How we researched this guide
We compared 5 leveling systems, checked 7 manuals and spec sheets, and reviewed 6 owner-report sources before choosing these picks. Every weight figure below is a maker rating, stated as “rated to,” and every figure we could not verify from a maker or listing record is marked “Not published” instead of guessed.
This guide answers a specific search honestly: concrete blocks and pavers are a do-it-yourself leveling method, not a product you buy in a box. So concrete itself is not a pick here. The five products below are the plastic and curved systems that replace concrete pavers, with the trade-offs — cracking, crushing, weight, and pad damage — stated from maker and owner sources.
The 30-second answer
For most trailers, start with the Tri-Lynx Lynx Levelers 10-pack for stackable height, or the Andersen Camper Leveler Ultimate kit for fast drive-on leveling up to 4 inches. For soft ground, use the wider Camco FasTen XL blocks. For a lower-cost curved kit, use the WELLUCK PL0166 kit, and for a standard stackable set with a carry handle, use the Camco FasTen 21022 blocks. Do not stack any system higher than its maker limit, and never use concrete blocks as a substitute without reading the safety section first.
Top pick
Tri-Lynx Lynx Levelers 10-pack
Best if you want one stackable set for wheels, tandem axles, and stabilizer jacks, with the highest maker rating in this guide.
Fastest setup
Andersen Camper Leveler Ultimate 2-pack
Best if you want to drive on, stop when level, and chock, with no stacking and no counting blocks in the dark.
Standard stackable
Camco FasTen Leveling Blocks 21022
Best if you want a familiar interlocking set with a twist-lock carry handle and a bright color that is hard to leave behind.
Soft ground
Camco FasTen XL Leveling Blocks 21026
Best if your sites are soft, loose, or uneven, because the wider footprint spreads the same wheel load over more ground.
Curved value kit
WELLUCK Camper Leveler kit PL0166
Best if you want a curved drive-on kit with chocks and mats included, for trailers within its maker rating.
| Product | Rated load | Max lift | Best for | Check Price |
|---|---|---|---|---|
| Tri-Lynx Lynx Levelers | Rated to 40,000 lb | 5.5 in leveling | Stackable, all uses | Check Price |
| Andersen Ultimate kit | Rated to 30,000 lb | 4 in | Fast drive-on | Check Price |
| Camco FasTen 21022 | Not published | 1 in per block | Standard stacking | Check Price |
| Camco FasTen XL 21026 | Not published | 1 in per block | Soft ground | Check Price |
| WELLUCK PL0166 | Rated to 35,000 lb | Not published | Curved value kit | Check Price |
Leveling finder: match the system to your rig, ground, and height
Enter your trailer gross vehicle weight rating in pounds and the height you need in inches, then choose your ground type. Every result below carries that pick’s own button, and no result leaves you without a recommendation.
Enter a weight and height to see a recommendation.
How to choose a leveling blocks alternative for concrete
Concrete fails in a specific way, and the replacement should fix that failure. A paver concentrates a wheel load on a brittle slab, can crack or crush, is heavy, and needs a jack to lift onto. A plastic system fixes weight and handling, a curved system fixes stacking, and a wider system fixes sinking. Start with the failure you face, then check the rating.
Maker rating first, brand second
Do not average ratings across brands. Tri-Lynx rates its system to 40,000 lb, WELLUCK to 35,000 lb, and Andersen to 30,000 lb. For the two Camco picks, no total rating was retrieved, so this guide lists it as “Not published” rather than borrowing a roundup figure. Compare it to your trailer gross weight rating, not one wheel.
Height needed, honestly measured
Measure the low side with a level before you buy, not by eye. Stackable blocks add about one inch per block, curved levelers cover half an inch to 4 inches, and Tri-Lynx caps leveling at 5.5 inches. If you need more, move to a flatter spot; stacking higher is not safe.
Ground type changes the pick
On firm gravel or a paved pad, almost any system here works, and speed matters most. On soft, loose, or muddy ground, footprint matters most: a narrow block sinks and a wide block spreads the load. That is why the wider Camco FasTen XL exists, and why Andersen includes mats in its Ultimate kit.
