adapters. Most motor homes are going to have a hitch on the back, and it's going to come in handy whenever we've got to flat tow our vehicle. But another problem arises. Once we hook it up and we have our tow bar in place, where are we going to put our bikes We don't want to take up any more room than we have to on the inside, and putting a bike inside our vehicle can be a problem, as well. That's where our Roadmaster Dual Hitch Adapter's going to come into play. Now, this can be either in the rise or drop position.

Our Roadmaster series of dual hitch adapters are going to fit into a 2" by 2" receiver tube opening, so they'll fit your RVs that have a 2" hitch on it. And they're also going to provide us with two more receiver tube openings, that way we can carry a bike rack or a cargo carrier while flat towing our vehicle.Each one in the line is going to have a 400 lbs tongue weight, along with a 10,000 lbs gross trailer weight rating. Now, keep in mind that these are designed to work with tow bar set ups to flat tow your vehicle, and they shouldn't be used with trailers. So we did put our hitch adapter in the rise position, so we put that 4" on top, but since it does provide us with that 2" rise or drop on the other side, it dropped it down 2", which made it almost perfectly level. Making sure your flat tow set up is nice and level is always important because we don't want any extra stress, either on our front suspension of our car or pulling down on the hitch on our motor home, that way we have a nice even pulling weight when we're going down the road.Now, each one of our Roadmaster dual hitch adapters is going to provide you with a 2" drop or rise on one end, and on the other end it will have varying height differences, depending on which one you pick up.

There's going to be several different sizes available: 2-1/4" rise or drop, a 4" rise or drop, there's going to be a 6" rise and drop, and also an 8" rise or drop. So we'll go ahead and show you how to measure for the appropriate rise or drop for your flat tow set up.Most tow bar manufacturers are going to want no more than a 3" difference between the connection point of the motor home and the connection point of the car, so you want to try to get it as level as you can. The way we're going to measure, is you want to make sure that your motor home is on nice, flat, level ground, and that if you do have air suspension, make sure it's aired up at the traveling height. Then we're going to take a tape measurer, and we're going to measure from the ground just right to the inside top edge of the receiver tube opening, and in our case, it's just a little bit over 22-1/2". Now we can move over to the car side.Now again, on the car, you want to make sure that it's on nice, level ground, and we'll go ahead and park it.

This time we're going to be measuring right to the center of where our tow bar is going to attach at. So here you can see it's just under about 19-1/2", so we're right at that 3" difference, maybe a tiny bit over. So in our case, since the car connection point is lower, we're going to need a drop, but if yours was higher, you would get a rise. So there is that 3" difference there, so we're going to need anywhere up to a 3" drop to make it nice and level.And in our case, we're going to put it in the rise position, so we can just slide the shank into the receiver tube and line up the pin holes. Now, our dual hitch adapter does not come with a hitch pin, but you can pick those up here at, as well as any locks if you'd like to purchase those.

It is going to accept a standard 5/8" pin and clip, so we can just put it in and much sure everything's secure, and then we can load our bikes up. So now that we have our bikes hooked up, we have a spot down here below that we can hook our tow bar up to, so we'll go ahead and do that now as well.So as you can see, we have our bikes loaded up, as well as the tow bar being hooked up to our car, that way we can take our bikes with us and we can hit the road and start our adventure. And that'll finish up your look at the Roadmaster line of dual hitch receiver adapters.

Customer Reviews

Roadmaster Dual Hitch Receiver Adapter, 6" Drop/Rise - RM-077-6

Average Customer Rating:  4.7 out of 5 stars   (6 Customer Reviews)

Add a bike carrier or cargo carrier with the dual hitch receiver.

- RM-077-6

As advertised and in new condition. Shipping package arived in very poor condition. Almost an empty box. 567123

- RM-077-6

Needed double box so bikes could be carried outside the car in tow. I have not traveled with it yet but from the information I got from etrailer this with the 2.0 Swagman rack should be perfect. The rack is on the back of the Pick Up getting a good shake down and a re-torque of the nuts and bolt before the winter travel. 547091

- RM-077-6

Great product exactly as ordered. This is the perfect setup for a gas motorhome towing a Jeep with a bike rack. Salesperson was top notch and kept me apprised at each step of the process. Thank you etrailer! 669536

- RM-077-6

This product doesn’t accommodate my bicycle rack but does for my tow bar. They are both 2”. The bike rack fits in my motorhome receiver and my old drop down hitch adapter that I purchased from Roadmaster. I had to grind the corners down a little off my 2” bike rack male 2” tube. I’m sure that I can’t be the only person that has encountered this. Other than that I like it. Thank you 657663

- RM-077-6

We have used this hitch for a year, now, and it has shown little sign of wear. No issues....which is how we like it since traveling in a motor home presents enough issues on its own! 646687

- RM-077-6

Absolutely great idea. Work perfect. Excellent website and very easy to purchase from etrailer website. Also needed it overnight and they provided m. 628417


Ask the Experts about this Roadmaster Hitch Adapters
Do you have a question about this Hitch Adapter?

