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Super Grip Chock XL Wheel Stabilizer for Tandem-Axle Trailers and RVs - Qty 1

Super Grip Chock XL Wheel Stabilizer for Tandem-Axle Trailers and RVs - Qty 1

Item # UF21-001094
Our Price: $65.34
Wheel Chocks
This item qualifies for Free Shipping
Shipping Weight: 8 lbs
In Stock
Ultra-Fab Products Wheel Chocks - UF21-001094
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Designed for tandem-axle trailers with up to 17" wheel spacing, this wheel chock will rid your rig of rocking by stabilizing your trailer or RV. Simply place the chock between tandem tires and expand it until the give is gone. Great Prices for the best wheel chocks from Ultra-Fab Products. Super Grip Chock XL Wheel Stabilizer for Tandem-Axle Trailers and RVs - Qty 1 part number UF21-001094 can be ordered online at or call 1-833-496-1390 for expert service.
  • All Info
  • Reviews (145)
  • Q & A (0)
  • Photos
  • Why etrailer?

Ultra-Fab Products Wheel Chocks - UF21-001094

  • Trailer Wheel Chock
  • RV Wheel Chock
  • Wheel Chock
  • Wheel Stabilizer
  • Single Chock
  • Steel
  • Silver
  • Ultra-Fab Products

Designed for tandem-axle trailers with up to 17" wheel spacing, this wheel chock will rid your rig of rocking by stabilizing your trailer or RV. Simply place the chock between tandem tires and expand it until the give is gone.


  • Wheel chock eliminates give between tandem-axle tires to prevent rocking when parked
  • Pivoting louvers on arms grip tire tread to prevent slipping
  • Included E-Z ratchet makes it simple to expand unit
  • Lockable to deter theft - padlock included
  • Heavy-gauge steel construction
  • Corrosion-resistant zinc plating


  • Quantity: 1 wheel chock
  • Application: dual-axle trailers and RVs
    • Wheel spacing: 3-1/2" - 17"
  • Lifetime warranty

Note: The purpose of the Super Grip Chock XL is to limit front-to-back motion on parked tandem-axle trailers. Do not use as a brake or wheel wedge.

Eliminate the annoying rocking of your trailer or RV no matter where you park it. The Super Grip Chock XL braces your tandem wheels against one another, stabilizing your trailer even on uneven terrain. No more front-to-back motion.

Pivoting Louver Technology

Pivoting Louvers

The pivoting louvers allow each Super Grip Chock XL to get a stronger grip on your tires as it hugs the surface of each tire. The raised ridges grip onto the tire tread to keep the chock from slipping. The louvers can also swivel to conform to the exact curve of your tires, creating a better grip on the tires. As a result, the Super Grip Chock XL is able to apply the force necessary between the tires to provide excellent stability for your trailer or RV.

Mounting the Super Grip Chock XL

The included E-Z ratchet makes it fast and easy to set up the Super Grip Chock XL. Simply place the chock, in the open position, between the tandem tires of your trailer and use the ratchet to turn the nut on the rod until the width of the unit fits the spacing of your tires. Once the chock is firmly in place, lock it with one of the included padlock.

21-001094 Ultra Fab Super Grip Chocks XL - Tandem Axle - Expands 17" - Qty 1

Customer Satisfaction Score:

Customer Reviews

Super Grip Chock XL Wheel Stabilizer for Tandem-Axle Trailers and RVs - Qty 1 - UF21-001094

Average Customer Rating:  4.8 out of 5 stars   (145 Customer Reviews)

Designed for tandem-axle trailers with up to 17" wheel spacing, this wheel chock will rid your rig of rocking by stabilizing your trailer or RV. Simply place the chock between tandem tires and expand it until the give is gone.


