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Roadmaster High-Low Adapter for Tow Bars - 2" Hitches - 8" Rise/Drop - 10K GTW, 400 lbs TW

Roadmaster High-Low Adapter for Tow Bars - 2" Hitches - 8" Rise/Drop - 10K GTW, 400 lbs TW

Item # RM-048-8
Our Price: $178.29
Accessories and Parts
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Shipping Weight: 23 lbs
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Make up for the height difference between your RV and towed vehicle with this hitch adapter. Provides either an 8" drop or an 8" rise. Solid shank provides strength and durability. 1-800-940-8924 to order Roadmaster accessories and parts part number RM-048-8 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 - 8" Rise/Drop - 10K GTW, 400 lbs TW. Accessories and Parts reviews from real customers.
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  • Reviews (219)
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  • Why etrailer?

Roadmaster Accessories and Parts - RM-048-8

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

Make up for the height difference between your RV and towed vehicle with this hitch adapter. Provides either an 8" drop or an 8" rise. Solid shank provides strength and durability.


  • 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
    • Solid shank for suprerior strength and durability
  • 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: 8"
  • Receiver: 2" x 2"
  • Tongue weight: 400 lbs
  • Gross towing weight: 10,000 lbs
  • Length:
    • 4-1/2" From center of hitch pin hole to angled brace
    • 7-1/4" From center of hitch pin hole to back of receiver tube
    • 10-1/2" From center of hitch pin hole to center of hitch pin hole
  • Limited Lifetime Warranty

Dimension between hitch pin holes is 10.5 inches measured in red

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.

048-8 Road Master Hi-Low Hitch Adapter - 8" - 10,000 lbs GTW; 400 lbs TW

Installation Details RM-048-8 Installation instructions

Customer Satisfaction Score:

Customer Reviews

Roadmaster High-Low Adapter for Tow Bars - 2" Hitches - 8" Rise/Drop - 10K GTW, 400 lbs TW - RM-048-8

Average Customer Rating:  4.9 out of 5 stars   (219 Customer Reviews)

Make up for the height difference between your RV and towed vehicle with this hitch adapter. Provides either an 8" drop or an 8" rise. Solid shank provides strength and durability.


Worked great to level out the connection between our coach with the Blue Ox and the 1983 Jeep CJ7!


Exactly what I was looking for and it arrived in 2 days! Highly recommend E-trailer!


The only thing I have changed is to have an additional receiver welded on top to carry a bike rack. The drop was perfect to tow my 2016 Hyundai Elantra GT


The product solved my problem by lowering the attach height on my motorhome making it level with that on the vehicle being towed.

I feel that the design limit for the torque this attachment imparts on the motorhome trailer hitch exceeds the design limit of the motorhome hitch. A few hard stops seem to have bent the motorhome hitch a little. I am towing a 4k lb vehicle with a 2015 Winnebago Vista.
Walter - 05/21/2017


This adapter was what we needed in ordered to pull our lifted Jeep JKUR behind our coach when traveling. It is well built and heavy duty. We have over 6000 miles of towing with it over the last year and no issues at all.


Although I just needed to shim it up to keep the wiggle down, its doing the trick with the bike rack. Still need to try it out with the camper when I head back out to work.


Heavy duty and does what it’s supposed to.


We’ve used this hitch to pull our Jeep behind our motor home. So far it’s been great.


Awesome awesome awesome.


Everything worked out perfectly


Great service and expertise


E trailer is awesome. We have ordered from you several times. Shipping is fast and the products are exactly what we ordered.


Brought my hitch on my RV up to right height to match my tow vehicle


Just used it this past weekend for first time. It worked great! No problems whatsoever. Drove three hours to the destination and three hours back. Definitely will continue to use. I needed a hitch that was leveled with my tow bars and this was perfect. I would highly recommend etrailer for their excellent products.

Still working great.
Gerardo P - 07/24/2020


Just received the Roadmaster 8" High-Low Hitch Adapter today and the quality looks awesome and etrailer was awesome to deal with super fast shipping and good communications, and I'm sure this is going to work just fine when I get ready to use it thanks etrailer.

Have used this for a year now for my tow car and it works awesome and well built would highly recommend this to anyone needing one.
-- comment by: - 03/04/2014


I use a 4" drop down for my mobility scooter carrier. My SUV hitch was too high to allow me to run the scooter up onto the carrier. The drop down made the carrier hight perfect. The drop down is strong and very stable. Noe I can travel and be moble at my destination.