Axles and tire size
Tandem axles need a system that fits between or under both tires, and curved levelers need tire clearance. Andersen fits tires up to 32 inches and notes tandem spacing. Stackable blocks are more forgiving, because you can build a separate pyramid per tire, but build the same height under each low-side tire.
Leveling is not stabilizing
Leveling lifts the rig to level. Stabilizing stops bounce once it is already level. Tri-Lynx states this distinction, and it matters: a tire block is not automatically a jack pad, and a stabilizer jack must never lift a rig. Buy the block for tires and the cap or pad for jacks.
Storage, weight, and leaving nothing behind
Concrete is heavy, bulky, and easy to abandon in pieces. A 10-pack of plastic blocks weighs about 7 to 14 lb in total, fits in a bag or locks with a handle, and is bright enough to spot at pack-up. A curved two-pack takes less space, but cannot build tall pyramids.
Rig and axle guide
| Rig type | What to check first | Block rule |
|---|---|---|
| Single-axle trailer | Gross weight rating on door sticker | One pyramid per low-side tire |
| Tandem-axle trailer | Tire spacing and diameter | Same height under both tires |
| Fifth wheel | Front jack and stabilizer feet | Blocks under tires, pads under jacks |
| Class C motorhome | Rear axle weight and tire size | Curved leveler only if tires fit |
| Class A motorhome | Full gross weight rating | Highest rating only, check per-wheel load |
Use the gross vehicle weight rating from your own rig sticker, never a figure from a similar rig online. If you do not know your per-wheel load, weigh the rig or use the full rating against the maker system rating, and stay inside it. For trailer towing context, see our guides to the best winch for a car trailer and the best trailer winch for the money.
Leveling blocks alternative for concrete by budget
| Tier | What you get | Example pick |
|---|---|---|
| Value curved kit | Curved levelers, chocks, and mats in one kit | WELLUCK PL0166 |
| Standard stackable | Interlocking blocks with a carry handle | Camco FasTen 21022 |
| Wide footprint | Larger blocks for soft ground | Camco FasTen XL 21026 |
| Fast drive-on | Curved levelers, chocks, mats, and bag | Andersen Ultimate kit |
| Highest rating | Stackable system rated to 40,000 lb | Tri-Lynx Lynx Levelers |
No prices appear in this guide, by design. The tier order above is about what is included and what the maker rates, not about cost. A value kit that lacks the rating for your rig is not a saving, and a premium kit that cannot fit your tires is not an upgrade.
Types of concrete alternatives
| Type | Pros | Cons | Best for |
|---|---|---|---|
| Interlocking stack blocks | Exact inch-by-inch height | Slower setup, many pieces | Tall or uneven sites |
| Curved drive-on levelers | Fast, fine adjustment | Limited lift and tire fit | Quick overnight stops |
| Wide-footprint blocks | Less sinking on soft ground | Heavier and bulkier to store | Soft or loose sites |
| Jack pads and caps | Spread jack load, protect pads | Do not level tires | Stabilizer and tongue jacks |
Concrete itself sits outside this table for a reason: it is not a type of product, it is a material you improvise with. Its pros are availability and stiffness. Its cons, from Tri-Lynx and owner reports, are weight, bulk, cracking and crushing under load, the need for a jack to lift onto it, and damage to campground pads. Every type above is chosen to remove at least one of those cons, and none of them removes all of them at once.
Detailed reviews: leveling blocks alternatives for concrete
Each block below follows the same order: why it is a pick, its key specs, where it fits, what owners report, who should not buy it, and what to pair it with. Ratings are maker ratings. Where a spec was not published for that exact part, the block says so.
Top pick: Tri-Lynx Lynx Levelers 10-pack
Top pick
Why the Tri-Lynx Lynx Levelers is our pick
The Lynx Levelers set is the most versatile here, and the only one rated to 40,000 lb. It works under single wheels, dual wheels, tandem axles, and stabilizer jacks, building height one inch at a time in a pyramid.
