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Blue Ox High-Low Adapter for Tow Bars - 2" Hitches - 4" Rise/Drop - 6-1/2" Long

Blue Ox High-Low Adapter for Tow Bars - 2" Hitches - 4" Rise/Drop - 6-1/2" Long

Item # BX88129
Our Price: $76.99
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Achieve the proper height for your tow bar setup with this drop/rise hitch adapter. Provides either a 4" rise or a 4" drop to make up the height difference between your RV and towed vehicle. Rated at 5,000 lbs. Pin and clip included. 1-636-306-4830 to order Blue Ox accessories and parts part number BX88129 or order online at Free expert support on all Blue Ox products. Great prices and Fastest Shipping for Blue Ox High-Low Adapter for Tow Bars - 2" Hitches - 4" Rise/Drop - 6-1/2" Long. Accessories and Parts reviews from real customers.
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  • Reviews (80)
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Blue Ox Accessories and Parts - BX88129

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

Achieve the proper height for your tow bar setup with this drop/rise hitch adapter. Provides either a 4" rise or a 4" drop to make up the height difference between your RV and towed vehicle. Rated at 5,000 lbs. Pin and clip included.


  • Allows for proper positioning of tow bar
    • Makes up for height difference between RV's hitch and towed vehicle's base plates
  • Can be used in either rise or drop position
  • Constructed of sturdy steel
  • Resists rust and corrosion with durable powder coat finish
  • Includes pin and clip for attachment to trailer hitch
  • Made in the USA


  • Application: 2" x 2" trailer hitch receivers
  • Rise/drop: 4"
  • Receiver size: 2" x 2"
  • Maximum weight capacity: 5,000 lbs
  • Maximum tongue weight capacity: 500 lbs
  • Length (pin hole to pin hole): 7-3/4"
  • Pin hole diameter: 5/8"
  • 1-Year warranty


Note: Designed for flat towing only. do not use to tow a trailer.

Many tow systems require some sort of hitch accessory to either raise or lower your tow bar so that it sits level. to determine if your setup needs an adapter, hook the tow bar up to your rv and towed car and measure to see how close to level it is. The "safe zone" for a motor-home-mounted tow bar ranges from 3 inches above level to 3 inches 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.

BX88129 Blue Ox Hi-Lo Drop Receiver - 4" Drop/Rise

Installation Details BX88129 Installation instructions

Customer Satisfaction Score:

Customer Reviews

Blue Ox High-Low Adapter for Tow Bars - 2" Hitches - 4" Rise/Drop - 6-1/2" Long - BX88129

Average Customer Rating:  4.8 out of 5 stars   (80 Customer Reviews)

Achieve the proper height for your tow bar setup with this drop/rise hitch adapter. Provides either a 4" rise or a 4" drop to make up the height difference between your RV and towed vehicle. Rated at 5,000 lbs. Pin and clip included.


I put a tlr hitch on my 2019 Kia Sorento which has a towing ability of 5000 lb w/ 500 lb tongue wt. In pic 1 you can that center of gravity has to be raised, which the Pic #2 shows. I have two trailers with different ball sizes.Pic #3 shows the double ball mount extension with a 1 7/8” & 2” ball to complete the install to have the trailers level with the car plane.

The High-Low adapter is meant for flat towing only, and isnt designed for use towing a trailer. Youd be much safer using a ball mount with the equivalent 4 inch rise like # C45070
Curt Ball Mount for 2" Hitches - 4" Rise, 6" Drop - 9-1/4" Long - 7,500 lbs
and the appropriate trailer ball like # C40051
1-7/8" Hitch Ball - 1" Diameter x 2-1/8" Long Shank - Stainless Steel - 3,500 lbs
for a 1-78 or # 63845
2" Hitch Ball - 1" Diameter x 2-1/8" Long Shank - Chrome - 7,500 lbs
for a 2 inch ball.
-- Etrailer Expert Mike L - 10/12/2022


I did some research ,I was having trouble with my jeep zj that I had put a 3.5 inch lift on and when I towed it behind our bus it would swerve back and forth it was a bit unnerving so I got a raised high low hitch from etrailer and that solved the problem pulls straight and true now.