The down is still meeting my needs and is serving very well.
Clark B - 08/02/2018


Worked perfect


Turned it over and it raises my towbar on the motorhome so I may safely flat tow our Jeep


Needed in a hurry, but did not opt for higher priced shipping. Item was shipped same day, and arrived fast. Very satisfied. I had previously ordered a bike carrier and was pleased to return. Best prices and fasted shipping. Will continue to use for my RV needs.

Great. Adjusted tow height and works fine.
Carl W - 03/24/2015


I have to give it a 5 star being it's pretty simple. The front of my truck is 7" higher than my RV hitch. Truck with my golf cart in the back put me at just over 5000lbs that's why I jumped to the 10,000lb. A massive well built extremely strong looking adapter. The reason I went with a well known name brand is because pulling a pickup truck you have to much at risk and I wanted to be sure this was not going to be the weak link. I'm sure I could drive off a 500' cliff and when the wreckage is cleaned up someone can still use this adapter. It is quiet heavy but so is all the towing parts.


Product was just as advertised and made my Class "C" RV hitch and 4WD towing setup exactly level. Hi/Low Extension was top quality. Very satisfied with the product and prompt delivery. I am a multiple time purchaser through "etrailer" and every experience has been top notch. Seller is highly recommended!! Do note that Hi/Low Extension extended overall tow setup an additional 10" and therefore also required the addition of safety cable extensions and a new longer wiring harness.


Just what I needed - Bought a gently used Blue-Ox tow-bar to pull a recently acquired 1998 Honda Honda CRV with my 2005 Jayco Grayhawk. After installing the CRV baseplate (purchased from etrailer, another great buy, installed myself in about 45 minutes) the vertical alignment of the base plate connections and the RV's receiver hitch was 9-inches off. I found this hitch adapter, it arrived within a few days of ordering even when I ordered it less than a week before Christmas. A test tow around the neighborhood proved all worked and aligned great. etrailer team followed up, provided info on shipping status, all-in-all an excellent transaction.


Just received the order - everything was perfect! Fast shipping and appears to be a great product. Fits perfectly and solves my towing height issue. Being used with Blue Ox products (much less expensive option, and rated for more weight).

Excellent value and customer service (called prior to my order, ordered via web, and received follow up).

Will definitely use them again should the need arise!

One year later and still very happy with my purchase as well as the service I had received. Great stuff!
Tom S - 05/13/2015


Exactly what I needed, had to drop down 8 inches to make tow bar level, very well constructed


This has worked well. Seems well built\sturdy. I needed it to match the bumper height of my lifted Jeep tow bar to my truck hitch. My truck hitch with my camper on was too low. The Jeep came up over the towbar and rear ended my camper after braking for a dip. This hitch makes the truck hitch the same height as the Jeep tow bar connection

