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

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

Item # UF21-001090
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Ultra-Fab Products Wheel Chock,Wheel Stabilizer - UF21-001090
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Designed for tandem-axle trailers with up to 10-1/2" 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. Lowest Prices for the best wheel chocks from Ultra-Fab Products. Super Grip Chock Wheel Stabilizer for Tandem-Axle Trailers and RVs - Qty 1 part number UF21-001090 can be ordered online at or call 1-800-496-5010 for expert service.
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Ultra-Fab Products Wheel Chocks - UF21-001090

  • 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 10-1/2" 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


  • Application: RVs with up to 15" wheels
  • Collapsed width:
    • Center of chock: 1"
    • Ends of chock: 5"
  • Fully extended width at ends of chock: 10-1/2"
  • Quantity: 1 wheel chock
  • Lifetime limited warranty

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

Eliminate the annoying rocking of your trailer or RV no matter where you park it. The Super Grip Chock 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 the Super Grip Chock 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 is able to apply the force necessary between the tires to provide excellent stability for your trailer or RV.

Mounting the Super Grip Chock

The included E-Z ratchet makes it fast and easy to set up the Super Grip Chock. 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 the included padlock.

UF21-001091 Wheel Spacing Requirements

21-001090 Ultra Fab Super Grip Chock - Tandem Axle - Expands 10-1/2" - Qty 1

Customer Reviews

Super Grip Chock Wheel Stabilizer for Tandem-Axle Trailers and RVs - Qty 1 - UF21-001090

Average Customer Rating:  4.7 out of 5 stars   (395 Customer Reviews)

Designed for tandem-axle trailers with up to 10-1/2" 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.


Yes, I did receive this item in good order. It arrived on the scheduled time. I have not had a chance to put it to the test yet but did a trial fitting and it appears to be satisfactory. Thank you.

This product works great to in my opinion. It also helps stabilize the trailer a good bit. For that reason Im most likely going to order another for the other side in the near future.
Tom D - 01/25/2022


Took product from the box and notice that it was well made. Instructions are easy to follow. I would recommend this to anyone who has a camper.


I bought two and gave away one as a present. Great quality, really well maade.


Hi folks,
Actually, I liked the wheel
chocks just fine; my wife wasn’t so fond. They worked well except for the wrench was kind of cheesy- the ratcheting function failed after a few uses, but I made do. Alas, on a camping trip in Nevada, I neglected to remove one from between the wheels before I pulled off the leveling blocks. It popped out, landing between the wheels while I calmly flattened it while pulling ahead. That sucked. My wife was secretly pleased......well, really, she was openly pleased after looking at the smashed piece of metal. “Good, now we can get different kind”, was one of her first comments. Okay, Sweetie, whatever. I was going to save the ruined chock, then paint it some psychedelic colors and sell it as ‘modern art’ for big bucks. Or at least enough to cover the cost of a new set of wheel chocks. Well, that didn’t work. The true end was the formerly functioning wheel chock ended up in the metal recycling bin. Probably to return as another wheel chock hoping to live a long life chocking wheels and not leaving angular impressions in the sand at a Nevada State Park. Other than all that, it’s fine product. Thanks.
Napa, CA


Works as advertised, seems to be built very sturdy. My only complaint, which I'm hoping will resolve itself over time, is that all the joints are so stiff that when you are trying to retract it you have to keep pressure on the sides or the bolt just wants to unthread at the top and not actually keep retracting the chock.


Wheels are pretty close on our 5th wheeler, but these actually collapsed down quite a bit and ended up fitting nicely. Sturdy and not too heavy. We really enjoy the added stability provided by these and with the locks it's just another issue for someone up to no good to have to deal with :)


Our trailer has fairly soft suspension, which is nice on the road but not so nice in the campground. I've tried just about everything I can think of to keep the trailer from rocking with little success. I was already using one x-type wheel chock, but added this one for the other set of wheels. It makes a major difference in how the trailer feels when someone walks inside it, and will make my job of stabilizing the trailer much simpler.


Easy to install. Comes with tool. Locks tires together and adds stability to my camper when parked. No more rocking and no more back and forth stress in my trailer jack off stabilizers


Easy to use locks the wheels were they don’t move makes camper more stable.

Working great keeps camper in place no rocking.
John - 01/11/2020


Very easy to understand instructions. Easy to place between tires and secure with ratchet. Sturdy product. Well made. Use on my 24 foot travel trailer. Provides additional stability.


