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Roadmaster Dual Hitch Receiver Adapter, 2 " or 8" Drop/Rise

Roadmaster Dual Hitch Receiver Adapter, 2 " or 8" Drop/Rise

Item # RM-077-8
Our Price: $227.96
Hitch Adapters
Shipping Weight: 27 lbs
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Add a bike carrier or cargo carrier with the dual hitch receiver. 1-800-940-8924 to order Roadmaster hitch adapters part number RM-077-8 or order online at Free expert support on all Roadmaster products. Great prices and Fastest Shipping for Roadmaster Dual Hitch Receiver Adapter, 2 " or 8" Drop/Rise. Hitch Adapters reviews from real customers.
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  • Reviews (112)
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Roadmaster Hitch Adapters - RM-077-8

  • Hitch Extender
  • Dual Hitch Adapter
  • Fits 2 Inch Hitch
  • 10-3/4 Inch Extension
  • 10000 lbs
  • Bike Racks
  • Cargo Carriers
  • Hitch Mounted Accessories
  • Trailers
  • Roadmaster

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
  • Drop: 2 " or 8"
  • Rise: 2 " or 8"
  • Gross towing weight: 10,000 lbs
  • Tongue weight: 400 lbs
  • Limited lifetime warranty

Dimensions of Hitch Adapter


  • Not for use when towing a trailer.
  • Using this extension will reduce your hitch's tongue weight capacity by 50 percent.

077-8 Roadmaster Dual Hitch Receiver Adapter, 8" Drop/Rise

Installation Details RM-077-8 Installation instructions

Customer Satisfaction Score:

Customer Reviews

Roadmaster Dual Hitch Receiver Adapter, 2 " or 8" Drop/Rise - RM-077-8

Average Customer Rating:  4.9 out of 5 stars   (112 Customer Reviews)

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


Works great! I use it on my motorhome to carry my bikes with a Rocky Mounts Carrier and flat tow my car with my Blue Ox system. It places the bike carrier at an optimal height over the front of the car but my may be different for other bike carriers. Very sturdy and seems to be quality all around.


Excellent workmanship and quality but a little overpriced but not bad definitely will be purchasing more roadmaster accessories


Works great. We're towing a jeep and have a bike rack behind our motor home.

Bob J.


Great. Havent lost the bikes or jeep.

Patrick W.


They have not remedied the problem of the rounded receiver. Just bought the 10” rise adapter, absolutely built tough as nails. However, the two have the duel hitch receiver adapter receivers are rolled corner 2” stock. Will not allow 2” square hitch to go inside. Very disappointed as other post stated that problem was resolved.


Great quality. Used for lowering bike carrier that will be used for 2 electric bikes(55lbs each). Reordered same product in 6 inch drop. This should be perfect.


This specific double hitch is a must when using a Roadmaster 2 tow system and a bike rack. The hitch rases the bike rack up high enough to properly use the tow system.


I ordered this to adapt my bike rack to my hitch while I flat towed my car with a Blue Ox Aventa tow bar. I was concerned about turn radius and I stumped the etrailer customer service.
I ended up with about 18” of clearance and 47” from the adapter to car.
I feel it is sufficient.


Wow, excellent customer service. Thank you Jennifer is rare in our world today to say that. Hitch adapter shipped same day on a late afternoon order. No extra effort; just the way this company refreshingly does business. Part arrived promptly and well packaged. No nicks or scratches on the part. Truly was well stored and handled at their warehouse. Following are some pictures of the hitch adapter installed.


I just received hitch today. Pleasantly surprised that it actually arrived earlier than expected. It is every bit as described. Strong and sturdy. Cannot go wrong with Roadmaster. Can’t wait to hit the road. Thank you Natalie with for your support and quick response.


Shipped alot quicker than anticipated. Great fit for my application. Excellent service. Easy return of previous item. Thank you.


Well made product. Still working great.


Great product! We are able to Mount our bike rack on top and our tow bar in the bottom. Great service from


I have purchased four front mount hitches from etrailer and quite satisfied with product quality, fit and ease of installation. I purchase the dual receiver adapter to accommodate a winch and be able to use a front tow ball without the extra effort of removing winch to use ball. As usual quality was not an issue with the adapter. The slider on the adapter was solid stock rather than thick wall box tubing lending to superior strength. Welds and engineering are, as always, exceptional. I highly recommend etrailer products.