Show More Reviews

See what our Experts say about this Roadmaster Accessories and Parts

  • How Level Does Towbar For Flat Towing Vehicle Behind Motorhome Need to Be
    According to Blue Ox and Roadmaster, you want to use a High/Low adapter that would place the tow bar's attachment to the hitch no more than 3 inches above or below level. Anywhere WITHIN that range would be perfectly acceptable.
    view full answer...
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  • Distance from Pin Hole to Back of Receiver Tube
    The distance from the center of the hitch pin that will go into your RV hitch to the back of the receiver tube is right at 7-1/4 inches. I attached a review video for this product for you to check out as well.
    view full answer...
    Image 1 for
  • What are the Dimensions of the Roadmaster 8 inch High - Low Hitch Adapter for Towing My 2004 Jeep
    The length from the center of the hitch pin hole to the angled brace is 4-1/2 inches. The measurement from the center of the hitch pin hole to the center of the receiver pin hole is 10-3/4 inches.
    view full answer...
  • Can High-Low Adapter be Used for Towing a Car Dolly Behind an RV?
    The Roadmaster High-Low Adapter # RM-048-8 is used for flat towing and not for towing a trailer or dolly. Instead you would need to use the hitch on your 2017 Winnebago Vista and the a ball mount with the correct rise or drop.In order to choose the correct ball mount, there are a couple measurements you'll need to take. First, make sure both your Winnebago and the tow dolly are parked on level ground; you'll then want to measure from the ground to the top of your hitch receiver. Next, measure...
    view full answer...
  • Can the Roadmaster High-Low Adapter Be Used with Kuat Bike Rack for Rear Hatch Clearance
    The Roadmaster High-Low Adapter # RM-048-8 can be used with a bike rack. However, 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. For example, if your vehicle's trailer hitch has a tongue weight rating of 350 pounds, when using the high-low adapter, the hitch can only handle 175 pounds of tongue weight. This reduced tongue weight includes both the weight of the rack and the weight of...
    view full answer...
  • How To Determine What High-Low Adapter Is Needed When Flat-Towing
    You want the tow bar to be as level as possible to tow the vehicle safely. To find out what high-low adapters you need to flat tow you can take a couple measurements.You can park the towed vehicle on level ground and then measure from the ground to the bottom of the base plate arms that attach to the tow bar. Then just measure from the ground to the top of the receiver opening on the RV. If the RV receiver is higher as you mentioned, the difference is the amount of drop you will need...
    view full answer...
  • Towing a Trailer with a Coupler that is Higher than the Trailer Hitch on a Jeep Wrangler
    All you need is a ball mount that allows you to tow the trailer level. You can measure for the amount of rise needed to select the correct model. A ball mount with rise is needed when the trailer coupler is higher than the hitch receiver on the vehicle. Have the trailer and the Jeep Wrangler parked on level ground. Disconnect the trailer from the Jeep. Measure from the ground to the top of the hitch receiver opening. Then use the trailer jack to make the trailer level and measure from...
    view full answer...
  • Which High-Low Adapter For Honda Odyssey being Flat Towed Behind 2008 Bounder 35H
    Since ground clearance is limited and the part # RM-048-8 will get you within the 3 inches up and down of being level that would be your best option. I attached a help article on how to pick out the correct high-low adapter as well.
    view full answer...
  • How to Pick Out Correct Rise/Drop Ball Mount to Tow Travel Trailer Level
    Picking out the correct ball mount for a hitch is pretty easy, but it does require you to go with one that will allow the trailer to tow as level as possible. To see how to pick out the correct rise/drop ball mount check out the help article I attached. Basically you measure from top of hitch opening down to ground and then bottom of trailer's coupler lip down to ground and compute difference. Once you figure out how much rise/drop you would need you would want to check out the other...
    view full answer...
  • High Low Adapter for 2014 Winnebago Via 25p Towing Honda Fit
    You would need around a 9 inch drop from a high low adapter for your tow bar to sit level. Since your RV manual states that you can't use more than a 4 inch drop (which is an odd requirement) you should find out if that's for ball mounts or if that's for high low adapters as well. If it's just for ball mounts you could use a # RM-048-8 which would be within an inch of level and would be close enough.
    view full answer...
  • How to Determine Which High/Low Flat Towing Hitch Adapter Is Needed
    So what you'll need to do is determine the receiver height of the motorhome, measure from ground to the center of the hitch pin hole. Then, on the vehicle being towed, measure from the ground to the center of the base plate. If the height of the hitch and the base plate has a difference more than 3 inches, you'll want to use an adapter to bring it within that range. I'll link to an article that explains how to take the measurement, as well as to our selection of high/low adapters.
    view full answer...
  • Can A High-Low Adapter Be Used With A Warn Winch?
    Using a high-low adapter like the Roadmaster High-Low Adapter for Tow Bars - 2" Hitches # RM-048-8 you're interested in is not recommended to be used in that capacity. The reason being is that yes you may retain the full line capacity of your winch if the winch cable remained absolutely level while being used. The reality is that your line is likely not going to stay level while being used and would result in a substantial drop in capacity. Since there is not any real way to determine...
    view full answer...
  • Hitch Adapter Recommendation For Flat Towing
