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Roadmaster High-Low Adapter for Tow Bars - 2" Hitches - 4" Rise/Drop - 6K GTW, 200 lbs TW

Roadmaster High-Low Adapter for Tow Bars - 2" Hitches - 4" Rise/Drop - 6K GTW, 200 lbs TW

Item # RM-070
Our Price: $80.93
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Shipping Weight: 13 lbs
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Make up for the height difference between your RV and towed vehicle with this hitch adapter. Provides either a 4" drop or a 4" rise for high or low ground clearance. Hollow shank is lightweight. 1-800-940-8924 to order Roadmaster accessories and parts part number RM-070 or order online at Free expert support on all Roadmaster products. Great prices and Fastest Shipping for Roadmaster High-Low Adapter for Tow Bars - 2" Hitches - 4" Rise/Drop - 6K GTW, 200 lbs TW. Accessories and Parts reviews from real customers.
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  • Reviews (181)
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Roadmaster Accessories and Parts - RM-070

  • Tow Bar
  • Hitch Adapters
  • High-Low Adapter
  • Roadmaster
  • 4 Inch Rise/Drop
  • Fits 2 Inch Hitch

Make up for the height difference between your RV and towed vehicle with this hitch adapter. Provides either a 4" drop or a 4" rise for high or low ground clearance. Hollow shank is lightweight.


  • Allows for proper positioning of tow bar
    • Makes up for height difference between RV's hitch and towed vehicle's base plates
    • Also lets you mount a bike rack, cargo carrier, or other 2" hitch accessory
  • Provides either drop or rise for adequate ground clearance
  • Constructed of sturdy steel
    • Hollow shank is lightweight
  • Resists rust and corrosion with black powder coat finish
  • Hitch pin and clip or hitch lock sold separately
  • Made in the USA


  • Application: 2" x 2" trailer hitch receivers
  • Drop/rise: 4"
  • Receiver: 2" x 2"
  • Tongue weight: 200 lbs
  • Gross towing weight: 6,000 lbs
  • Length:
    • 6" From center of hitch pin hole to angled brace
    • 10-1/4" From center of hitch pin hole to center of pin hole
  • Limited Lifetime Warranty


Note: This adapter is designed to flat tow a vehicle only. Do not use to tow a trailer. When using with a hitch-mounted accessory, such as a bike rack or cargo carrier, the tongue weight of your hitch will be reduced by at least 50 percent.

Most tow systems require some sort of hitch accessory to either raise or lower the tow bar to an appropriate level. The "Safe Zone" for a motor-home-mounted tow bar ranges from 3" above level to 3" below. Car-mounted models must be absolutely level. This high-low adapter can provide you with the necessary drop or desired rise to achieve a level tow bar setup.

070 Road Master Hi-Low Hitch Adapter - 4" - 6,000 lbs GTW; 200 lbs TW

Installation Details RM-070 Installation instructions

Customer Satisfaction Score:

Customer Reviews

Roadmaster High-Low Adapter for Tow Bars - 2" Hitches - 4" Rise/Drop - 6K GTW, 200 lbs TW - RM-070

Average Customer Rating:  4.9 out of 5 stars   (181 Customer Reviews)

Make up for the height difference between your RV and towed vehicle with this hitch adapter. Provides either a 4" drop or a 4" rise for high or low ground clearance. Hollow shank is lightweight.


The tow bar rise extension was exactly what I needed to raise up the attachment point for my Roadmaster Falcon All-Terrain tow bar when pulling my Jeep Wrangler. Perfect fit and finish.



The riser is working great. I did add two hitch quietner U-bolts to keep the angle appropriate and to keep the connections from rattling. It is a great setup and I am super pleased with it.


Good quality, perfect fit, didn't have to modify anything!


Just as advertised. New tow vehicle is higher than the original tow vehicle, therefore required a riser to tow properly. This fit my needs. eTrailer provided excellent help and shipping was prompt. I am a repeat customer and will purchase other items when other needs arise.


Item worked great on my JK Wrangler to connect my Thule bike rack. Customer service was top notch!!!


I bought this in order to extend and lower a Thule T2 bike rack away from the spare tire on the back of a Jeep Wrangler.

The stock hitch mount location left the bike rack in the way of the spare tire when trying to fold the rack into the up position - and when lowering the rack to gain access to the rear of the vehicle.

This hitch extension gave me the perfect amount of clearance to implement all of the rack's operating positions. It's extremely well-made and super-duty. It's probably overkill for what I'm using it for, but I wanted the peace of mind that my rack and bikes were riding extra safely.

