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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: $192.98
You Save: $23.38
Hitch Adapters
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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 (97)
  • Q & A (0)
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  • Why etrailer?

Roadmaster Hitch Adapters - RM-077-8

  • Hitch Extender
  • Dual Hitch Adapter
  • Fits 2 Inch Hitch
  • 10-3/4 In 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   (97 Customer Reviews)

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


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

Great. Havent lost the bikes or jeep.
Bob J - 12/27/2021
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.
-- comment by: Patrick W - 07/16/2022


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.


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


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 is a great idea for adding an additional hitch for a bike.


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.


It works well, feel solid. It dropped my tow hitch to the proper level and allows me to have my bike rack on top, all in one.


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.


It arrived quickly and once I picked up a hitch pin, it installed quickly and worked great. It is SOLID, and will work nicely towing my car and bikes.


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

The hitch adapter still works great! No problems at all.
Steve G - 08/19/2021


Received my dual hitch receiver in fantastic condition and time after great customer service! I called to be sure I could get what I needed and all went perfectly. Will be on my RV for my tow vehicle with upper insert holding a dual bike rack for two electric bikes. Florida here we come!


I can tow my tow Dolly and bikes. Highly recommended.


Very heavy - difficult for me with my ruptured discs and osteoporosis to handle! Required my imposing on a friend - but, we got it done. My use is for a lightweight bike rack & light weight bicycle.I understand the need for robustness for towing a car, but the variation for a bicycle rack need not be robust. Every extra pound translates, to some degree, to reduced MPG


The Hitch adapter works great. It lined up perfectly with my Jeep Wrangler w/ 4 inch lift. I’ve used it on my Winnebago mainly for long trips and it is a beast! Tows the Jeep easily.


Excellent product, quick delivery.


It actually ended up being too low to use with my truck. I sold it to a motor home owner. Then bought a 6" drop.

We have an article to help you choose the right High-Low Adapter for your towing setup. I linked it for your convenience.
-- Etrailer Expert Victoria B - 10/06/2020
Ive used it 3 or 4 times towing between Ohio and Florida. It still looks good and does the job.
MARK - 09/19/2021


Bought this to tow our jeep behind the motorhome and and then once settled add the flagpole without having to remove the tow hitch. Works great for us.


It fitted perfectly. I thought I was going to need a longer one but this was exactly right.


Very well built and does a wonderful job of allowing me to tow with my lifted Suburban.

Its still working great. No issues and as stable and strong as when I purchased it.
Rob - 10/13/2021


I received this product in record time. This is a quality product that solved the problem of using both my bike rack and cargo carrier on the back of my RV. I will definitely be visiting for my future needs.

Glad you like the dual hitch adapter! The adapter has a 400 lb tongue weight capacity, which means that the cargo carrier, whats carried on it, the bike rack and the bikes cannot weigh more than 400 lbs. This figure will be lower if the tongue weight capacity of your RV is less than 400 lbs.
-- Etrailer Expert Mike L - 05/13/2018


Handles very well my two bikes on top and car at the bottom


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.

Show More Reviews

See what our Experts say about this Roadmaster Hitch Adapters

  • 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...
  • 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...
    Image 1 for
  • 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...
  • 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...
  • 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...
  • 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
  • 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...
    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...
  • 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...
    Image 1 for
  • 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 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 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...
  • 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...
  • 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...
  • 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...
  • Dual Hitch Extender with Rise and Drop for 2 Trailer Hitches
    I recommend theRoadmaster Dual Hitch Receiver Adapter, 8" Drop/Rise item # RM-077-8. This will give you a 8" rise and a slightly longer extension than the one you currently have at 10 3/4" long. This hitch extender also has a higher max towing capacity at 10,000 lbs.
    view full answer...
  • Adapter that Will Allow Bike Rack to Fit with Tow Bar Setup
    If you used a dual hitch adapter with your flat towing setup like the Roadmaster Dual Hitch Adapter # RM-077-8 you could put your bike rack up considerably higher than your tow bar which would allow you to carry the bike rack without interference.
    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...

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