Bought this high/low adapter to level out a cargo trailer, works great, easy to use


Just what I was looking for, my hitch on my jeep was way to high for my bike rack and my Fat Tire e bike worked out just Right.


This product works perfectly on my 2014 Sahara JKU. The low receiver allows my Thule Apex Swing bike rack to clear the Nitta Ridge Grappler 265/70/R18.
Originally an 8” hitch extender gave the rack clearance but it was too high to allow the back to open when the rack was opened.

I’d recommend a locking hitch pitch with anti rattle too.


Great service fast delivery


Needed a drop hitch to stay within specs with my Blue Ox flat tow system. Shipped in three days with new clips. Will be put to the test this Memorial Day weekend.


Worked perfectly! Leveled out my tow ba r!!


Excellent service and prices. Speedy delivery. My Blue Ox towbar is now level and ready for towing the car on our next trip!

After one year no problems. Excellent product and service from eTrailer as usual.
Stephen - 05/24/2020


the blue ox drop down adapter was perfect for the rear mounted hitch receiver on my camper. due to the configuration of my bumper, i had to install the hitch receiver 16" behind the bumper and the Blue Ox drop down adapter provided the clearance under the bumper to extend the receiver to the spare tire.


The tow bar will and does work well for hauling the power hair on the carrier.


The adapter is extremely well built. The welding of the seams has an excellent welding bead. Exactly what I was looking for. The 5/8" pin was included but the clip for securing the pin was missing. No problem because I was going to substitute a locking pin anyway. The product was delivered to the wrong address in our community of 2400, but the honest resident redelivered it to me. The directional of our address was NW but it should have been SW.


Its steel. fits like a glove and will solve my tow bar to receiver height difference.
Two reasons i bought from etrailer, was PRICE and AVAILABILITY. I called around my town to find the same adapter and no body could get one for two weeks and price was well over 40.00 more than i paid here.

I ordered on a Thursday afternoon and BOOM it was here Monday on time.

still works perfect. NO RUST
Robert - 03/26/2020


This hitch adapter is really well built and very reliable. The spacing is great and is the perfect solution to give a bit more clearance for a bike rack or storage box.


Wow, order shipped within a couple of hours of order. Arrived 2 days later. Great products and customer care.


Blue Ox makes great products, I had to replaced this tow extension because the last one was stolen. Also etrailer has been fantastic in everything I have ever purchased with them, quick to ship, great customer service


I’ve looked everywhere for these products and etrailer was not only the only ones with them but the price was good and I received them in 3 days! I am a returning customer and will most likely be returning again!!! Thank you

Excellent, very happy
Thomas - 12/19/2020


Great products, at good price and great service


So far I have purchased Air Force One braking system, tow bar, And now a hi low hitch adapter. Each order arrived promptly and was well packed so no damage. The staff has been great to work with.


New RV needed longer drop to connect toad to Blue Ox tow bar. Wanted to stay with same brand adapter. Fast delivery. Have not attached yet but am sure it will work just fine. Previous 2" Blue Ox adapter worked great.


Once again excellent service and fast shipping. Thanks


Very well made..heavy duty!

product will compliment my existing Blue Ox Towing set up. It will allow me to drop the tow bar 4" and will provide a much better angle on the tow bar.

Pricey, but worth the money.


Ordered this 4 inch step-down hitch to use to safely tow my car behind my Motorhome. It fit great both with the Motorhome hitch receiver and the Tow Bar connection.