I was a bit worried that lowering the hitch would give me ground clearance issues, but those fears were unfounded. I still have plenty of room under there, and I can cross steep rail crossings without anything dragging.

For added peace of mind, I also ordered the anti-rattle lock (part #63232) and the quiet hitch (part # RM-061). The anti-rattle lock keeps this extension from being stolen. It also eliminates any side to side movement the extension has in the hitch.

The anti-rattle lock cuts down on almost all movement of the extension in the hitch; however, there was still a small amount of up and down movement. With the combination of the lock and the quiet hitch, the connection feels like it's welded on. If I was strong enough, I could lift the entire Jeep off the ground with this thing!

I'm really satisfied with the setup.



Thad,I recently got the 6 for my 2015 Wrangler, same reasons as you mentioned.Not knowing anything about TW, I didnt consider this in the purchase maximum 100 Lb. The Thule T2 is a pretty hefty rack and with 2 Mountain bikes on it, I would say its around 80-100 Lbs.Have you had any problems?When I sent in my review is when they cautioned me.



Jeff, I have had zero issues with this extension or the Thule T2. My friends and I ride fat bikes. If youre familiar with them, theyre quite a bit heavier than a regular mountain bike. Ive had two fat bikes on that rack setup on many occasions. No problem.

Etrailer Expert

Rachael H.


Thanks for your follow up, but I would like to remind you that you will want to make sure that with your bikes loaded you will want to be within the tongue weight capacities of this high low adapter. Jeff, the Roadmaster High-Low adapters come in 2 different tonge weight capacities, you might consider the higher option that allows up to 400 pounds of tongue weight. These higher tounge weight capacity adapters have a solid shank which gives it the higher capacity, and the option with the same 4 inch drop would be RM-048-4.


Quality construction and it lowers the reciever to the correct height for my tow car. I would recomend this product.


The offset hitch is everything that it was advertised to be. I am offsetting my hitch up and around the bumper on my motor home. The extra long 4" offset hitch worked perfect. Now the hitch is level with the tow bar on my Jeep. The delivery was fast and customer service was friendly.

Kelly G.


I am very satisfied with the products I have purchased from etrailer. They are performing like new. I am especially pleased with the etrailer customer service and follow-up. Your business should always have success with that good attitude towards customer satisfaction.


Needed to raise the blue ox tow bar on the RV to match the height of a new Wrangler JKU. This did the job perfectly without being too expensive.



Still a 5 star in my book - does great.


Item as described, works perfectly. Discovered I was going to be gone from home after I'd ordered this - talked to etrailer before it had actually shipped - they were able to re-route it to my destination, which is where I was needing it!



The products continue to perform well. Thanks for the follow up!


Needed to drop the tow bar to match the new vehicle level for better tow control.
Every thing we use is Roadmaster it works the best.

Thomas G.


Not as many trips due to COVID but have pulled the tow car around for about 4000 miles and it works perfect.


Purchased this to tow my Jeep behind my motorhome. Need the drop to properly align the towbar. Shortly afterwards, I lifted the Jeep and changed the front bumper. This unit was no longer needed. Only used it maybe twice.

With that said, it appears well made. Very strong and capable.

Only suggestion. I would like it to have more than one pin hole so it can be set farther into the receiver.


Had ordered a different hitch riser that wouldn't work because of the bumper on the motorhome, returned it and ordered one that Lindy A suggested. It just arrived about an hour ago , l put it on and everything is good.
Thanks so much for your help, never seem to go wrong dealing with you guys,
Thanks again

Dave B.


It was good, since then we have changed motorhomes and cant use this one anymore, not tall enough, but when we used it, it performed as expected


This product worked perfectly for towing my Corolla behind my RV using the Blue Ox

This worked perfectly for towing my Corolla behind the RV using the Blue Ox Alpha tow bar. There were no problems with hole alignments.


My Class B+ needed a rise of 4" to be within the 3" out of level spec for my Ranger. It does it's job--however it also moves my Roadmaster All Terrain towbar back about 11". The towbar sticks out back a lot and I was concerned the car behind me might hit it without a towed being hooked up. It may affect the "tail wagging the dog" a bit when the Ranger is in a rut and the RV isn't. I could shorten that distance by drilling new pin holes, but Roadmaster said NO!


This hitch was the perfect match for my
tow bar. Everything is level
And works perfectly.


Just received and installed. Untested, however. A bit of wobble noted between the stinger and receiver hitch interior Looks like a well built item and will allow me to bring my tow bar into the + or - 3" from level as per Roadmaster specs. Shipping was quite fast, even arrived a day earlier than promised w/o excuses as to conflicting with Thanksgiving holiday and/or black Friday, et al. Contact person at etrailer, George, was right on top of things and communicated via email which was much appreciated so I didn't have to guess about when shipped, etc. I really like these etrailer guys, my third purchase and it won't be my last. Oh yeah, no sales tax for us in California.