It is also the clearest concrete replacement: where a paver is heavy and brittle, these blocks interlock, nest for storage, and come in a bag. Do not mix them with wood, stone, or concrete — a mixed stack has no single maker rating.
Tri-Lynx Lynx Levelers key specs
- Part number: 00015
- Pack: 10 blocks with nylon storage bag
- Block size: 8.5 x 8.5 x 1.5 inches
- Lift: 1 inch per added block in a stack
- Maker rating: rated to 40,000 lb as a system
- Leveling stack limit: 5.5 inches (5 blocks)
- Stabilizing stack limit: 8.5 inches (8 blocks)
- Pack weight: 7.5 lb per listing description
- Material: plastic, high-impact type per maker guide
- Uses: wheels, tandem axles, stabilizer jacks
- Warranty: 10-year maker warranty on registration
- Origin: made in the USA per listing
Tri-Lynx Lynx Levelers: fits and best for
This set fits most trailers and motorhomes inside 40,000 lb, and is the natural first choice for tandem axles: build an identical pyramid for each tire on the low side. See the best electric winch for a trailer.
Tri-Lynx Lynx Levelers pros and watch-outs
- Highest maker rating in this guide
- One-inch height steps for fine leveling
- Works under tires and under jacks
- Light, compact, and bagged for storage
- Long maker warranty on registration
- Slower to set up than a curved leveler
- Many loose pieces to count at pack-up
- Leveling pyramid capped at 5.5 inches
- Must not be mixed with concrete or wood
Tri-Lynx Lynx Levelers: what owners report
Owner reports link plastic-block breakage mainly to rough surfaces and heavy Class A use — preparation and staying inside the rating matter. See iRV2.
Owners also note concrete pads are rarely flat, being sloped for drainage, so a level pad does not always mean a level rig. See RV Forum.
Tri-Lynx Lynx Levelers: who should not buy
Do not buy this set for a fast overnight level if you hate loose pieces; the Andersen kit below is quicker. Above 40,000 lb, weigh first — do not assume any system here will hold. A better alternative for speed is the Andersen Camper Leveler Ultimate kit.
Tri-Lynx Lynx Levelers: pair it with
Pair it with a matching Tri-Lynx chock set to stop the leveled rig rolling, and jack pads under stabilizer feet on concrete pads to protect the pad and spread the load. See the best 12V winch for a utility trailer.
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Tip: build the pyramid on firm, flat ground, drive on slowly, then re-check level after extending the slide-out, which can tilt a rig that was level. See best RV covers rated.
Fastest setup: Andersen Camper Leveler Ultimate 2-pack
Fastest setup
Why the Andersen Camper Leveler Ultimate is our pick
The Andersen system replaces stacking with driving: place the curved leveler on the low side, drive forward until level, and insert the chock. That covers half an inch to 4 inches, with no stacking or loose pieces.
Buy the Ultimate kit for its added rubber mats and carry bag alongside the two levelers and two chocks. The mats matter on grass and soft ground, where a curved leveler can slip; if you already own mats and a bag, the standard two-pack is the same leveler.
Andersen Camper Leveler Ultimate key specs
- Part number: 3604-RTBA
- Pack: 2 levelers, 2 chocks, 2 rubber mats, carry bag
- Maker rating: rated to 30,000 lb
- Lift range: 0.5 to 4 inches
- Max tire diameter: 32 inches per maker guidance
- Leveler length: about 15 inches per listing
- Use: trailers and campers, one side only
- Tandem axles: one leveler per axle as described by maker
- Material: molded leveler with rubber mats
- Origin: made in the USA per maker description
- Warranty: Not published in maker sources checked
- Chock: Tuff Chock included per kit description
Andersen Camper Leveler Ultimate: fits and best for
This kit fits trailers and campers up to 30,000 lb with tires up to 32 inches, best for tandem-axle trailers where the leveler fits between the tires. Very large tires, tight tandem spacing, and lifts over 4 inches rule it out — measure first.