Very impressed with the quality of the hitch. We purchased a new motor home and needed a different height hitch. Had trouble finding the size we needed until we checked trailer. Thank you for meeting our needs.


Appropriately heavy for the job!


Great site. Easy to get around.


This receiver is strong and with the anti-rattle stabilizer has been a great addition to our RV trips to add a bike rack and be able to tow a vehicle.


This was the perfect product to get the hitch height of my Class A gasser to the right level to tow a car flat behind it. I just used it this weekend and it has worked flawlessly. I forgot all about it, which i guess it what should happen with this type of equipment. etrailer is extremely helpful on the web page and the phone and I have used them for several purchases since getting my old Class C five years ago.

BTW, this thing is heavy! The receiver tongue is solid steel, not a tube. It has become a permanent fixture in the hitch.


This hitch adapter works great! It allows me to use my bike rack with my cargo rack so we can haul our bikes along with all of our other stuff when we head out on our summer vacation. I also use it regularly as a hitch extender when I need to haul something in my truck with the tailgate down, and we want to take the bike rack. Only, drawback is it is pretty heavy duty (probably more than what I need), but if you are using it with a heavier trailer (e.g., camper or big boat), it probably should be that heavy duty.


Purchased this to use on a 2016 Winnebago Adventurer 37F towing a 2013 Honda CR-V. Attached a Schwegman 2 bike rack on top with a Blue Ox towbar below. Works great, plenty of clearance between the bikes and the car. Only issue is the hole for the pin when attached to the RV could be a little larger. The blue ox locking pins are a tight fit


The hitch is heavy-duty and works as expected. We can mount a bicycle rack or an extra
luggage rack on the back of the RV and still pull our tow vehicle without any problems

Steve G.


The hitch adapter still works great! No problems at all.


Great product! I was concerned it might be a bit too lightweight to be safe to use in that extended configuration, but once it arrived and I installed it on my 2022 Thor Magnitude Super-C my worries went away.
Matter of fact my RV and New Jeep Grand Cherokee L are both at the dealer being set up for Tow using a Blue Ox tow bar.




I bought this for our class A. We pull a small Fiat and needed a second receiver output to mount a ham radio antenna. This mount is rated at 10,000 lbs and exceeds the rating on our hitch which is what we needed. It works perfectly for our purposes. This is not the first hitch related component we have purchased from ETrailer. They offer quality goods.


Product seems well made. It arrived yesterday and I already have it installed. Thanks etrailer!


I was able to use the Tow Bar four times to pull a Ford Fiesta. It worked great. It was easy to hookup. The car follow the RV with no problems.
I need to develop a technique to disconnect the car from the RV. It is still hard to unhook the tow bar from the car even after I lift the release handles.