This is exactly as advertised. Simple, and efficient. It does the job described. It allows me to use my Blue ox tow bar to pull my Honda Fit with my Class C RV! What is EXCELLENT is the service provided by etrailer. The product is what they said, delivered faster than promised and already in use. Thanks guys! (& gals)


Well built

Show More Reviews

See what our Experts say about this Blue Ox Accessories and Parts

  • Will High/Low Adapters Change Hitch's Capacity
    Any towing system will only be as strong as its lowest rated component. Many high/low adapters are designed for rolling loads only, like flat towing a vehicle behind a motorhome. They'll have a fairly high towing capacity, but a rather low tongue weight capacity. The Blue Ox # BX88129, for instance has a 5000 lb towing/ 500 lb tongue weight capacity. It's rated for flat towing only, not for towing a trailer. If you can tell me what you're wanting to use the high/low adapter for, and what...
    view full answer...
  • Length of Blue Ox High-Low Adapter
    The Blue Ox high-low adapter, part # BX88129, is 7-3/4 inches long from one pin hole to the other so it's going to add 6-1/2 inches between the motorhome and your toad.
    view full answer...
    Image 1 for
  • Are There Any Negative Effects of Having High-Low Adapter with Larger Drop Dimension
    Getting your towed vehicle to be as level as possible is more important than any added torque or stress that might be put on a high-low adapter that features more of a drop. A really important factor to keep in mind for your application is that a flat towed vehicle puts very little tongue weight onto the hitch of your RV, much less so than a traditional bumper pull trailer. Because of this there is virtually no negative effect of a larger drop high-low adapter compared to one with a smaller...
    view full answer...
  • Is One Inch Height Difference Between Tow Bar Base Plates and Receiver on Tow Vehicle Acceptable
    Honestly, if it's a receiver mounted tow bar, any height difference between 1-3 inches is just fine, no worries either way. For a trailer, we typically say it'be better to be a little lower than high, but because a flat towed vehicle is a rolling load that doesn't apply much of any downward force, it doesn't really matter as long as the heights are within 3 inches of level. If it's a car-mounted tow bar you'd be better an inch low. I've linked you to some helpful articles about flat towing...
    view full answer...
  • Will I Need a High/Low Adapter to Flat Tow?
    There is no cross reference data to tell you what might be needed to match these two vehicles up. Fortunately it is simple to determine what size you need. When your coach and towed vehicle are hitched together on level ground, the tow bar should be within 3” of level, otherwise you will need to add a High-Low Adapter. I have attached a document that explains how to make that measurement and another link that has a complete list of our high/low adapters. Most users are very close to level...
    view full answer...
  • Does the Pin Hole of Blue Ox High-Low Adapter for Tow Bars Match Hitch Pin Hole
    Yes, the pin hole of the Blue Ox High-Low Adapter for Tow Bars # BX88129 was designed to match up with the hitch pin hole of your trailer hitch.
    view full answer...
  • Typical Professional Installation Time for Blue Ox Base Plate Kit # BX3788 on 2015 Toyota Corolla
    I am not trying to avoid directly answering your question but the exact amount of time needed to complete a base plate installation on a vehicle can vary quite a bit. The particular equipment on a vehicle, the installer's experience and even the nature of the equipment in the shop can have an effect on the time required. Even with a well-qualified shop and technician, if it is the first time a particular base plate kit has been installed on a particular car, it will take longer than if...
    view full answer...
  • High-Low Tow Bar Adapter for Blue Ox Aventa Tow Bar Towing Chevy Silverado 3500
    Blue Ox says that as long as the RV receiver height and base plate height are within three inches of each other, no adapter or riser is necessary, so you should be fine. However, if you did feel the need to use a High-Low adapter, they do offer one with a three inch rise/drop that's rated at 10,000 lbs, part # BX88235. To my knowledge, Blue Ox does not offer a riser/adapter like you describe, but Blue Ox offers a hitch immobilizer # BX88225 that might work if the sleeve sticks out from...
    view full answer...
    Image 1 for
  • Availability of 4 inch Drop Ball for Lowering Twistep Pet Step # HE3052