Wheel chocks seem well made. They just arrived and we won't use them until May so I can't comment on how well they work. The service was great, they were well packaged, and were delivered as promised.


This was the perfect addition to my horse trailer and camper. Just referred a friend to etrailer!


Seems to fit tires well & holds camper tightly in place. Well pleased with product. Impressed with the lifetime warranty


Great web-site ....................... competitive pricing ................. fast shipping!
Used this product last week-end and it worked perfectly. I will be traveling
this summer across the United States and I'm sure this will work just fine
on my 28' travel trailer. Thanks for a great product!


We feel safe with the jacks in place and they are very easy to use. Very sturdy product, made well, easy to store.


Great wheel locks! Everyone should use them.


These are great still use them everyday


Very poorly made wrench us it three times throw it its shot tightened bolt to tight striped threads luck would have had a hacksaw along to cut it free the great china junk



Light weight. Well made. Does the job. Happy we made the purchase.


Strong and easy to use. The included wrench works well.


Everything was as expected. Very quick delivery. Will always look to etrailer for future purchases .


Great product would definitely recommend. If you're looking for something quality this is it. The service is unmatched.


Good construction, heavy duty. Used them Eight times and they work great.


Excellent product and super easy to set up. I felt an immediate difference with the forward to back movement. Thanks

Still working great after a year... great investment
Derrick F - 07/14/2018


Very good service, love the trailer. Quality built.

Show More Reviews

See what our Experts say about this Ultra-Fab Products Wheel Chocks

  • Socket Size for Super Grip Chock Wheel Stabilizers
    The Super Grip Chock Wheel Stabilizer for Tandem-Axle Trailers and RVs # UF21-001090 weighs about 5 lbs; it is also available as a pair of stabilizers at part # UF21-001091. The socket size is 17mm and it does come with an E-Z ratchet if you need or want to expand it manually. I have added links to a couple video reviews of the stabilizer for you to check out as well.
    view full answer...
  • Is There a Difference Between Ultra-Fab Wheel Stabilizers?
    Aside from price, the difference is that Ultra-Fab stabilizer # UF21-001090 is a single unit, while # UF21-001091 comes in a quantity of two. I've added links to review videos of each of these products for you to take a look at.
    view full answer...
    Image 1 for
  • Should I Use One Super Grip Chock Wheel Stabilizer Or Two To Stabilize My Trailer?
    I always use the Super Grip Chock Wheel Stabilizer # UF21-001090 as a Set # UF21-001091. This will prevent the trailer from pivoting on the chocked tires. It will also allow you to use them to secure your camper at your site and while in storage. These chocks will spread up to 10-1/2" at the widest point. This measurement will be 5" up or down from the tires narrowest point. If you have a wider spread than 10-1/2" they have the Super Grip Chock XL Single # UF21-001094 and Set # UF21-001095...
    view full answer...
  • Can the Super Grip Chock Wheel Stabilizer Be Used To Hold a Trailer On a Slope/Incline
    The Super Grip Chock Wheel Stabilizer for Tandem-Axle Trailers part # UF21-001090 is more of a stabilizer than a wheel chock. Therefore, you can still use these to help prevent the trailer from rocking etc. but in order to hold the trailer in place on an incline/slop you'll need an actual wheel chock. The Rumber Wheel Chock Set part # RM57FR is what I recommend as they are very heavy duty and easy to use due to the included chains.
    view full answer...
  • Recommended Stabilizer Jacks for a 2001 Fleetwood Wilderness Travel Trailer
    In order to help stabilize your 2001 Fleetwood Wilderness Travel Trailer I recommend using two sets of the Scissor Stabilizer Jacks w/ Handle part # TJSCHD-24, one of each side of the trailer as this will provide the most stability. These jacks are easy to install and might even use the same holes as the jacks you have now. They offer up to 18-3/4" of lift and have a 2,500 lb per jack rating. If you really wanted to fully stabilize the trailer then you could also add a set of the Super...
    view full answer...
  • Preventing Theft of 5th Wheel Trailer Using Convert-A-Ball Cushioned 5th-Wheel-to-Gooseneck Adapter
    What I would do with the Convert-A-Ball Cushioned 5th-Wheel-to-Gooseneck Adapter # CAB-C5GX1216 is loosen the set screw that holds the inner coupler tube in, remove the coupler, and store it in a locked vehicle or other location. If the coupler part isn't there no one could come along and steal the trailer! Traditional gooseneck coupler locks won't work on this adapter so if you want to go with a more traditional method than what is described above I recommend the Super Grip chock # UF21-001090....
    view full answer...

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