Show More Reviews

See what our Experts say about this Roadmaster Hitch Adapters

  • Can Roadmaster Dual Hitch Receiver Adapter w/ 8" Drop/Rise be Used With Tow Dolly
    Hey Jim, thanks for the question and to get a definitive answer I went right to the source, which is the manufacturer, Roadmaster. They said, yes, there is no issue at all and a tow dolly can absolutely be used with the Roadmaster Dual Hitch Receiver Adapter, 2" or 8" Drop/Rise # RM-077-8
    view full answer...
  • Can Roadmaster Dual Hitch Adapter # RM-077-8 Be Used to Flat Tow Lifted Jeep
    The Roadmaster Dual Hitch Receiver Adapter # RM-077-8 that you referenced is designed for exactly your situation. It will allow your tow bar to set level as you flat tow the lifted vehicle.
    view full answer...
  • Availability of Dual Hitch Receiver Adapter with 6 Inch Drop
    The closest option we have available to what you are needing is the Roadmaster Dual Hitch Receiver Adapter # RM-077-8. This adapter features dual 2 inch receivers and has either an 8 inch rise or 8 inch drop for the bottom receiver. It has a 10,000 pound towing weight capacity and a 400 pound tongue weight limit. I have attached a short video demonstration on this product that you can also check out.
    view full answer...
  • Distance from Pin Hole Center to Back of Support Arm on Roadmaster Dual Receiver RM-077-8
    I measured the Roadmaster Dual Hitch Receiver Adapter # RM-077-8 for you. On the long support arm the distance from the back of it to the center of the hitch pin hole is 6-5/8 inches. But to the support gusset that measurement is 4-3/4 inches. I have included a picture showing these measurements for you.
    view full answer...
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  • What Hitch Works to Flat Tow and Carry a Bike Rack
    The Roadmaster Dual Hitch Receiver Adapter, 8" Drop/Rise # RM-077-8 was designed for exactly this purpose. The 8" rise will allow you to mount a bike rack up higher than your vehicle, providing plenty of clearance between a bike rack and the flat towed vehicle.
    view full answer...
  • Roadmaster Dual Hitch Receiver # RM-077-8 Measurement To Receiver Tubing From Hitch Pin Center
    The measurement for the blue section that you drew on the Roadmaster Dual Hitch Receiver # RM-077-8 is 6-1/2".
    view full answer...
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  • Can Roadmaster Dual Hitch Receiver Adapter be Used to Level Roadmaster Tow Bar
    Yes, the Roadmaster Dual Hitch Receiver Adapter, 8" Drop/Rise # RM-077-8 that you referenced is actually designed specifically for your situation to allow a tow bar to sit as level as possible. I attached a review video for this for you to check out that shows how it works/installs as well.
    view full answer...
    Image 1 for
  • Can Roadmaster Dual Hitch Receiver Adapter # RM-077-8 be Used to Carry Scooter Carrier
    The upper hitch opening of the Roadmaster Dual Hitch Receiver Adapter # RM-077-8 that you referenced has a 400 lb tongue weight capacity. So as long as the weight of your scooter and carrier is less than 400 lbs together this would work for your needs. You should note that when using this adapter you end up cutting the tongue weight capacity of the hitch by 50 percent so you'd need to make sure that the hitch of your vehicle has twice the capacity needed for the weight of your scooter...
    view full answer...
  • Hitch Extender for Cargo Carrier with Lift
    I couldn't recommend the use of the # RM-077-8 with your 12 inch extender as that would be way too long, but it's possible that this by itself would work for you. You'd end up with an extension of 10-3/4 inches instead of the 12 you have but it would give you a rise of 8 inches total.
    view full answer...
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  • Can a High-Low Adapter and Dual Hitch Receiver Adapter Be Used In Combination
    The Roadmaster Dual Hitch Receiver Adapter, 8" Drop/Rise # RM-077-8 is made to allow you to tow as well as use an accessory. It will allow you to flat tow up to 10,000 lbs and will allow a tongue weight of 400 lbs. The other dual receiver options do not have the capacity to tow a medium sized vehicle as well as a cargo carrier. The issue you will find with needing a 6 inch high-low adapter that using two adapters at the same time will put too much torque on the hitch and will also put...
    view full answer...
  • Dual Hitch Receiver Compatible with Towing a Car Dolly
    The Roadmaster Dual Hitch Receiver Adapter, 8" Drop/Rise # RM-077-8 has a towing capacity of 10,000 lbs but the tongue weight is limited to 400 lbs. As long as the tongue weight of your loaded tow dolly and whatever accessory you put in the top receiver is under the 400 lbs then you'll be just fine.
    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...
  • Dual Hitch with 6 Inches of Drop
    Sure is. You need part # RM-077-6 which has a rise or drop of 6 inches depending which way you use it. It's exactly like part # RM-077-8 except for the amount or rise/drop.
    view full answer...
  • Which Roadmaster Dual Hitch Adapter For Carrying Bike Rack While Flat Towing