  • Trailer Hitch Adapter to Carry Bike Rack for Electric Bikes and Flat Tow Behind Motorhome
  • To use a bike rack while you flat tow a vehicle behind your motorhome all you will need is a dual hitch adapter. There are three of these that could work depending on the rise or drop you need. All of these have a towing capacity of 10,000 lbs and tongue weight capacity of 400 lbs. - Roadmaster Dual Hitch Receiver Adapter, 2-1/4" Drop/Rise # RM-077-2 - Roadmaster Dual Hitch Receiver Adapter, 4" Drop/Rise # RM-077-4 - Roadmaster Dual Hitch Receiver Adapter, 6" Drop/Rise # RM-077-6 -...
    view full answer...

  • How to Carry a Bike Rack and Flat-Tow a Vehicle
  • There is not a maximum length ball mount or hitch extension that can be used in a flat-towing setup. However, the further out you go, the less tongue weight the ball mount or extension will be able to carry which is not really an issue for a flat-towing setup but is something you need to keep in mind. The best option we have for you to flat-tow your vehicle and carry a bike rack is with the Roadmaster Dual Hitch Receiver Adapter part # RM-077-2 for 2-1/4" rise/drop, part # RM-077-4...
    view full answer...

  • Is Thule EasyFold XT 2 Electric Bike Rack the Best Option for Back of Motorhome
  • The Thule EasyFold XT 2 Electric Bike Platform Rack # TH903202 is absolutely going to be the best option to carry your two e-bikes on the back of your 2018 Tiffin Allegro 34PA, and it can also be used with your Cherokee, but NOT when the Cherokee is being flat towed. The EasyFold XT has a weight capacity of 65 lbs per bike which will accommodate your needs, and the fenders will not be an issue because the EasyFold uses ratcheting straps to secure the wheels and has independent arms that...
    view full answer...

  • How To Carry Bikes While Flat-Towing a Chevy Sonic Sedan
  • Yes, I do have an option for you to carry bikes with your flat-tow setup. However, since there is not a trailer hitch for your vehicle yet and you don't want to use a trunk mount or roof rack bike rack then you will have no other option but to use a dual hitch adapter and place the bikes on a hitch mounted back rack between the tow vehicle and toad. For this, we have a few options for you depending on your rise/drop needs. In order to determine what your rise/drop needs are we will...
    view full answer...

  • Dual Hitch Receiver to Clear 6 Inches for the Back of an RV
  • We do have MaxxTow adapter # MT70070 which measures 6 inches from the center of the hitch pin hole to the back of the top receiver. If you are needing the dual receiver in order to carry an accessory at the back of your RV while also flat towing a vehicle behind the RV then there are some options that will work for you such as Roadmaster dual receiver adapter # RM-077-2 (2 inch rise/drop), # RM-077-4 (4 inch rise/drop), # RM-077-6 (6 inch rise/drop), or # RM-077-8 (8 inch rise/drop)....
    view full answer...

  • Can Roadmaster Dual Hitch Receiver Adapter be Used with a Winch
  • I do have a solution for you but when I reached out to my contact at Roadmaster they did not recommend using the Dual Hitch Receiver Adapter # RM-077-6 with a winch. Instead what I recommend using is a Gen-Y Hitch. We have part # 325-GH-313 which has a 5" rise/drop and part # 325-GH-314 which has a 7-1/2" rise/drop which you can use. These are much more heavy-duty than the adapters used for flat towing so you can definitely use it with your winch on a mounting bracket like part # BDW20011...
    view full answer...

  • Does Roadmaster High Low Adapter # RM-077-6 Cut Capacity of Hitch It's Used On
  • If you use a hitch adapter like the part # RM-077-6 you do cut the tongue weight capacity of the hitch by 50 percent. This is true regardless of the capacity of the adapter. If the capacity reduction is fine it can be used with the Curt cargo carrier part # C18153.
    view full answer...

  • How To Use a Tow Dolly and Carry A Cargo Carrier On the Back Of A Motorhome
  • The best option we have for you to use both your tow dolly and cargo carrier at the same time is with the Curt Multipurpose Ball Mount with 2" Receiver part # D210. You can then add a hitch ball part # 63845 for 2" or part # 63847 for 2-5/16". The reason that this will be the best option for you is because it will not limit your towing capacity like other dual hitch adapters will. For example, the Curt Dual 2" Receiver Tube Adapter part # D-192 will allow you to use both a tow dolly and...
    view full answer...