Andersen Camper Leveler Ultimate pros and watch-outs
- Fastest setup in this guide
- Fine adjustment from 0.5 to 4 inches
- No loose blocks to stack or count
- Chocks and mats included in this kit
- Compact curved shape for storage
- Lift capped at 4 inches
- Tire size and spacing limits apply
- Not for rigs over 30,000 lb
- Can slip on wet grass without mats
Andersen Camper Leveler Ultimate: what owners report
Owner guides describe the same workflow — drive on slowly, stop when level, chock, done — with the 4-inch cap as the main limit. See The Camping Nerd.
Another owner guide stresses the curved shape, the half-inch to 4-inch range, and the same 30,000 lb and 32-inch limits, matching the maker listing. See The RV Geeks.
Wet-ground slipping is the most repeated caution — hence the mat-included pick. Place mats first on grass.
Andersen Camper Leveler Ultimate: who should not buy
Do not buy this kit for lifts over 4 inches, tires over 32 inches, or tandem spacing that cannot fit the curved leveler. A stackable set is then the honest alternative: it builds height in inches and fits each tire separately. A better alternative for height is the Tri-Lynx Lynx Levelers 10-pack.
Andersen Camper Leveler Ultimate: pair it with
Pair it with a separate set of wheel chocks for the high side and a small bubble level readable from the driver seat, so you need not guess when to stop. See the best hand winch for a car trailer.
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Tip: level with the slide-outs in, then re-check with them out — a heavy slide can change the reading. See cheap truck campers under 5000.
Standard stackable: Camco FasTen Leveling Blocks 21022
Standard stackable
Why the Camco FasTen 21022 is our pick
The Camco FasTen set is the standard stackable block most campers know: interlock, build a pyramid, drive on, twist the handle to lock. No new technique, no tire-size limit — an advantage on a dark site.
It is also the most practical everyday replacement for a concrete paver. A concrete block is heavy and sharp-edged; these blocks are light, bright yellow, and lock together with a handle — easy to carry and hard to leave behind.
Camco FasTen 21022 key specs
- Part number: 21022
- Pack: 10 blocks with twist-lock T-handle
- Block size: 8.5 x 8.5 x 1 inches per listing title
- Lift: 1 inch per added block
- Maker rating: Not published for this exact part
- Material: plastic, UV-stabilized resin
- Pack weight: 8 lb per listing
- Uses: single and dual wheels, tandem axles
- Uses: tongue jacks and stabilizer jacks
- Color: yellow for visibility at pack-up
- Design: interlocking 2×2 block pattern
- Warranty: Not published in sources checked
Camco FasTen 21022: fits and best for
This set fits single and dual wheels and tandem axles, and works under tongue and stabilizer jacks as well as tires; if one block is damaged, the set still works. See the best boat trailer winch.
Camco FasTen 21022 pros and watch-outs
- Familiar interlocking design, no learning curve
- Twist-lock handle for carrying and storage
- Bright color, hard to leave behind
- Works under tires and under jacks
- UV-stabilized resin for outdoor use
- Total maker rating not published for this part
- Slower than a curved leveler for small lifts
- Many pieces to handle on a tall stack
- Not a wide-footprint soft-ground design
Camco FasTen 21022: what owners report
One owner account of the closely related Camco 44510 blocks reports long, hard use under a tongue jack and stabilizers. See Reset Your Journey.
Forum reports also note plastic blocks can crack on very loose gravel under heavy jacks — a ground and load problem, not proof every block fails on firm ground. See iRV2.
Coverage for 21022 itself is thinner than for the older Camco family; no claims are transferred across part numbers.
Camco FasTen 21022: who should not buy
Do not buy this set if you need a published total rating for a heavy rig: this exact part does not publish one. Buy a rated system instead, such as Tri-Lynx, and use its rating as your ceiling. Nor is it a soft-ground fix; the wider XL set below is better there. A better alternative for a published rating is the Tri-Lynx Lynx Levelers 10-pack.
Camco FasTen 21022: pair it with
Pair it with Camco leveling block caps for a smooth jack surface and matching wheel chocks, both covered in the safety section. See the best winch recovery kit.
