1. Leveling Blocks
  2. Ultra-Fab Products
  3. Stackable Blocks
  4. 10 Blocks
  5. 8-1/4L x 8-1/4W Inch
  6. Blue
Ultra-Fab Leveling Blocks for Trailers and RVs - 8-1/4" Wide x 8-1/4" Long - Qty 10

Ultra-Fab Leveling Blocks for Trailers and RVs - 8-1/4" Wide x 8-1/4" Long - Qty 10

Item # UF48-979051
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Leveling Blocks
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Leveling Blocks UF48-979051 - Blue - Ultra-Fab Products
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Interlocking blocks stack to different heights and can be positioned beneath jacks, stabilizers or RV wheels to add just enough lift to level your rig. Fastest Shipping and Guaranteed Lowest Prices for Ultra-Fab Leveling Blocks for Trailers and RVs - 8-1/4" Wide x 8-1/4" Long - Qty 10. Read our customer reviews of Ultra-Fab Products leveling blocks. Call 800-298-8924 for expert service or order your leveling blocks part number UF48-979051 by Ultra-Fab Products online at etrailer.com.
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  • Reviews (115)
  • Q & A (31)
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Ultra-Fab Products Leveling Blocks - UF48-979051

  • Stackable Blocks
  • 10 Blocks
  • 8-1/4L x 8-1/4W Inch
  • Ultra-Fab Products
  • Blue

Interlocking blocks stack to different heights and can be positioned beneath jacks, stabilizers or RV wheels to add just enough lift to level your rig.


Features:

  • Stackable blocks provide extra lift to level your trailer or motor home
    • Position beneath jacks, stabilizers or trailer wheels
  • Interlocking design guarantees no shifting or collapsing once stacked
    • Stack straight up for extra height
    • Stagger blocks to create a ramp so you can easily drive up
  • Durable plastic construction
  • Storage case with integrated carrying handle included


Specs:

  • Quantity: 10 blocks
  • Individual block dimensions: 8-1/4" wide x 8-1/4" long x 7/8" tall
  • Weight capacity: 30,000 lbs
  • 3-Year warranty


Note: The manufacturer does not recommend stacking more than 5 blocks high



48-979051 UltraFab Ultra Leveling Blocks - 10 Pack





Video of Ultra-Fab Leveling Blocks for Trailers and RVs - 8-1/4" Wide x 8-1/4" Long - Qty 10

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Ultra-Fab Products Leveling Blocks - Stackable Blocks - UF48-979051 Review

Today well be reviewing part number UF48-979051. These are the Ultra Fab leveling Blocks for Trailers and RVs, quantity of 10 is included. It also includes a nice storage case with integrated carrying handle. Its going to hold all 10 in one stacked position. Its going to conveniently store, whether its in your trunk, storage compartment or in your garage. The stackable blocks are going to provide extra lift to level out your trailer or motor home.

You can position the blocks beneath jacks, stabilizers or even trailer wheels. They have a nice integrated locking design thats going to guarantee no shifting or collapsing once theyre stacked. You can stack these in a straight up position for extra height or you can choose to stagger them. Thats going to allow you to create a ramp so you can easily drive up onto the blocks and achieve the balance or level that youre looking for. Theyre made from a durable plastic construction.Real quick, I just want to go over the dimensions of one of the blocks for you. They are all identical.

Our block has a nice square design and its going to measure 8-1/4 inches by 8-1/4 inches. Now one block is going to measure 1-3/8 of an inch tall measuring from the bottom to the very top, including the parts that interlock. When you stack another block on top, the bottom block is now 7/8th of an inch tall, because inch of the bottom block interlocks into the block on top of it, so when you have 2 blocks stacked, we now have a measurement of 2-1/4 inches from the bottom to the very top. With 4 blocks stacked, we have a measurement of right at 4 inches.I just wanted to show you that to kind of give you an idea. Just keep in mind that inch of the block underneath the other block is the portion thats interlocked.

Thats going to complete todays review of part number UF48-979051. This is the Ultra Fab Leveling Blocks for Trailers and RVs. .


Customer Reviews

Ultra-Fab Leveling Blocks for Trailers and RVs - 8-1/4" Wide x 8-1/4" Long - Qty 10 - UF48-979051

Average Customer Rating:  4.7 out of 5 stars   (115 Customer Reviews)

Interlocking blocks stack to different heights and can be positioned beneath jacks, stabilizers or RV wheels to add just enough lift to level your rig.