    All of the 4 inch drop hi-low adapters we offer will add some length to your hitch, but the Blue Ox # BX88129 will be the shortest at 6-1/2 inches of overall length from pin to pin which will probably work the best with your PET Twistep # HE3052.
    view full answer...
  • Weight Distribution Drop Shank Recommendation to Allow Trailer To be Towed Level
    What you need is a weight distribution shank that allows more drop than what you currently have. A high low adapter is not the solution you need as it will not be designed for use with a trailer or weight distribution hitch. Instead a shank like the part # C17124 would be what you need to allow the nose of your trailer to sit lower which will allow the trailer to tow level.
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  • 4 inch High Low Adapter for Use with Commander 2 Tow Bar
    It would seem that the Demco High Low Adapter would work fine with your Commander but since they specifically said that it only fits the Victory Series tow bars since that's only tow bar that tested it for we have to recommend you follow that, but we can still help. We have the Blue Ox High Low Adapter part # BX88129 which provides 4 inches of rise/drop and can be used with basically any tow bar including your Commander 2.
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  • How to Stop Cargo Bags Melting From Exhaust With 2 Inch Trailer Hitch Cargo Carrier
    Well that stinks; I assume your cargo bags were in a hitch mounted cargo carrier which is why the exhaust melted them. Hopefully you have a 2 inch hitch on your Kia Sorento, and if so, what you can do is use what is called a high-low adapter that will basically give your cargo carrier lift. Keep in mind that an adapter will lower the tongue weight capacity (which is the max capacity your cargo carrier, bags, and gear can weigh), of your hitch by 50 percent. So for example, if your Sorento...
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  • How to Select High/Low Hitch Adapter for Motorhome and Towed Vehicle to Keep Tow Bar Level
    The Blue Ox 2-Inch High-Low Adapter for Tow Bars # BX88129 has a 5000-lb towing capacity in both 4-inch rise or 4-inch drop positions. For a similar part with higher weight capacity you can use the 2-inch Roadmaster High/Low Adapter # RM-048-4 which is rated for up to 10,000-lbs towing. If your towed car is now showing unusual tire wear when towed by your new motorhome you will want to make sure that when hitched at both ends your tow bar is close to perfectly level. If the tow bar were...
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  • Will Using Front Mount Trailer Hitch On 2018 Ram 3500 For Bike Rack Block View
    The Draw-Tite Front Mount Trailer Hitch Receiver part # 65063 is an excellent option to haul a bike rack around with a 2018 Ram 3500. That said, the trailer hitch installs inside the front bumper so when using a bike rack there is a chance it could come up into the field of view. Therefore, a drop adapter would be a good idea. For this, we have the Blue Ox High-Low Adapter part # BX88129 which will work well so long as you stay under the 500 lb tongue weight capacity. Please note, if...
    view full answer...
  • Which 4 inch High Low Adapter Can be Used When Carrying a Bike Rack
    I have a similar solution that will work but the # BX88129 cannot be used with a bike rack. It can only be used when flat towing. The Roadmaster High Low adapter part # RM-048-4 on the other hand can be used with a bike rack and would be a really great option.
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  • Recommended Parts to Dinghy Tow a 2017 Chevrolet Sonic LT Sedan
    I have the perfect setup to dinghy tow your 2017 Chevrolet Sonic LT. For a tow bar I recommend using the Blue Ox Base Plate Kit, part # BX1703. This kit does not require any welding and has base plate tabs that can be removed for a very clean look when you are not towing your Sonic. The next thing that you will need is a tow bar. I really like the Blue Ox Alpha, part # BX7380, for this setup because it works well with the base plate kit and it comes with safety cables. This tow bar it...
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  • How to Carry Bikes on the Same Hitch as Your Flat Towed Vehicle
    A dual hitch adapter like the Curt # D-192 may be a good solution if you don't need any "drop" of the receiver. If you need something with 8" of drop or rise, then the Roadmaster # RM-077-8 could be a good pick. For 4" rise or drop the Blue Ox # BX88129 is the one. If you need a different rise or drop just let me know for an updated recommendation. I have attached links for each of these choices.