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Tip: count the blocks back into the handle lock before you leave, and photograph a tall pyramid stack so the next setup repeats the same height. See top trailer hitch brands.
Soft ground: Camco FasTen XL Leveling Blocks 21026
Soft ground
Why the Camco FasTen XL 21026 is our pick
The XL set differs from the standard Camco set in one soft-ground way: footprint. Each block is 10.5 by 10.5 inches instead of 8.5 by 8.5, so the same wheel load spreads wider and sinks less — worth the extra bulk on mostly soft sites.
It keeps the same FasTen idea — interlocking blocks, a T-handle, a 10-pack building height in steps — but is heavier and bulkier: the wrong pick if your locker is full and your sites are firm.
Camco FasTen XL 21026 key specs
- Part number: 21026
- Pack: 10 blocks with T-handle
- Footprint: 10.5 x 10.5 inches per block
- Lift: 1 inch per added block per listing
- Maker rating: Not published for this exact part
- Material: polymer block, FasTen design
- Pack weight: 13.95 lb per listing
- Color: gray per listing
- Uses: single and dual wheels, tandem axles
- Uses: hydraulic, tongue, and stabilizer jacks
- Design: interlocking 2×2 XL pattern
- Warranty: Not published in sources checked
Camco FasTen XL 21026: fits and best for
This set fits the same wheel and jack uses as the standard Camco set, with a wider base for soft ground — best for grassy pitches, loose gravel pads, muddy seasonal sites, and dual-wheel setups needing more tire room. On a firm paved pad the standard set does the same job smaller and lighter — do not buy the XL for firm ground alone.
Camco FasTen XL 21026 pros and watch-outs
- Wider footprint for soft ground
- Same familiar FasTen stacking idea
- T-handle for carrying the set
- Works under tires and under jacks
- Good for dual wheels and tandem axles
- Heavier and bulkier than standard blocks
- Total maker rating not published for this part
- Thickness figures conflict in listing records
- Overkill on firm paved pads
Camco FasTen XL 21026: what owners report
Owner writing on Camco blocks in general stresses durability, compact storage, and bright visibility, but the XL gray set is less written about than the standard yellow set, so this guide invents no XL-specific claims. The soft-ground case rests on footprint.
Forum reports on soft ground agree: a narrow foot sinks, a wide foot spreads load, and a pad under a jack protects jack and surface. See RV Forum.
Treat footprint as the main verified difference from the standard set.
Camco FasTen XL 21026: who should not buy
Do not buy this set if your sites are firm and storage is tight; the standard Camco set is lighter and smaller for the same job. Nor if you need a published total rating: this part does not publish one. A better alternative for a published rating is the Tri-Lynx Lynx Levelers 10-pack.
Camco FasTen XL 21026: pair it with
Pair it with a jack pad or cap under stabilizer feet: a wide tire block alone does not protect a jack foot on soft ground. See best LED towing mirrors under 250.
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Tip: on soft ground, place the widest block at the bottom of the pyramid and keep it centered under the tire, so the load stays on the footprint. See tow ropes reviews for caravans.
Curved value kit: WELLUCK Camper Leveler kit PL0166
Curved value kit
Why the WELLUCK PL0166 is our pick
The WELLUCK kit offers the curved drive-on idea at value-kit level: two curved levelers, two chocks, two mats, and a bag, for trailers within 35,000 lb — between Andersen at 30,000 lb and Tri-Lynx at 40,000 lb, so it covers more trailers than Andersen.
It is also a cleaner concrete replacement for a quick stop: nothing to stack or count, no separate chock to buy — drive on, stop when level, chock. As with every curved kit, lift is limited and tire fit matters.