  • Which Dual Hitch Adapter Has the Highest Tongue Weight Capacity
  • The dual hitch adapter we carry with the highest tongue weight capacity is the Roadmaster Dual Hitch Receiver Adapter part # RM-077-6 for 6" rise or part # RM-077-8 for 8" rise. They both have a 400 lb tongue weight capacity. Please note that this adapter is designed for flat towing only. If you can give me a better idea of what you are using the adapter for we may have alternative options if the above will not work.
    view full answer...

  • Hitch Extender with 4 to 6 inches of Rise to Carry a Bike Rack or Cargo Carrier
  • It sounds like you're looking for a hitch adapter that gives you 4 to 6 inches of rise to carry a bike rack or cargo carrier. We don't have a standard adapter with a rise but we do carry dual hitch adapter that have two receivers where one is used in the rise position. You don't have to use the other receiver opening if you don't need it. I recommend the Roadmaster, part # RM-077-6, because it has a 6 inch rise and is rated for up to 400 pounds of tongue weight. Since it has its own...
    view full answer...

  • Dual Hitch Adapter for Flat Towing 4,200 lb Vehicle and Carrying Bike Rack
  • The best solution we have would be to use the dual-hitch adapter part # RM-077-6 which would be the only adapter we offer with enough capacity for flat towing a 4,200 lb vehicle and has upper hitch opening that you can use for a cargo carrier or bike rack. If your tow vehicle is going to be a motorhome you'll need to be sure you are using a bike rack rated for the rougher ride quality at the rear of a motorhome like the Swagman XC part # S64650.
    view full answer...

  • Is There an Option to Lower the Trailer Hitch Receiver for Motorcycle Carrier Use?
  • There really isn't an option to lower your hitch 6 inches and carry 400 lb motorcycle with carrier. The Roadmaster Dual Hitch Receiver Adapter, 6" Drop/Rise # RM-077-6 is the strongest option with a 400 lb tongue weight capacity that doesn't account for the weight of the carrier, so is not a working option. Adapters simply are not strong enough for the tongue weight you are seeking. Your best option is to use the Replacement Shank for Gen-Y Adjustable Ball Mount - 2" Hitch - 7-1/2"...
    view full answer...

  • Will Turning Clearance Issue Arise with Roadmaster Dual Hitch Adapter part # RM-077-6 and Bike Rack
  • Turning interference or interference from incline changes are possible with dual hitch adapters like the # RM-077-6. With the length of an RV flat towing a vehicle and the fact that the towed vehicle has 2 axles the pivot down on the inclines typically isn't too severe so clearance issues aren't common. Especially if the dual hitch adapter has a 6 inch rise difference like with the # RM-077-6. The Yakima bike rack would have to be RV approved like the Yakima RoadTrip 4 # Y02477 which...
    view full answer...

  • How To Carry a Bike on the Back of a Motor Home While Flat-Towing
  • In order to carry bikes on the back of your motor home while also towing your 2019 Honda Fit you will first need a dual hitch adapter which I have attached a list of options for your below. Roadmaster Dual Hitch Receiver Adapter (4" Rise/Drop) - part # RM-077-4 Roadmaster Dual Hitch Receiver Adapter (6" Rise/Drop) - part # RM-077-6 Roadmaster Dual Hitch Receiver Adapter (8" Rise/Drop) - part # RM-077-8 In order to determine which is correct for your setup you will need to do a...
    view full answer...

  • Carrying Bikes on an RV While Flat Towing a Jeep
  • I recommend using a hitch mounted bike carrier on the back of the motorhome with a dual adapter like part # RM-077-6. The correct hitch adapter you need depends on if you need a rise or drop in order to tow the Jeep level. I've linked our complete selection for you. You could use a hitch mounted rack on the back of the Jeep but there's a lof of movement on the back of a towed vehicle and most racks aren't rated to handle the additional stress so your rack choices would be very limited....
    view full answer...

  • Solution to Use Thule Bike Rack While Flat Towing Jeep Wrangler
  • It is true that you should not use your Thule T2 Pro XTB 2 Bike Platform Rack # TH9034XT on your Jeep Wrangler when it is being flat towed. The reason is the amount of movement that far behind your motorhome results in the rack not being stable; this is also why this rack should not be used on the back of a trailer. What you can do instead is use a dual hitch receiver adapter which will allow you to both flat tow your Jeep and use your bike rack. The correct one will depend on the rise...
    view full answer...

  • Hitch Adapter to Allowing Towing and Cargo Carrier Installation
  • You can use Curt Multipurpose Ball Mount part # D210 to both tow your boat trailer AND use your hitch cargo carrier. Please refer to the linked photo. This item has 500-lbs tongue weight capacity for the receiver and 750-lbs for the ball mount part you'll use to tow. Please note that when mounting an accessory in this receiver, your hitch's tongue weight capacity will be reduced by 50 percent. For a hitch ball you can use # 19260 for a 1-7/8-inch, # 63845 for a 2-inch or # 63847 for...
    view full answer...