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  • Parts Needed to Flat Tow 2017 Jeep Wrangler Unlimited With Rugged Ridge XHD Bumper
    You can absolutely flat tow your 2017 Jeep Wrangler Unlimited with a Rugged Ridge XHD bumper and you will not need a base plate kit. What you will need is the Blue Ox Base Plate Adapter Brackets for Rugged Ridge XHD Bumpers # BX88301, which will attach directly to the bumper, as you can see in the accompanying photo and linked installation video. This bracket will require the use of a Blue Ox tow bar and for that I highly recommend the Blue Ox Alpha Tow Bar # BX7380 because of its strong...
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    Image 1 for
  • Parts Needed to Flat Tow 2020 Jeep Cherokee Trailhawk With Blue Ox Avail Tow Bar
    You can use the Blue Ox Avail Tow Bar # BX7420, although it is not actually what gets installed on your 2020 Jeep Cherokee Trailhawk in order to flat tow it. The parts that do are the base plates, wiring, and supplemental braking system (which will be the InvisiBrake you mentioned). To make it easy for you, here is a list of all the parts you will need to flat tow your 2020 Jeep Cherokee Trailhawk, with the prices of each on the product pages. - Base Plate Kit: Blue Ox Base Plate Kit #...
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  • How to Raise a Cargo Carrier for Ground Clearance on a Volkswagen Tiguan
    I recommend the Curt Multipurpose Ball Mount with 2 Inch receiver part # D210 to raise your etrailer cargo carrier part # e98874. The Curt ball mount has a receiver above the ball mount that will raise your cargo carrier 3-9/16 inches off of the ground to avoid scraping the driveway. The Curt Multipurpose ball mount with extra receiver does reduce the tongue weight capacity of the hitch part # C13381 by 50 percent. That does include the weight of the cargo carrier. The high/low adapter...
    view full answer...
  • Effect of Using Hitch High/Low Adapter for Extra Ground Clearance with Hitch Cargo Carrier C18151
    Use of an adapter like # BX88129 along with a hitch-mount cargo carrier like the Curt # C18151 will give you the height increase you want for better ground clearance but it will also have some unavoidable and undesirable side-effects. The first is reduction of your hitch's rated capacity by 50-percent. The loss of hitch weight capacity results from the adapter moving the actual load further away from the hitch tube. The further away that load is the more leverage it applies to the hitch...
    view full answer...
  • Blue Ox Base Plate & Parts Needed to Flat Tow 2006 Jeep Liberty
    We do have the correct Blue Ox base plate that is a fit for your 2006 Jeep Liberty, which is the following part: - Blue Ox Base Plate Kit # BX1122 This will work with the Blue Ox Adventurer, Aladdin, Allure, Alpha, Avail, Aventa, and Trion tow bars; if you do not have one of these I recommend going with the Blue Ox Alpha 2 Tow Bar # BX7380. Along with that, for wiring, the best part because it protects your Jeep's electrical system, is the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil...
    view full answer...
  • Flat Tow Package With a Blue Ox Baseplate and Tow Bar For a 2019 Jeep Wrangler JL Unlimited
    It sounds like you are looking to flat tow your 2019 Jeep Wrangler Unlimited. You will need the following parts to accomplish that. Base Plate Kit: Blue Ox Base Plate Kit - Removable Arms # BX1139 This is made in the USA and has a durable steel construction is powder coated to resist rust and corrosion Tow Bar: Blue Ox Avail Non-Binding Tow Bar # BX7420 (safety cables included with this tow bar) Made in the USA and has non-binding latches that make it easy to disconnect no matter the...
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  • Parts Needed to Flat Tow a 2021 Chevrolet Equinox
    There are at least 5 different parts needed to flat tow your 2021 Chevy Equinox behind your RV. I will list them out, explain what each one does/ is for and provide a recommendation for each part. Base Pate Kit: This is what installs onto your Equinox and where the tow bar coming from the RV will attach. I recommend the Blue Ox Base Plate Kit # BX1730. This base plate kit is made in the USA, has a hidden design that provides a clean, seamless look and the arms remove with a simple twist...
    view full answer...

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Info for this part was:

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