WELLUCK PL0166 key specs
- Model: PL0166
- Pack: 2 curved levelers, 2 chocks, 2 mats, bag
- Maker rating: rated to 35,000 lb per listing
- Lift: Not published for this exact part
- Design: curved drive-on leveler with chock
- Use: travel trailers and campers
- Anti-slip: mats included per listing
- Storage: carry bag included per listing
- Material: heavy-duty leveler material per listing
- Fit: check tire size before ordering
- Warranty: Not published in sources checked
- Pack weight: Not published in sources checked
WELLUCK PL0166: fits and best for
This kit fits travel trailers and campers within 35,000 lb where the curved leveler fits tires and tandem spacing — best for frequent movers, weekend trips, and overnight stops where speed beats tall stacking height. It is not the pick for a large lift: the maker lift figure was not retrieved, and this guide will not guess it from another curved kit.
WELLUCK PL0166 pros and watch-outs
- Complete kit: levelers, chocks, mats, bag
- Rated to 35,000 lb, above Andersen
- Fast drive-on setup, no stacking
- Mats help on slippery ground
- Compact two-pack for storage
- Lift figure not published for this part
- Tire fit must be checked before ordering
- Not for lifts beyond the maker limit
- Newer brand with thinner owner history
WELLUCK PL0166: what owners report
Owner coverage for this exact model is thin, and this guide says so rather than borrowing claims from Andersen or Camco kits. Curved-kit owner writing stresses the same points: drive slowly, stop at level, chock at once, use mats on grass. See the curved-kit workflow at The RV Geeks — workflow only, not a claim about WELLUCK itself.
Concrete-comparison writing is more useful: concrete blocks crack and crush, and need a jack for lifting — exactly what a drive-on kit avoids. See Tri-Lynx.
Treat the first setup as a firm-ground fit check before relying on it on a soft or sloped site.
WELLUCK PL0166: who should not buy
Do not buy this kit if you need a stated lift figure in advance: this part does not publish one. Nor if your rig exceeds 35,000 lb, or your tires do not fit a curved leveler. A better alternative for a stated lift and the highest rating is the Tri-Lynx Lynx Levelers 10-pack.
WELLUCK PL0166: pair it with
Pair it with second chocks for the high side and a driver-seat-readable level, to stop at the right point on the curve. See the best snatch block for winching.
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Tip: drive on in small increments, chock at once — a curved leveler can roll back if you pause unchocked on a slope. See tow rope versus recovery rope.
Spec comparison
| Product | Rated load | Max lift | Footprint | Check Price |
|---|---|---|---|---|
| Tri-Lynx Lynx Levelers | Rated to 40,000 lb | 5.5 in leveling | 8.5 x 8.5 in | Check Price |
| Andersen Ultimate kit | Rated to 30,000 lb | 4 in | About 15 in long | Check Price |
| Camco FasTen 21022 | Not published | 1 in per block | 8.5 x 8.5 in | Check Price |
| Camco FasTen XL 21026 | Not published | 1 in per block | 10.5 x 10.5 in | Check Price |
| WELLUCK PL0166 | Rated to 35,000 lb | Not published | Curved ramp | Check Price |
| Product | Pack contents | Material | Warranty | Best for |
|---|---|---|---|---|
| Tri-Lynx Lynx Levelers | 10 blocks, bag | Plastic | 10-year on registration | Highest rating |
| Andersen Ultimate kit | 2 levelers, chocks, mats, bag | Molded leveler | Not published | Fast drive-on |
| Camco FasTen 21022 | 10 blocks, T-handle | UV resin | Not published | Standard stacking |
| Camco FasTen XL 21026 | 10 blocks, T-handle | Polymer | Not published | Soft ground |
| WELLUCK PL0166 | 2 levelers, chocks, mats, bag | Heavy-duty material | Not published | Curved value kit |
Editorial scores, not test results: Tri-Lynx 9 for versatility and rating, Andersen 9 for speed, Camco FasTen 21022 8 for standard use, Camco FasTen XL 8 for soft ground, WELLUCK 7 for value with a thinner owner history. Scores reflect maker ratings, fit limits, and kit completeness in this guide, not laboratory testing.
Fitment and installation basics
Leveling is a setup job, not a wiring job. Park on the firmest ground available, set the parking brake, and chock the high-side wheels before leveling the low side. Measure first, build or place the system for that height only, and drive on slowly while a spotter watches the level. Then set all chocks and extend stabilizers only enough to stop bounce, never to lift.