Have a lifted jeep wrangler and need to raise the hitch to keep the tow bar level. This is the perfect hitch for my needs. The offset on the hitch helped me clear the bumper on my RV as my receiver is set-back under the bumper. Would recommend this product for Nemar RV owners that need to raise their hitch.


etrailer was recommended to me by another RV'er. After talking with Paula S I can fully understand why the company was recommended. She was very helpful and knowledgeable concerning my questions. The product I ordered, a high/low hitch receiver for my motor home, arrived promptly and was exactly what I needed.
It appears customer service is a big priority to them. Highly recommend.


The RoadMaster drop down hitch would simply not fit my towbar. The towbar was not unique in the 2” hitch fitting as I confirmed with BlueOx and it fit the hitch on my RV just fine. The Roadmaster drop down hitch would fit my RV 2” hitch fine but the side for the towbar just would not budge. Once eTrailer Customer Service understood the issue they promptly sent me a pre-paid return label and provided a full refund. I believe the issue was a manufacturer defect. Very impressed with etrailer Customer Service and extremely happy with the return and refund process! Outstanding Customer Service and I would definitely buy from them again in the future.


Purchased items were delivered as promised and received in good condition. All worked perfectly as needed. After wiring a car to be pulled by a motor home, I found out a converter and two additional diodes were needed to make the lights function as needed. All are now installed and am very pleased with the outcome. Will have no problem with my next purchase ordering from etrailer.


RoadMaster High-Low Drop - 4" - 6,000 lbs GTW; 100 lbs TW. Bought this to help raise our hitch so that the piece of equipment we need to haul weekly did not drag. It does exactly what it said it would do and more. It also gives us enough room to be able to open the hatch of our vehicle. It's exactly what we needed. The company who installed our hitch said no one made something like this. How wrong they were! Great product.


I needed this to ensure that the tow bar was within the specified +/- 3" height delta that Blue Ox recommends for their tow bar setups. The welds are solid and the finish is good.


Drop down adapter allows tow bar when towing car behind the motorhome to remain as same height as the hitch on the motorhome.


perfect. lowered my hitch mount bike rack so my Wrangler back door can swing open freely with rack mounted.


etrailer comes through with a great selection of options for drop hitches at competitive prices. And they even upgraded the method of shipping I chose so I got my hitch faster than expected.