  • Recommended Rise Adapter for Carrying Motorcycle with a 2018 Ram ProMaster 2500
  • Although an adapter that raises the height of the receiver will definitely help with the clearance issue you are talking about with your 2018 ProMaster 2500 please note that any adapter like this will reduce the weight rating of your trailer hitch by 50%. Using the Roadmaster Dual Hitch Receiver Adapter # RM-077-6 honestly makes me a little nervous because you are not only reducing the weight rating of your trailer hitch but you are also maxing out the tongue weight rating of the adapter....
    view full answer...

  • Will Swagman Escapee Bike Rack Have Enough Clearance to be Used When Flat Towing
  • You can absolutely use the Swagman Escapee 2 Bike Platform Rack # S64693 with a dual adapter like the Roadmaster Dual Hitch Receiver Adapter # RM-077-6 and Roadmaster tow bar as there will be enough clearance. The Escapee measures 36 inches from the center of the hitch pin hole to the furthest part of the rack and the Roadmaster tow bars we carry, the Nighthawk All Terrain # RM-676,Sterling All Terrain # RM-576, Falcon All Terrain # RM-522, and Falcon 2 # RM-520 each have the necessary...
    view full answer...

  • Can Roadmaster Dual Hitch Receiver Adapter # RM-077-6 be Used with Tow Dolly
  • At one point Roadmaster would only recommend the use of the Roadmaster Dual Hitch Receiver Adapter # RM-077-6 with flat towing setups but they recently changed that stance and now allow the hitch adapter to be used with a tow dolly like they told you.
    view full answer...

  • Recommended Front Mount Receiver for Bike Rack on 2013 Thor Tuscany RV
  • Based on my research your 2013 Thor Tuscany is built on the Freightliner XC chassis. There is not a custom front hitch available for this vehicle so your best option will be with a universal design like the Curt # C13702. This hitch can be either welded or bolted on with the included hardware and it fits frames that are 18 to 15 inches wide. It has a 2 inch receiver and a 500 pound tongue weight capacity. If you already have a rear hitch receiver but are using it for something else...
    view full answer...

  • Can Thule 4-Bike Rack and Cargo Carrier be Used Together with a Dual Hitch Adapter
  • If you are planning on using the Roadmaster Dual Hitch Receiver Adapter # RM-077-6 with a passenger vehicle then you potentially can use a cargo carrier like the Reese # 63153 with a Thule bike rack like the Hitching Post Pro # TH934XTR. The only draw back to this though is that I don't think that you are really going to be able to utilize the cargo carrier with the bikes installed as they will be sitting over most of the cargo carrier tray. There are a few things to note with this situation...
    view full answer...

  • Is it Possible to Carry a Scooter Carrier and Flat Tow a Vehicle
  • A scooter carrier is a bit heavy but we do have dual hitch adapters like the Roadmaster part # RM-077-6 which have a tongue weight capacity of 400 lbs and is designed for flat towing a vehicle and carrying an accessory above it.
    view full answer...

  • Multipurpose 2-Inch Ball Mount to Allow Both Trailer Towing and Hitch-Mount Accessory Use
  • For your Mercedes-Benz Sprinter-based RV we do not offer an actual trailer hitch receiver with dual openings, such as # TLC1204 from TorkLift. For the 2018 Sprinter 3500 chassis, as an example, we do offer single receiver hitches shown on the linked page. Their fits vary depending on wheelbase and bumper type. We DO have hitch adapters like Roadmaster # RM-077-6 that allows both flat towing with a tow bar and use of a hitch-mount accessory like a bike rack or cargo carrier. However,...
    view full answer...

  • Parts Needed to Flat Tow 2017 Ford Explorer
  • Yes, the parts you mentioned are the correct parts you need to flat tow your 2017 Ford Explorer. The base plate kit part # BX2668 is the correct kit for your vehicle, the Alpha tow bar part # BX7365 is a fantastic option that you'll really like as it has non-binding arms and is very easy to use. The Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit # RM-15267 is a great kit too for wiring as it allows you to control the taillights of the vehicle with the motorhomes trailer wiring...
    view full answer...

  • Swagman Bike Rack for Use on Towed Vehicle
  • I do have a great option for you, however the Swagman Chinook 2 Bike Platform Rack # S64683 referenced in your question is not rated for use at the rear of a towed vehicle. The ride at the back of your towed Jeep Grand Cherokee is going to be quite a bit different than at the rear of the RV or a standard passenger vehicle and this can put more stress on the rack during travel. Because of this only certain carriers are tested and approved for this application. If you want to use the...
    view full answer...

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Info for this part was:

Expert Research:
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Video Edited:
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Expert Research:
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Video by:
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Installed by:
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Updated by:
Sarah W
Installed by:
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Updated by:
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Updated by:
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