These wheel chocks were recommended to me by a friend. I had always just used the old school yellow plastic wheel chocks and always experienced a bit more trailer motion than I would have liked. I bought the X-chocks from E-Trailer and have used them each and every time we go camping now. They are GREAT, we experience little to no unwanted trailer motion when we are parked and the trailer is very solid feeling when we are walking about in it. I would highly recommend the X-Chocks to anyone thinking about getting them. They may be a bit pricey compared to other chocks but, they are worth it.


Easy and simple. Worked exactly as advertised on our Keystone Premier with a with 14 1/2 inch wheel spacing. The supplied wrench is rather cheap, so invest in a ratcheting wrench and or standard socket. They don't specify what the nut size is - which is a small lack easily fixed by adding it to instruction sheet. Seems to be 11/16" but 17mm also worked.


works great to block the 2 wheels against each other


Quick delivery. Excellent quality. The package includes a ratchet and a padlock to prevent theft. Very satisfied.

We use them every time out. Not only does it reduce back and forth movement inside, its also provides a bit more security knowing your trailer isnt going anywhere.
Wade J - 10/04/2021


I haven't had the opportunity to use these yet but I'm sure it will be great.


Have not used it yet, but due to poor packaging the ratchet wrench was lost in shipping. The lock is extremely cheap and probably not even worth using.

Sorry to hear about your missing item. Customer service will be reaching out to you.
-- Etrailer Expert Sierra K - 08/23/2021


Excellent design. Easy to use and install between tires. Stops “trailer sway” when walking inside camper. Fast delivery from etrailer.


I received the Super Grip Chock Wheel Stabilizer today, exactly when promised. I greatly appreciate the timely service, as well as the follow up e-mail.
As for the product, I could not be more pleased and impressed with the stabilizer, it's design, construction, and fit - A well thought out product.
An additional impressive touch was the included ratchet tool and the security pad lock !
I would have gladly given the product a five star rating, but the packaging proved to be a major disappointment. When the package arrived, one end of the box was blown wide open. Fortunately, the stabilizer, ratchet, and the pad lock were still inside the plastic bag.
In my opinion, the cardboard box is just too light for the weight of the product,
to be able to endure multiple handlings during shipment across country. This product and it's original box needs to be boxed inside a stronger cardboard box for long distance shipping. An upgrade in shipping container is STRONGLY urged !
Thank you.


I love these. I bought the smaller size thinking they were the correct size and when they didn't fit I gave them to my buddy. Got these and now we both agree it helps to keep the RV from rockin' so much, especially when the kids are asleep and you don't want them waking up.


We purchased of these and it made a big difference on our 37 ft RV. No more rocking as we move around once these are in place


Great stabilizer for a safety-trac trai ler


Good product. Seems to work well.


Drastically increased the stability of the trailer when walking around. Great product.


Perfect fit and worked great to stablize the trailer. Just didn’t notice it was one each rather than a pair. Had to go back and order another one.


Rugged built, performed as advertised


Was as described. Prompt delivery. The box was flimsy and wide open when delivered. All was there but packages was very bad.

it works as advertised but if I had to do it over again, I would have bought the better quality. Has more flex than the one I have for the other side.
paul l - 09/17/2018


Within a month the screw are all thread stripped out it was made of cheap metal I would not recommend this item

After a few times of you seen the super grip brake lock the all thread or bolt stripped out because it was made of cheap metal so I tried to fix it and put a different all thread in it, so its not the best product.
-- Etrailer Expert Greg - 02/20/2018


I have not install on my RV yet but the products I received are what I expected and came on time. I am happy.


Quick delivery, product as described


It does a great job

It still works great
Marty M - 09/26/2019


Sorry but I have to use this with another wheel lock I have to get my small, 21 ft trailer to not move. I expected it to lock the wheels better.
Janis K - 04/05/2022


I bought these to stabilize and they are as good as advertised. The lock that came with it was very cheap. Good buy.



Good condition, 3 day delivery! Looks lightly made more than I thought, I guess they got to keep it light, da! A lot cheaper than the store ($$).


When ordering make sure if you need one for each side you order 2. They are not a set.

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