- UF48-979051
by:

They work great! 597831



- UF48-979051
by:

Does the same thing as the other colored blocks but a lot cheaper. 220717


Comments
still no issues a year later
Jeff - 08/20/2016

20418

- UF48-979051
by:

These blocks have saved us so many times, I can not tell you. From when we are told that the RV parking is "All Concrete Pad" just to arrive and find out that only 1/2 the pad is concrete (so the blocks make it so our rig is level). To parking in the rain and starting out level, to waking to our heads being smooshed against the headboard as our rig settled into the mud-Blocks to the rescue! Great purchase. Buy two sets, you will NEED them! 289270



- UF48-979051
by:

After a year of service, they are still in tact and functional. 323611


Comments
Nothing has broken or failed using them about 3 months out of the year. Recommend not using on gravel or rocky surfaces without some base like a piece of plywood or something like that. Without that, the rocks will cause minor damage to the underside that will impede stacking. If this happens, just file off the burrs and stacking becomes normal again.
John - 12/11/2017

31685

- UF48-979051
by:

Original request for review was upon delivery. I waited. I used the product . . . in all manner of conditions. Now that I've used and abused, it's ok to say: I am pleased. These are the real deal, delivered earlier than promised back when I got them, and doing a better (flawless) job than even I (an admitted grouch about quality) expected. They are solid, versatile, and one of those items you say to yourself "I did right getting those". Good, quality product. 116096


Comments
Tim, Ive been reading about the colored levelers, and I read that Orange are no good, yellow is the best, but are you showing Blue and saying they are far superior, and will not break... we have 28 dual axel. 7000lbs.ksocks
-- comment by: Nancy K - 05/29/2014

4520

- UF48-979051
by:

The blocks fit together neatly and securely, should function exactly as intended. They're surprisingly heavy, which bodes well for their strength for the job, though the tire loading on my small teardrop isn't much. They should last for years! Next outing starts tomorrow, we'll soon see. etrailer was, as usual, fast and friendly. 564216



- UF48-979051
by:

Nice product - works well 845511



- UF48-979051
by:

Work very well for RV leveling adjustments allowing me to replace heavy bulky wood with these nifty light blocks. 828199



- UF48-979051
by:

Shipping was fast 824864



- UF48-979051
by:

The bag makes for easier storage. 817799



- UF48-979051
by:

Very nice leveling blocks. I anticipate buying one more kit so I have plenty on hand for leveling my trailer 771611



- UF48-979051
by:

Makes the side to side leveling of my camper so much easier and faster. Gets that drink in my hand faster so I am happy! 691387



- UF48-979051
by:

My order was delivered complete and on time. Friendly, helpful staff. 644453



- UF48-979051
by:

Had three break (explode) while leveling our 5th wheel on a lot containing compacted sand in Florida. Never had this issue with orange Lynx Leveling Blocks. 603342



- UF48-979051
by:

The leveling blocks look good. Will try them out soon. 566781



- UF48-979051
by:

Just what we needed to make leveling ea sier. 546127



- UF48-979051
by:

LOVE LOVE LOVE these. They are so nice and compact. Having the case to keep them all in one spot is a huge plus. My husband said he likes we don't have to carry a bunch of wood around in the pickup truck. The camper backs up nicely onto them. We also use them under our stabilizing jacks. 529187



- UF48-979051
by:

Added an additional kit for our 5500. Very durable and easy to store. 509725



- UF48-979051
by:

We not only use them for tire leveling but trailer stabilizer bottom supports. Instead of hauling heavy 6"x6" wood blocks, solid construction plastic blocks is cheaper. It's all about weight when towing a camper! 500382



- UF48-979051
by:

The Leveling blocks work great for my trailer. Most importantly is the service I get from etrailer. From shipping updates to emails. I've purchased other items in the past, and will continue as the need arises 482403



- UF48-979051
by:

Quick shipment, well packaged and product is as described. Don't know when or if they will be used, but felt it was a must have just in case needed. Thank you etrailer! 482332



- UF48-979051
by:

Sturdy and the right color to match our Camper. 465541



- UF48-979051
by:

Have not used them yet, but I am very confident that they will hold up under our class A motorhome, super fast shipping! Good price! 460385



- UF48-979051
by:

Have not used them yet, but I am very confident that they will hold up under our class A motorhome, super fast shipping! Good price! 460384



- UF48-979051
by:

Work great.Easy to use. 446649


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Show More Reviews

Ask the Experts about this Ultra-Fab Products Leveling Blocks

  • Height of Ultra-Fab Leveling Blocks Part # UF48-979051
    Each leveling block is 1-3/8 inches tall, but 1/2 inch of that will nest into the block placed on top of it. Two blocks stacked atop one another would be 2-1/4 inches tall.
    view full answer...
  • Using Leveling Blocks Part # UF48-979051 on Each Wheel of Dually Pick Up
    I spoke with one of our contacts at Ultra-Fab, who recommend using blocks under each wheel. He went on to say that if only one block per side is used, it should be placed under the inner wheel. We have a product demonstration video showing the leveling blocks in use, to view the video click on the provided links.
    view full answer...
  • How Do You Know How Many Ultra-Fab RV and Motorhome Leveling Blocks to Use
    You're correct, you'd need to use trial and error. However, you could use a leveler like part # HM09615, which would eliminate a lot of guesswork and eyeballing.
    view full answer...
  • Comparing the Ultra-Fab and Stackers Leveling Blocks
    The Lynx Leveling Blocks you have will not work with the Ultra-Fab Leveling Blocks part # UF48-979051. The reason for this is that the surface pattern which is used to lock them together is different. You would need to either purchase more of the Lynx Leveling Blocks or a new set of Ultra-Fab Leveling Blocks. In order to minimize the amount of blocks needed to level your trailer you may also be interested in the Stackers Leveling Blocks part # A10-0918 which are 1-3/8" tall compared...
    view full answer...
  • Should Both Tires be Raised When Using Leveling Blocks?
    When using leveling blocks such as the Ultra-Fab # UF48-979051 you do not have to raise both tires on 1 side. If you are using the blocks on 1 tire on 1 side of your travel trailer and you are level then you can continue to do that without any type of problem.
    view full answer...
  • Availability of a Top Cap for the Ultra-Fab Leveling Blocks
    The Ultra-Fab leveling blocks # UF48-979051 are designed for leveling trailers and RV's and the reason they are quite rigid on top and extremely durable. I called our representative at Ultra-Fab and there isn't any type of top cap available. You can use an additional set to increase their height as needed since they are stackable.
    view full answer...
  • Can Ultra-Fab Trailer Levelers be Used to Provide a Base for a Scissor Jack
    Yes you can use the Ultra-Fab levelers, # UF48-979051, as bases for the foot on a scissor jack. These levelers have many uses, even if not directly stated. I have included a link to a video review for you.
    view full answer...
  • How Flexible are the Ultra-Fab Leveling Blocks and What is the Weight Capacity
    The Ultra-Fab leveling blocks, # UF48-979051, have a 30,000 pound capacity. These blocks are rigid and could potentially flex some if torqued enough. A co-worker has blocks similar to these and he has not experienced any cracking, even in cold weather, but he says what will happen over time is the tops will start to get smooshed. Otherwise they will be a durable item.
    view full answer...
  • How to Get Trailer Level When Parked on Decline
    Instead of using an uneven, unreliable piece of wood, I recommend checking out the Ultra-Fab Leveling Blocks # UF48-979051. These blocks are 8-1/4" wide x 8-1/4" long x 7/8" tall and you can position them under your jack and/or wheels to get your trailer level; there is also the option of using independent electric jacks, though that is an expensive upgrade and these blocks should work to get you level. I've added links to video reviews of these blocks for you to check out as well.
    view full answer...
  • What Does the Out of Stroke Error On the Lippert Ground Control System Mean
    The out of stroke error you are seeing is shown when you have extended the jacks further then they are designed to reach. The solution to this problem would be to try and find a more level place to park the trailer but you can also use the Ultra-Fab Leveling Blocks part # UF48-979051 so that the jack legs do not have to extend as far. The out of stroke error could also be caused by a few other things but if all works as it should save for this then odds are you are just reaching the maximum...
    view full answer...
  • Out of Stroke Error on Lippert Ground Control
    I am a bit confused by your question as Kwikee does not make trailer jacks but rather trailer steps. If you were instead referring to trailer jacks such as the Lippert Ground Control 3.0 Electric 5th Wheel RV Leveling System part # LC358590 then the "out of stroke" error means you have extended the jack too far. If the jack will not retract using the touchpad then you will need to do so manually with the manual override on top or bottom (see photo). If you continue to get an "out of...
    view full answer...
  • Which Ramp Style Trailer Jack Can Work on Triple Axle Trailer
    I have a solution for you, but the # EZ-JACK won't work well on a triple axle trailer. It would be too difficult to get the jack between the tires of a triple axle trailer and the height wouldn't be enough. Take a look at the Ultra-Fab Leveling Blocks, # UF48-979051. These 10 levelers can be stacked as needed and the space between tires of multiple axle trailers should not be an issue. With a triple axle trailer though a 10-pack may not be enough so you may need 2 of the 10 packs. Each...