For stackable blocks, build a pyramid, not a tower, with the tire centered, and never exceed the maker limit. For curved levelers, place the leveler on the low side only, drive on slowly, stop at level, and chock at once. For jacks, place a cap or pad under the foot, especially on concrete. For background, see our guides to how to use a winch and the best electric winch for a car trailer.
At pack-up, count every block, chock, and mat back into its bag or handle lock. A bright color helps, but a count prevents a short set next time. If a block is cracked, chipped, or crushed, retire it: a damaged block has no reliable rating.
Safety essentials
1. Chock before you level, and chock again after you level, on both sides where possible.
2. Never crawl under a rig supported only by leveling blocks or stabilizer jacks.
3. Never use stabilizer jacks to lift a rig; level with tires and blocks first.
4. Never stack blocks higher than the maker leveling limit for that system.
5. Never mix brands, wood, stone, or concrete in one stack; a mixed stack has no rating.
6. On concrete pads, use a pad or cap under jack feet to spread load and protect the pad.
Safety accessories with verified buttons: Camco Leveling Block Caps 44500, for a smooth jack surface on Camco blocks, Check Price; Camco Wheel Chocks 44401, for use with Camco blocks, Check Price; BAL X-Chock 28012, a tandem-axle tire stabilizer, Check Price. For recovery safety gear, see our guides to the best tree saver strap and the best D-ring shackles for recovery.
Troubleshooting
| Symptom | Likely cause | Fix |
|---|---|---|
| Rig still unlevel after setup | Slide-out extended after leveling | Re-check level with slide-outs out |
| Block sinks into ground | Footprint too small for soft ground | Switch to wider XL blocks or a pad |
| Curved leveler slips | Wet grass or no mat under leveler | Place rubber mat first, drive slowly |
| Stack wobbles under tire | Tower built instead of pyramid | Rebuild as a centered pyramid |
| Block cracks under load | Overload, rough ground, or damage | Retire the block, check rating and ground |
| Concrete pad chips or cracks | Jack foot concentrates load | Use a pad or cap under every jack foot |
Who should NOT buy these
Heavy rigs over the maker rating should not buy any block system on hope. If your gross weight exceeds 40,000 lb, none of the systems in this guide is rated for it as a whole, and a block set is not a substitute for a rated leveling system or a flatter site. Weigh the rig first.
Drivers who need more than 5.5 inches of lift should not buy blocks as the fix. Stacking higher than the maker limit, or adding concrete to reach height, creates an unrated stack. Move the site, change the pitch, or use a different leveling method that is rated for that height.
Owners who want a set-and-forget stabilizer should not confuse leveling with stabilizing. Blocks level the rig; they do not replace stabilizers, chocks, or a proper jack pad. Buy the right tool for each job, and see our guide to the best portable winch for a truck for tow-side gear, not as a leveling substitute.
Anyone set on concrete should not buy plastic blocks expecting concrete behavior. Plastic blocks flex, interlock, and need a pyramid or curve to work, and they must not be mixed with concrete in one stack. If you insist on concrete, read the Tri-Lynx maker warning and the owner reports on cracking first, and accept the weight, jack, and pad-damage trade-offs. For trailer alternatives, see our guide to alternatives to skid plates for trailers.
Final verdict
Top pick — Tri-Lynx Lynx Levelers 10-pack: Check Price
Fastest setup — Andersen Camper Leveler Ultimate 2-pack: Check Price
Standard stackable — Camco FasTen Leveling Blocks 21022: Check Price
Soft ground — Camco FasTen XL Leveling Blocks 21026: Check Price
Curved value kit — WELLUCK Camper Leveler kit PL0166: Check Price
Concrete is not in the verdict because it is not a buyable pick. The verdict is simple: buy the rated system that fits your weight, height, ground, and tires, stay inside its maker limits, and do not improvise a taller stack out of concrete.
FAQ
What is the best leveling blocks alternative for concrete?