    We do carry adapter bars for the very reason you are experiencing. Many tow systems require an adapter to make the tow bar more level. Normally the safe zone for towing a vehicle is either 3 inches above or 3 inches below. You want to make sure your towed vehicle is absolutely level for safe towing. I recommend the Roadmaster High-Low Adapter for Tow Bars, part # RM-048-8. It has a weight capacity of 10,000 lbs, fits 2 inch by 2 inch receivers, and has a rise/drop of 8 inches. It measures...
    view full answer...
    Image 1 for
  • Better Adapter for Bike Rack for Most Rise
    Between the 8 inch rise of the Roadmaster High-Low Adapter # RM-048-8 and 10 inch rise of the Roadmaster High-Low Adapter # RM-048-10, I recommend going with the adapter that gives you the 10 inches of rise. You are right that this is the slightly longer adapter, but only about an inch and a half longer, and that is not going to cause any added clearance problems. Since your issue is you need to clear the ground just on steeper hills, you are much better off going with what will give...
    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...
  • Options for Carrying a Spare Tire While Flat Towing
    I have an alternate solution for you. It sounds like you have the Roadmaster Hitch Mounted Spare Tire Carrier w/ 2" Receiver Opening # RM-195225 which lowers your hitch receiver 2" and reduces your flat towing capacity to 10,000 lbs. and tongue weight by 33%. Unfortunately, you can not use another adapter like the Roadmaster High-Low Adapter # RM-048-10 (10-1/4" Rise/Drop) in that spare tire carrier hitch receiver. Your best option is going to be to remove the spare tire carrier when flat...
    view full answer...
  • Can the Roadmaster Quiet Hitch Be Used for Flat Towing using a Class IV Hitch and High Low Adapter
    The Roadmaster Quiet Hitch # RM-061 would work great for your application as long as your Class IV hitch and the high low adapter are both 2 inch hitches. The Roadmaster 8 inch high low receiver that we currently have # RM-048-8 is a 2 inch receiver. For your application you might want to consider using 2 of the Roadmaster Quiet Hitches, one for the receiver at you truck and one for the receiver on the adapter. For your reference I have also included a link to a helpful article that...
    view full answer...
  • Availability of Hitch Extension To Keep Pickup From Hitting RV When Being Flat Towed
    The Roadmaster High-Low Hitch Adapter, part # RM-048-8, will extend the truck further away from the RV, but it will also change the height of your tow bar connection. It has a 8 inch rise or drop which will either raise or lower the tow bar connection of your pickup to the RV. If you have a level connection now you will not want to use the # RM-048-8 to extend your vehicle away from the RV. The end of the tow bar that attaches to the base plates on the vehicle should not exceed a rise...
    view full answer...
  • Anti-Rattle Recommendation for Use with High-Low Adapter While Flat Towing
    You definitely can use 2 anti-rattle devices when flat towing with the Roadmaster High-Low Adapter # RM-048-8. I recommend using 2 of the Roadmaster Quiet Hitch # RM-061 because it was made specifically for this type of application and is used to essentially clamp down on the shank of the adapter as well as the shank of the tow bar. I have attached a review videos of the Quiet Hitch for you to check out.
    view full answer...
  • Tow Hitch Mount Bike Rack with Good Ground Clearance for a 2011 Mazda CX-7
    The Swagman Trailhead # S63365 would be a great option for you. This bike rack has a rise in the shank for added ground clearance. I have included a link to the right to a video review (of the 4-bike version) for you to view.
    view full answer...
  • Can a High-Low Trailer Hitch Adapter # RM-048-8 be Used To Raise up a Cargo Carrier
    The Roadmaster High-Low Hitch Adapter, # RM-048-8, is only designed for tow bar applications. I do have another, more cost effective solution. You could use the Curt Multipurpose Ball Mount, # D210. Though it is designed to tow while carrying a cargo carrier or bike rack, you can use it to just carry a cargo carrier. The rise on the receiver is not as high as the High-Low adapter, but the receiver portion has a 350 lb tongue weight.
    view full answer...
  • Recommended Adapter For Greater Ground Clearance For Bike Rack On 2016 Honda Odyssey
    For your bike rack on your 2016 Honda Odyssey, I recommend the Curt Dual 2" Receiver Tube Adapter, 8" Extension # D-192. This is rated for up to 350 lbs tongue weight but will reduce your trailer hitch tongue weight by up to 50%. So in most cases for a Class III hitch that reduces your total to 250 lbs tongue weight with will be fine for a bike rack. This gives you the option to tow a small trailer as well. High-Low adapters can be used for bike racks but they also reduce the hitch...
    view full answer...
  • Is It Okay for Tow Bar To Be Higher Off Ground If Level
    The important thing is that the tow bar stays level, or more specifically stays within the "Safe Zone" which is 3 inches above or below level. As long as you are able to get the curved tow bar within this range with the height of the hitch ball on your RV the actual height is not a big deal. To do this you will most likely need a high-low adapter like the Roadmaster # RM-048-8 on the RV. I have attached a great article that explains exactly how to choose the correct one for your setup....
    view full answer...
  • Low Hanging Front Mount Hitch Recommendation for a 2013 GMC Sierra 2500HD
    You can use a high low adapter like part # RM-048-8 to lower the hitch opening but you should note that it will lower the capacity of the hitch by 50 percent. I attached a picture of the Curt Hitch part # C31023 installed and you can see it sits a bit closer to the ground. This might be your best option since it wouldn't require the use of the high low adapter.
    view full answer...
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