    view full answer...
  • Can the Andersen Camper Leveler be Used on a Triple Axle 5th Wheel Trailer
    Because of the travel of the suspension on a trailer, using just one leveler, # AM3604, would not provide enough lift in most circumstances. It would be difficult to use more than one per side on a triple axle trailer so I recommend going with a different type of leveler. Take a look at the Ultra-Fab Leveling Blocks, # UF48-979051. These 10 levelers can be stacked as needed and the space between tires of multiple axle trailers should not be an issue. With a triple axle trailer though...
    view full answer...
  • Comparing Anderson Rapid Jacks # AM3620 and # AM3604 For Trailer Leveling
    The difference between Andersen Rapid Jack # AM3620 and # AM3604 is not only the height but the length. The Rapid Jack # AM3620 is 17 inches long whereas # AM3604 is 15 inches long. This small difference means that the longer one will not fit as a leveler of multi-axle trailers. Otherwise they are pretty much the same. Another option is to use Ultra-Fab leveling blocks # UF48-979051. There are 10 included and each is 7/8 inches tall. This will allow you incremental leveling. I have included...
    view full answer...
  • Troubleshooting Out of Stroke Error Code on Lippert Ground Control 3.0 of RV
    If you get the Out of Stroke error message on the Lippert Ground Control system, such as # LC358590, then that indicates that the jack has extended as far as it will go and cannot go any further. You might be able to solve this issue by raising the jack back up and placing some sort of leveler under it, such as # UF48-979051, so that the jack does not have as far to go. The other possible option is to move the coach or trailer to a different, more level location. To clear the error you...
    view full answer...
  • Can Stabilizer Jacks be Used to Lift RV a Little
    To answer the last question first, a stabilizer jack such as # JSC-30 would be used until there was just enough tension to keep the trailer or RV from rocking. For actual lifting you would need a different device. So assuming that the RV was level these stabilizers would help prevent it from rocking back and forth or side to side (depending on where they were mounted) while you move around inside. If you were to try to lift weight with them you would have a very hard time because it...
    view full answer...
  • Can Scissor Jacks be Used to Level a 5th Wheel Trailer and Will it be Hard to Manually Crank Them
    Ultra-Fab Ultra Scissor Jacks # UF48-979002 are designed to stabilize and support a trailer. To do so they will push up on the trailer but they cannot lift the trailer up off the ground so keep that in mind. This is true for all scissor jacks. Considering that the jacks will be placed where the trailer is the heaviest it would be difficult to manually crank the jacks. But if you used drill attachment # UF48-979005 and an electric drill it would make it a lot easier and faster. Another...
    view full answer...
  • Should Leveling Blocks Be Used with the Lippert Ground Control If Wheel Is In Air When Parked
    The individual jacks of the # LC358590 are not designed to support the full weight of your camper when installed. If you are on unlevel enough ground that a wheel is in the air I would recommend a leveling block like the # UF48-979051.
    view full answer...
  • Out of Stroke Error Code on Lippert Ground Control 3.0 Electric 5th Wheel RV Leveling System
    If you get the Out of Stroke error message on the Lippert Ground Control system, such as # LC358590, then that indicates that the jack has extended as far as it will go and cannot go any further. You might be able to solve this issue by raising the jack back up and placing some sort of leveler under it, such as # UF48-979051, so that the jack does not have as far to go. The other possible option is to move the coach or trailer to a different, more level location. To clear the error you...
    view full answer...
  • Can Andersen Camper Wheel Chock and Leveler AM3604 be Used if More than 4 Inches Off Level
    If you are more than 4 inches off level then you would still be off level when using Andersen Camper Wheel Chock and Leveler Item # AM3604 just to a lesser degree. So if you are 5 inches off, use this leveler, you will still be 1 inch from being level. You can still use it you just won't be level. What I recommend is to also have some leveling blocks such as # UF48-979051. These are stackable blocks so you can adjust how many are used for the best height to level the trailer/RV. If...
    view full answer...
  • Are Trailer Scissor Jacks Made for Leveling or Stabilizing a Trailer or Both
    Scissor jacks on trailers can be used as levelers or stabilizers. They are just not meant to lift up the weight of the trailer so that would limit the amount of leveling they can do. I recommend also using leveling blocks # UF48-979051, or the ones you already have, so that they are doing most of the leveling and the scissor jacks can be used to keep the trailer stable. Scissor jacks aren't meant to support a load off of the ground indefinitely so a secondary leveling device is recommended...