For most trailers, the Tri-Lynx Lynx Levelers 10-pack is the best all-round alternative, because it is rated to 40,000 lb, builds height one inch at a time, and works under tires and jacks. For fast drive-on leveling up to 4 inches, the Andersen Ultimate kit is the better choice, and for soft ground, the wider Camco FasTen XL blocks are the better choice.
Can I level an RV on concrete blocks?
You can, but Tri-Lynx and owner reports warn against it as a routine method: concrete blocks can crack or crush under a wheel load, they are heavy and bulky, and you need a jack strong enough to lift the rig onto them. If you do use concrete, keep hollow cores vertical, spread the load evenly, and never mix concrete with plastic blocks in one stack.
Can I use concrete pavers under stabilizer jacks?
A paver under a jack foot spreads load, but it can also crack, chip the pad, or shift under load. A purpose-made jack pad or block cap is the safer choice, because it is shaped for the foot and does not add an unrated layer. On campground concrete pads, use a pad under every jack foot as a courtesy and a protection measure.
How high can I stack leveling blocks?
Follow the maker limit for your exact system. Tri-Lynx caps a leveling pyramid at 5.5 inches, or 5 blocks, and caps a stabilizing stack at 8.5 inches, or 8 blocks. Curved levelers cap at about 4 inches. If you need more height than the limit, move to a flatter spot rather than stacking higher.
Do plastic leveling blocks hold a heavy Class A motorhome?
Only if the rig stays inside the maker system rating. Tri-Lynx rates its system to 40,000 lb, WELLUCK to 35,000 lb, and Andersen to 30,000 lb, but per-wheel load and ground matter too. Weigh the rig, compare the full rating, and do not assume a block set rated for a trailer will hold a heavier motorhome on soft ground.
Are leveling blocks the same as stabilizer blocks?
No. Leveling blocks lift the rig to level, usually under tires. Stabilizer blocks and pads sit under jack feet after leveling to stop bounce. Tri-Lynx states this distinction, and confusing the two is a common setup error: a stabilizer jack must never be used to lift a rig into level.
What is better for soft ground: standard blocks or XL blocks?
XL blocks are better on soft ground, because their 10.5 by 10.5 inch footprint spreads the same wheel load over more ground than a standard 8.5 by 8.5 inch block. On firm ground, the standard set is lighter and smaller for the same job, so buy the XL set for soft sites, not for every site.
Can I mix leveling blocks with wood or concrete?
No. Tri-Lynx states that its blocks are made for use with other Lynx products only and warns against pairing them with wood, stone, or concrete. A mixed stack has no single maker rating, and the different materials compress and shift differently under load, which is exactly how a stack fails.
Do I need leveling blocks on a concrete pad?
Often, yes. A concrete pad is rarely perfectly flat, because pads are sloped for drainage, and an extended slide-out can tilt a rig that was level before it went out. Level the rig on the pad with blocks or a curved leveler, chock it, and use pads under jack feet to protect the concrete surface.
Sources & changelog
Manufacturer sources: Tri-Lynx FAQ; Tri-Lynx on wood and concrete; Lynx Levelers user guide.
Owner and forum sources: RV Forum concrete pad thread; iRV2 leveling blocks thread; ShunAuto on concrete blocks; The Camping Nerd on Andersen; The RV Geeks on Andersen; Reset Your Journey on Camco; Streaming Airheads on Andersen; We Are Salt leveling roundup; Travel Safe Abroad leveling roundup.
Amazon listing records used only for ASIN, part number, and pack verification: Tri-Lynx B0028PJ10K, Andersen B076X5W1LZ, Camco B07ZHP8XFD, Camco B07ZHNWMH2, WELLUCK B0D1733P5C, Camco caps B00KTJ5BRE, Camco chocks B007H2TF4Q, BAL X-Chock B002XLHUQG.
Changelog — October 30, 2026: guide first published.
By Leo, Founder, WinchInsider
Leo covers towing, recovery, and trailer gear, with a focus on maker ratings and setup that holds up on real sites. Read more on our about page and browse the RV and camper accessories archive.
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Top pick: Tri-Lynx Lynx Levelers 10-pack Check Price