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Super Grip Chock XL Wheel Stabilizers for Tandem-Axle Trailers and RVs - Qty 2

Super Grip Chock XL Wheel Stabilizers for Tandem-Axle Trailers and RVs - Qty 2

Item # UF21-001095
Our Price: $128.91
Wheel Chocks
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Designed for tandem-axle trailers with up to 17" wheel spacing, these wheel chocks will rid your rig of rocking by stabilizing your trailer or RV. Simply place the chocks between tandem tires and expand them until the give is gone. Great Prices for the best wheel chocks from Ultra-Fab Products. Super Grip Chock XL Wheel Stabilizers for Tandem-Axle Trailers and RVs - Qty 2 part number UF21-001095 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (164)
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Ultra-Fab Products Wheel Chocks - UF21-001095

  • RV
  • Trailer
  • Steel
  • Wheel Chock
  • Wheel Stabilizer
  • Pair of Chocks
  • Ultra-Fab Products
  • Silver

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


  • Wheel chocks eliminate 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 units
  • Lockable to deter theft - padlocks included
  • Heavy-gauge steel construction
  • Corrosion-resistant zinc plating


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

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

Eliminate the annoying rocking of your trailer or RV no matter where you park it. The Super Grip Chocks XL brace 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 they hug 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 XLs are able to apply the force necessary between the tires to provide excellent stability for your trailer or RV.

Mounting the Super Grip Chock XLs

The included E-Z ratchet makes it fast and easy to set up the Super Grip Chock XLs. Simply place a 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 padlocks.

21-001095 Ultra Fab Super Grip Chocks XL - Tandem Axle - Expands 17" - Qty 2

Customer Satisfaction Score:

Customer Reviews

Super Grip Chock XL Wheel Stabilizers for Tandem-Axle Trailers and RVs - Qty 2 - UF21-001095

Average Customer Rating:  4.7 out of 5 stars   (164 Customer Reviews)

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


So far so good. Just arrived. Fit well on my mallard with wide Trax suspension.


I looked everywhere and couldn’t find what we needed. I contacted them and Kevin replied quickly. We needed ones that would go past 17” and he had a set that went 18” and a little past. It was great and their service was excellent I give them 5 stars and recommend them to anyone

M G.


They work really great and we are very happy we were able to find them.

by: 06/22/2023

The super grip shocks were what I had been looking for and needed for our camper. The company gave great service in helping me get what we needed. It was the only place I could find them that were big enough for the space between the tires on our camper. I highly recommend them and the company gives great fast service.


What a difference. Used front and back side chocks as always but still had a little fore and aft rocking. Added these and wow! Steady as she stood. Agree that you will want the nut on the bottom to avoid the skirt. Locks provided will keep the opportunists at bay. Do not plan to stop anywhere I would be worried about anything worse. Great product and fits my wide spaced double axle.

Larry S.


Still working great. Salty environment is not kind to them and recommend a good fresh water rinse and some spray silicone on the threaded rod, good to go.


We could not be happier with our Super Grip Chocks that we bought last year! They fit and work perfectly. Looking forward to a great and steady camping year 2024!!


Works very well and has held up well. The ratchet tool never worked but replaced with a gearwrench for an upgrade.



Holding up and working well.


These were a little awkward to install at first. Once in place they seem to do the job intended. The locks probably could be popped off in a heartbeat. They seem to hold to the tires pretty well. Time will tell when we are actually staying in the trailer.


I think the nut should be welded so it won't fall off when your other half spins it too long with your impact...other than that I think their Grrreat!!!


I couldn't find 17" so these are great! Maybe include the correct socket/impact so its easier to install....wishing the handles were welded on but this is a fantastic product!


The Ultra Super Grip Chock XL works great. Due to the distance between the wheels it is a little more difficult to get the chocks aligned properly. Also, due to the size of the chocks I was unable to get a battery powered drill on the nut to extend or retract the chocks.
There is no correct installation. Be advised that the pictures on the website and the shipping box show the nut on the TOP. However, the enclosed "INSTRUCTIONS" indicate that the nut goes on the bottom. Either way is up to your particular preference.
Bottom line is the chocks work as advertised!


These work good to stop fore and aft movement. Just a little pressure on the tires does the job. Don’t crank on the adjustment nut too much, or you will put undo pressure on the tires, springs and spring schakles. These wheel stabilizers work great!


Received my Super Grip Chock XL Wheel Stabilizers June 12 and put them to work that weekend. The product did as it stated on the product explanation. Our trailer did not rock back and fourth at all, just some side to side motion while we were getting in and out. They were a little bit of a pain to get adjusted at first after I received them. But after adjusting them and having them ready for the weekend maybe three minutes each to reinstall. I totally recommend these, make sure you keep your receipt, they have a life time warranty!


Exactly what I needed.

Jerry S.


Working out really good, great product,use them all the time.

Etrailer Expert

Mike L.


@JerryS We're glad the # UF21-001095 wheel chocks are working well for you!


Would order from this company again. Received item very quickly. Very good quality chocks. Thank you etrailer!!


I have 13" wheel spacing on my Mallard travel trailer. These filled the gap and stabilized the trailer. Great purchase!


Great, get 2 for price of one from local dealer


The Ultra-Fab Wheel Chocks have helped reduce annoying movement of our travel trailer caused by our movement from front to rear and side to side. They are easy to install and remove for storage.

Larry F.


After a year, the Ultra-Fab Chocks have become part of our set-up routine and continue to do their job with ease.


John C.


Great! We love the wheel chocks!


Best ever. Stops camper from shaking.


The XL chocks were the only ones i could find to fit my trailer as the tandems were so far apart. they are a little bit cumbersome for an old man with back issues to put on, but they work great.


This product has worked perfectly for me. About 20 campouts later and they stay on the camper all winter in storage and have work flawlessly. Makes me feel much more confident that the trailer will not roll anywhere and fit my wider stance axles perfectly


First I have to comment on how quickly I received my packages from eTrailer. Excellent.
Now for the review.
I have used these just once so far on my Passport with the wider spaced axles. It works great!!! It really does. The locks they provide are a little generic and cheaply made. The keys are like those keys for locks kids play with. I'll end up buying some high quality locks if I want to lock these up. I didn't buy these for the lock so it doesn't bother me. Definitely worth it. I had to install mine with the screw pointing upwards. Makes sense once you have them.


These help with the bounce in our camper. Do they remove it fully? No, but any amount removed helps. Now instead of feeling like we are on the ocean in a storm when our son is running around I feel like I'm on a calm lake.


This x chock is still working great after a full year of can't go wrong with this product.



Ultra-Fab chocks are still working just great. After a year from purchase and I do recommend them


Works fine. When removing between tires, open chock just enough to pull out and store in opened position . It's a nuisance to wind the chock all the way closed during transport then reopen to fit between tires. I like the small locks that come with the chocks, just don't misplace the tiny keys.

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