    view full answer...
  • Recommendations for Leveling a Toy Hauler on an Uneven Driveway
    Once installed from the pin to the bottom of the foot is going to be under 8 inches tall so that is probably not going to be enough lift for you. Instead you could use something like a scissor jack, # JSC-30-IND, that offers 30 inches of lift. We also have some handy levelers, # UF48-979051, that you can use under the jack for additional height. A similar product would also work well. Take a look at the stabilizers # UF48-979004. With these you get height adjustment from 11 to 17 inches...
    view full answer...
  • Out of Stroke Error Troubleshooting on Lippert Ground Control
    If you get the Out of Stroke error message on the Lippert Ground Control system, such as # LC358590, then that indicates that the jack has extended as far as it will go and cannot go any further. You might be able to solve this issue by raising the jack back up and placing some sort of leveler under it, such as # UF48-979051, so that the jack does not have as far to go. The other possible option is to move the coach or trailer to a different, more level location. To clear the error you...
    view full answer...
  • Leveler Recommendation for a Tandem Axle Cougar 5th Wheel Trailer
    The Andersen Rapid Jack, # AM3620, when used on tandem axle trailers is only meant to be used as a jack, not a leveler. For tandem axle trailers, I recommend Ultra-Fab levelers # UF48-979051. This kit comes with 10 levelers so you can raise the trailer in 1 inch increments. I have linked a video review of this kit for you.
    view full answer...
  • Leveling Ramp Recommendation for F-350 with Truck Bed Camper
    The FloTool RhinoRamps Max Vehicle Ramp Set # FT11912MI is not designed for use as a leveling jack. It is only designed as a jack to raise both sides of a vehicle up evenly. Basically the manufacturer doesn't want you using these on uneven ground as the ramp was never tested in this setup. Their fear is that the ramp could lose traction or the tire slip off the ramp etc. The part # UF48-979051 is a block setup that is designed for leveling which would be the best option we have.
    view full answer...
  • Recommendations for Leveling the Front of a 1994 Vectra Motorhome
    If you need 8 inches to allow your 1994 Vectra Motorhome to sit level the part # AM6320 would be the correct product. If you need a different amount of height you would instead want the part # UF48-979051 as it is adjustable. I attached a review video for the # UF48-979051 for you to check out.
    view full answer...
  • How Many Anderson Chocks and Levelers # AM3604 are Needed to Level a Tandem Axle Trailer
    Presumably you would be using chock and leveler # AM3604 to level a trailer side to side so at most you would need 2 of them. If you used 4 on a tandem axle trailer then it would still be off level just higher up from the ground. A better option that will allow you more precise leveling is to use leveling blocks such as # UF48-979051. That way you could use as many blocks as needed under each individual tire to level the trailer. We have a lot of leveling block options which I have linked...
    view full answer...
  • Can 2 or More Andersen Camper Levelers be Used on the Same Side of a Triple Axle Trailer
    Because of the travel of the suspension on a trailer, using just one leveler, # AM3604, would not provide enough lift in most circumstances. It would be difficult to use more than one per side on a triple axle trailer so I recommend going with a different type of leveler. Take a look at the Ultra-Fab Levelers, # UF48-979051. These 10 levelers can be stacked as needed and the space between tires of multiple axle trailers should not be an issue. With a triple axle trailer though a 10-pack...
    view full answer...
  • Dimensions of Ultra-Fab Leveling Blocks
    The Ultra-Fab Leveling Blocks individually measure 8-1/4" wide x 8-1/4" long each; they are available in different quantities: - Quantity of 4: Ultra-Fab Leveling Blocks # UF48-979050 - Quantity of 8: Ultra-Fab Leveling Blocks # UF48-979052 - Quantity of 10: Ultra-Fab Leveling Blocks # UF48-979051 I have added a link to a video review of these leveling blocks for you to take a look at.
    view full answer...
  • How To Fix Out Of Stroke Error When Leveling Camper
    If you are getting an "Out of Stroke" error message when trying to level the trailer with a Lippert Ground Control Electric 5th Wheel RV Leveling System like part # LC675817 then that means you are most likely trying to extend the jacks further than they are designed to reach. The solution to this problem would be to try and find a more level place to park the trailer but you can also use the Ultra-Fab Leveling Blocks part # UF48-979051 so that the jack legs do not have to extend as far....
    view full answer...

Do you have a question about this Leveling Block?




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Info for this part was:

Expert Research:
Mike L
Expert Research:
Michael H
Written by:
Lindsey S
Video by:
Jacob T
Updated by:
Adele M
Updated by:
Sarah W
Updated by:
Halie H
Updated by:
Matthew E
Installed by:
Cole B
Installed by:
Randy B

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