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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: $107.25
You Save: $16.74
Wheel Chocks
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Shipping Weight: 17 lbs
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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 (148)
  • Q & A (0)
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  • Why etrailer?

Ultra-Fab Products Wheel Chocks - UF21-001095

  • RV
  • Trailer
  • Wheel Chock
  • Wheel Stabilizer
  • Pair of Chocks
  • Steel
  • 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:  4.8 out of 5 stars   (148 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.


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

They work really great and we are very happy we were able to find them.
M G - 11/24/2022


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!


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


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.

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.
Larry S - 10/17/2017


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!


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
Jimmy - 12/31/2022


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.


they work real well when not on a level ground. they help a lot from the camper from rocking back and forth. thank you so much


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!


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


Two day service. Was great. Products seam to be just what was ordered


Exactly what I needed.


They worked great


Haven't tried them yet how they work


Definitely helps!


Nice product, only complaint is the two locks provided are not keyed alike. This requires me to carry both sets and identify which key goes to which lock. A simple feature that would fix an annoying recurring experience.


Super sturdy works great


When I ordered these they were not in stock. I had a trip coming up and was wanting to have these for the trip. The team at e trailer stayed in touch with me about when the part would stock and I received them the day before I left. I am currently using the product and can’t believe I waited so long to order them. They take nearly all of the forward to aft swaying. Camper is much mor stable. Thanks


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.

After a year, the Ultra-Fab Chocks have become part of our set-up routine and continue to do their job with ease.
Larry F - 05/21/2020


Great! We love the wheel chocks!
John D - 03/15/2022


Works as it should


Works awesome!!! Easier to use than traditional wheel chocks, and cuts down on front to back movement of the trailer


These chocks provide a big improvement in stability when moving around in tour travel trailer.


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.

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