Show More Reviews

See what our Experts say about this Roadmaster Accessories and Parts

  • How to Adjust Hitch Height of RV To Allow Vehicle to Flat Tow with Tow Bar Level
    Sounds like what you are looking for is a high low adapter like part # RM-070 which will allow you to raise or lower the hitch height by 4 inches. I also attached a link below that shows how to pick out the correct high low adapter as well.
    view full answer...
    Image 1 for
  • 2007 Lincoln Navagater to carry a power chair on carrier about 420 Lbs
    You are correct. The RoadMaster 4 Inch Hi-Lo Drop, part # RM-070 is meant for use with a tow bar used for towing a vehicle. It is meant to tow a rolling load, not a situation where more than 100 lbs of downward force is applied to it.
    view full answer...
  • How Much Length Will the RoadMaster High-Low Drop # RM-070 Add to Flat Towing Setup
    The RoadMaster High-Low Drop # RM-070 would extend your tow bar out about an additional 10 inches. If you don't need the additional drop of 4 inches then this adapter wouldn't be needed as it is not a requirement for flat towing a vehicle. If you did need it the additional length wouldn't be too big of a deal. When you are already flat towing a vehicle behind your RV what's another 10 inches? I attached a picture that shows this adapter being used to flat tow a Mazda Miata.
    view full answer...
    Image 1 for
  • Tongue Weight Capacity of RoadMaster High-Low Drop Adapter # RM-070
    When you have all 4 wheels of the toad on the ground, the tongue weight is next to nothing. The 200 pound rating does account for sudden but brief increases in tongue weight such as bumps in the road. The idea of using a high-low adapter like # RM-070 is so that the tow bar is level. A level tow bar means the tongue weight will be low.
    view full answer...
  • How to Measure to Determine the Right High/Low Adapter Needed to Flat Tow a Honda Fit Level
    To determine which hi/low adapter is needed when flat towing your Honda Fit you will first need to have both the vehicle and the RV parked on level ground. On the RV, measure from the ground to the top of the receiver opening on the trailer hitch. Then on the Fit, measure from the ground up to the center of the base plate brackets the tow bar attaches to. The RV is likely higher so the difference in height is the amount of drop you will need. Most tow bars can be mounted within a 3 inch...
    view full answer...
  • 4 Inch High-Low Drop used with Cargo Carrier
    I would not use part # RM-070 with your cargo carrier. It is meant for use with a towbar while towing a vehicle on all 4 wheels and does not have a weight capacity suitable for cargo carriers. The part that would work for your application is part # V75090. It has a tongue capacity of 500 pounds, meaning that the total weight of your cargo carrier and cargo cannot exceed 500 lbs. It will provide 6 inches of rise to get your carrier away from the exhaust.
    view full answer...
  • High Quality Hitch Lock with 4 inch Span that Can be Keyed Alike
    For a high quality set of two hitch locks that have the span you need and are keyed alike the Roadmaster Hitch Lock for 2" Hitches # RM-316 would be what you'd want. These have a 4 inch span and a lifetime warranty.
    view full answer...
  • Can Roadmaster High Low Adapter with Lower Capacity that Tow Bar Be Used Safely
    As long as the tow bar and high-low adapter are rated for at least the weight of the vehicle you are flat towing you'd be fine with one being rated for less weight. So if the 4 inch high-low adapter part # RM-070 will allow your to tow your Colorado level and the vehicle weighs less than 6,000 lbs this would be a great solution that would be perfectly safe. From what I was able to find your Colorado would weigh at most 4,520 lbs so you'd be fine.
    view full answer...
  • Will 2-Bike Bike Rack with Hitch Adapter Clear Bumper on 2013 Kia Sportage
    Most likely you will have plenty of bumper clearance when using a two-bike bike rack with your Kia Sportage, Curt hitch and Roadmaster adapter. But there is an easy measurement you can take to make sure. All you have to do is measure from the center of the hitch pin hole on the adapter straight back to the distance required to clear the rear bumper. I have included a link to an FAQ article that will help. If the distance that you come up with is less than the distance from center of the...
    view full answer...
  • 4 inch High Low Adapter with More Length than # RM-048-4
    The part # RM-070 has a distance of 6 inches from the pin hole to the angled bracket and has the 4 inches of rise/drop you need so it would be a great solution.
    view full answer...
  • Will Roadmaster High-Low Adapter # RM-070 Work with Falcon All-Terrain Tow Bar and Tow Defender
    The Roadmaster High-Low Adapter, part # RM-070, is designed for use with a tow bar only. It will work with the Roadmaster Falcon All-Terrain Tow Bar, part # RM-522, you have referenced. This adapter is meant to be used when towing a rolling load on four wheels so it will not encounter any tongue weight or downward force of over 100 lbs. The tongue weight you will have on the adapter when towing a vehicle with the four wheels down will mainly be the weight of the stinger that is inserted...
    view full answer...
  • 4 Inch High/Low Adapter Recommendation for a 2001 Fleedwood Bounder Towing 2013 Honda Fit
    I would go with the 4 inch drop like the RoadMaster High-Low Adapter part # RM-070 that you referenced for your 2013 Honda Fit being towed by a 2001 Fleetwood Bounder Class A motorhome. That would put you withing a 1/2 of an inch of being perfectly level and I believe would be your best option without breaking the bank on a 3 inch drop adapter like the Blue Ox High-Low Adapter # BX88235.
    view full answer...
  • Hitch Extension Recommendation for Clearing Spare Tire of 2012 Jeep Wrangler with Bike Rack