    Since the receiver height and the base plate height of the vehicle is the same, you won't need to worry about keeping the tow bar level. If your bike rack has an angled shank with a couple inches of rise to it, you could use the # RM-077-6. If the bike rack has a straight shank, you'll want a dual-hitch adapter with a larger rise such as # RM-077-8 for an 8-inch or # RM-077-10 for a 10-inch rise to move the bike rack up and out of the way. The adapters have a tongue weight capacity...
    view full answer...
    Image 1 for
  • How Much Does the Roadmaster RM-077-8 and RM-048-8 Weigh?
    As the Roadmaster Dual Hitch Receiver # RM-077-8 has a solid shank for added capacity, it does weight right at 28 pounds. I had the Roadmaster High-Low Adapter # RM-048-8 measured as well. From center of one pin hole to the center of the other is actually 10 1/2 inches, which I am having added to the product page. This is also a little lighter than the # RM-077-8 at 23 pounds. It should also be noted, however, that this is not designed to be used for towing a trailer. Both of these are...
    view full answer...
  • Using Dual Hitch Adapter For Bike Rack and Small Travel Trailer
    You could use a dual hitch adapter like the MaxxTow # MT70070, however doing so will reduce the tongue weight capacity of your hitch by half. You'll want to take a look at the ID sticker on your hitch, and find the tongue weight rating printed there. If the tongue weight of the fully loaded travel trailer plus the weight of the bikes and the rack they're carried on does not exceed half the listed hitch tongue weight, then you'd be safe to use an adapter like the # MT70070. If it does exceed...
    view full answer...
  • Recommended Dual Hitch Adapter for Newmar Baystar Towing 2013 Jeep Wrangler Unlimited
    Thank you for providing those helpful measurements. With the 8" difference I would go ahead and choose the Roadmaster Dual Hitch Receiver Adapter, 2 " or 8" Drop/Rise # RM-077-8 over the # RM-077-6. Loading it won't make much of a difference on the height. Also, the flat towed vehicle adds no tongue weight so really there should be no sag at all. Even if you did somehow drop 2" after loading your motorhome you would still be in the safe zone, which is +/- 3" from level. If you want to...
    view full answer...
  • Recommended Dual Hitch Adapter and Cargo Carrier for Flat Towing/Carrying Bike Rack and Cargo Carrie
    You can use a Dual Hitch Adapter like # RM-077-2 so you can simultaneously carry a cargo carrier/bike rack and flat tow. There are a couple things to keep in mind, though... Using an adapter will reduce the tongue weight capacity of the hitch by half. Therefore, if the hitch has a tongue weight capacity of 350 lbs, using the adapter will reduce that capacity to 175 lbs. That's not a big deal for the flat towed vehicle, because flat towed vehicles are a rolling load that don't exert any...
    view full answer...
  • How to Carry a Hitch Mount Bike Rack on Motorhome While Also Using a Tow Dolly
    Yes, the Roadmaster Dual Hitch Receiver Adapter, 8" Drop/Rise # RM-077-8 is actually rated for a tow dolly so you can use it for that and a bike rack!
    view full answer...
  • What Size Dual Hitch Adapter Is Needed To Carry A Bike Rack Above The Roadmaster Tow Defender?
    I recommend using the Roadmaster Dual Hitch Receiver # RM-077-8 which separates the receivers 8" from bottom edge to top edge of the different receiver. The Roadmaster Tow Defender # RM-4750 sits roughly 4" above the top edge of the receiver and depending on your bike rack this ensures you have enough room to easily move the screen out of the way to disconnect your flat towed vehicle rather than having to unload the bikes over the front of your flat towed vehicle before you can disconnect....
    view full answer...
  • How to Flat Tow Vehicle and Transport Two e-Bikes Behind Motorhome
    The best way to flat tow your Fiat 500 or Mini Cooper and also transport your two e-bikes is with a Roadmaster Dual Hitch Receiver Adapter like # RM-077-6. This adapter is specifically designed for this application, providing you with a 2 inch receiver on the bottom for attaching a tow bar and an additional 2 inch receiver on top to attach a hitch-mounted accessory like a bike rack. As long as the combined tongue weight of your vehicle and bike rack doesn't exceed the adapter's 400 pound...
    view full answer...
  • Dual Hitch Receiver to Clear 6 Inches for the Back of an RV
    We do have Malone adapter # MPG544 which measures 9 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 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). But these...
    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 for...
    view full answer...
  • Dual Adapter For Flat Towing & Carrying Bike Rack
    While there isn't an adjustable option, there are dual hitch adapters for flat towing that allow you to tow your vehicle and carry a bike rack at the same time. The right one just depends on the amount of rise or drop you need. Also keep in mind the use of an adapter will reduce the tongue weight capacity of your hitch by 50 percent, and that the rise or drop will depend on the way the adapter is turned. - 2" or 4" of Rise/Drop: Roadmaster Dual Hitch Receiver Adapter # RM-077-4 - 2" or...
    view full answer...

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Info for this part was:

Employee Mike L
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Video Edited:
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