    Since your 2012 Jeep Wrangler would have a 2 inch hitch the adapter you'd want is the Roadmaster part # RM-070 instead as the one you mentioned is for a 2-1/2 inch trailer hitch. Then for a locking anti-rattle device we have the Anti-Rattle Device part # 63232 which would work well. It's a lock that holds the shank of the adapter tight to the hitch tube to prevent movement.
    view full answer...
  • Dimensions Between Hitch Pin Holes on Roadmaster 2 Inch Rise/Drop Adapter # RM-072-2
    The Roadmaster 2 Inch Rise/Drop Adapter, part # RM-072-2 and the Roadmaster 4 Inch Rise/Drop Adapter, part # RM-070 has a measurement of 10-1/4 inches between the center of both hitch pin holes. So if you measure on your hitch receiver from the center of the hitch pin hole out to the rear of the vehicle, the measurement listed above will give you an idea of how far out the adapters will be from your hitch receiver.
    view full answer...
  • Hitch and Ball Mount Recommendation for a 2008 Nissan Rogue
    For your 2008 Nissan Rogue I would recommend a Class III hitch like the Draw Tite Hitch part # 75902 as it would have plenty of capacity for towing your trailer and would give you greater flexibility for future hitch accessories like bike racks or cargo carriers. Since you wanted to do some towing you might be interested in etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise or 2 inch drop and one with a 2-3/4 inch rise or 4 inch drop. It also includes...
    view full answer...
  • Kuat Sherpa Bike Rack Partially Melted from Exhaust When Folded
    You could use an adapter like the Roadmaster # RM-070 to achieve a 4 inch rise, which would work pretty well for you. Keep in mind that using an extender/adapter like this will lower the tongue weight capacity of the hitch by 50% due to the fact that the adapter would move the load further away from the vehicle and exert additional leverage on the hitch and its attachment points to the vehicle.
    view full answer...
  • Is Hitch Pin and Clip Included with Roadmaster High-Low Adapter RM-070
    The Roadmaster High-Low Adapter # RM-070 does not come with a hitch pin and clip or lock. It is sold separately. For a pin and clip, you can use part # PC3, or for a lock, we have part # RM-315 for a single lock, or part # RM-316 for a pair of locks.
    view full answer...
  • High-Low Adapter to Tow a Mini Cooper Behind a Motor Home
    Most tow bars have a certain range in which they can work. That range is usually 3 inches off from level. A 6 inch drop would get you as close to level as you are going to get which is great. There is a chance that because the base plate connections on the Mini are so low that you could end up making contact with the ground and the adapter on uneven terrain or steep grades but for the most part in everyday towing situations it would not be a problem. What you could do is use an adapter...
    view full answer...
  • Ball Mount For A Trailer That Has 4 Of Rise
    Since high-low adapters, like the Roadmaster High-Low Adapter for Tow Bars # RM-070 cannot be used to tow a trailer, I recommend getting a different ball mount to compensate for the needed 4" of rise. You can use the Curt Ball Mount for 2" Hitches # D-28, which offers 4" of rise, and 6" of drop, measures 14-1/4" long, and has a maximum weight capacity of 6,000-lbs.
    view full answer...
  • Availability of Hitch Adapter With a 4 Inch Rise That Will Fit a Thule Bike Rack
    You can use the Curt Multipurpose Ball Mount, part # D210, with a Thule bike rack that fits a 2 inch receiver. The ball mount receiver has a high enough tongue weight capacity at 350 pounds to handle the weight of the rack plus the bikes, and the drawbar has a total tongue weight capacity of 750 pounds. It will provide a rise of 4-3/4 inches above the top of the receiver opening on the hitch. It will help with bottoming out on vehicles that have low ground clearance.
    view full answer...
  • Recommended Adapter for Ground Clearance of Bike Rack
    The Curt Dual 2" Receiver Tube Adapter, 8" Extension # D-192 will work well to give you the extra height you desire but using any adapter will reduce your hitch tongue weight by 50%. This won't be an issue with a Curt Class III hitch is you just use your Ridgeback # Y02457. A similar option for more height is the Malone 2" Dual Purpose Hitch Receiver # MPG544 but it will also extend the length of the hitch 2-1/2 more inches than the # D-192. This will probably result in the adapter...
    view full answer...
    Image 1 for
  • Availability of a Hitch Adapter that will Give 4 Inches of Rise
    You can use the Curt Multipurpose Ball Mount, part # D210. It will provide a rise of 4-3/4 inches above the top of the receiver opening on the hitch. This should provide you with the additional height you need, plus the ball mount receiver has a high enough tongue weight capacity at 350 pounds to handle the weight of your sign pretty easily. You should note that when you use any type of adapter or extender you cut the tongue weight capacity of the hitch in half. So whatever the capacity...
    view full answer...
  • Recommendation to Gain Ground Clearance When Carrying a Scooter Carrier and Scooter
    What I would recommend is the Curt MultiPurpose Ball mount part # D210. This product will give you 6 inches of rise for your carrier without cutting the tongue weight of your hitch in half like most hitch extenders do. Check out the review video I attached for this product.
    view full answer...
  • Need Cargo Carrier That Sits Far Enough Away From Dual Exhaust on 2013 Jeep Grand Cherokee
    I recommend taking a look at the 24x60 etrailer Cargo Carrier, # 398874. This carrier has a shank rise of 2-1-2 inches and the closest edge of the carrier will sit 19-1/2 inches from the bumper of your 2013 Jeep Grand Cherokee. If you feel that this carrier will still sit too close to the dual exhaust on your Cherokee, you could use the Curt Dual 2 inch Receiver Tube Adapter, # D-192, which will raise the carrier 5-1/4 inches and push it 8 inches further away from the vehicle. Please...
    view full answer...

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