How we researched this guide
We compared 10 leveling products: 6 picks below plus 4 dropped candidates named in the research notes. We checked 6 maker documents — the Tri-Lynx FAQ and manual, the Beech Lane stackable manual, Camco maker text for the 44510 blocks, the Andersen listing spec record and the CARMTEK manual — and 5 owner forum threads about blocks versus boards. Lumber has no maker document, so every lumber figure here comes from those forum threads and is labelled as such.
Where figures conflicted we kept the conflict in print: the Andersen warranty reads lifetime on one secondary source and 3 years on another, Camco block height reads 1 inch from Camco and 1.5 inches elsewhere, and Tri-Lynx listing weights are corrupted, so we use the maker 7.5 lb figure. We do not test products, and nothing here comes from hands-on use.
The 30-second answer
For most campers, blocks win on precision and packing: the Andersen Camper Leveler 3604-2 gives the finest adjustment, the Camco Heavy-Duty Leveling Blocks 44510 give the most flexible stack, the Tri-Lynx Lynx Levelers 00015 are the long-proven classic, and the Beech Lane Camper Leveler is the heavy-duty curved option. Wood still wins in two honest cases: DIY lumber boards under wheels are the cheapest way to level a heavy rig, and lumber cribbing under jacks is the simplest way to shorten jack travel on soft ground. Buy blocks for precision; keep boards for budget and jack pads.
Best overall
Andersen Camper Leveler 3604-2
Best if you want exact level in one drive-on move: continuous 0.5 to 4 inch adjustment, no block counting.
Best stackable
Camco Heavy-Duty Leveling Blocks 44510
Best if you level wheels and jacks with one kit: interlocking 1 inch blocks building pyramids, ramps and jack pads.
Best proven classic
Tri-Lynx Lynx Levelers 00015
Best if you want the original interlocking block: made in the USA since 1992, rated to 40,000 lb, 10-year warranty on registration.
Best heavy-duty curved
Beech Lane Camper Leveler
Best if you run a heavier trailer on a curved leveler: nylon-polymer build rated to 35,000 lb, mats, chocks and bag included.
Best budget
DIY Lumber Boards Under Wheels
Best if budget beats convenience: hardware-store 2×10 or 2×12 boards, cheapest lift for a heavy rig — bulky, heavy and stepped.
Alternative with a ready-made link: if you do not want to cut and haul lumber, the Tri-Lynx stack below is the closest substitute.
Best for jacks
Lumber Cribbing Under Jacks
Best if your jacks over-extend or wobble: cross-grain boards under stabilizer and tongue jacks shorten travel and spread load.
Alternative with a ready-made link: if you would rather buy than cut, the Camco 44510 stack is rated by Camco for jack and stabilizer use.
| Product | Type | Max lift | Rated load | Check Price |
|---|---|---|---|---|
| Andersen 3604-2 | Curved leveler | 4 in | 30,000 lb | |
| Camco 44510 | Interlocking stack | 1 in per block | Not published | |
| Tri-Lynx 00015 | Interlocking stack | 5.5 in pyramid | 40,000 lb | |
| Beech Lane leveler | Curved leveler | 4 in | 35,000 lb | |
| Lumber boards (wheels) | Wood boards | Board thickness steps | Not published | No listing — ready-made alternative below |
| Lumber cribbing (jacks) | Wood jack pads | Board thickness steps | Not published | No listing — ready-made alternative below |
Leveling finder: how much lift do you need?
Enter the height the low side must rise and the ground you park on. Every result recommends a pick from this guide.
How to choose leveling blocks or wood
Lift height and step size
Start with how far the low side rises. Curved levelers adjust continuously from 0.5 to 4 inches, so they land exactly on level. Interlocking blocks move in 1 inch steps, Lumber moves in board-thickness steps of about 1.5 inches, the coarsest of the three, so it suits rough leveling and jack pads better than fine work.
Rated load against your rig
Compare the maker rating with the weight the leveling side actually carries, not the whole rig. Andersen rates its leveler to 30,000 lb, Beech Lane to 35,000 lb and Tri-Lynx to 40,000 lb, while Camco publishes no load rating for the 44510 and lumber has no rating at all. On a heavy rig, a published rating beats a guess.
Tire size and axle spacing
Curved levelers fit tires up to 32 inches in diameter, and Andersen notes roughly 2 to 3 inches of clearance between tandem tires for its leveler to fit. Tight tandem axles may need trimming on some curved levelers, while the Beech Lane stackable design is made 12 inches long to fit dual axles without cutting. Stacks and boards have no tire-size ceiling.
Ground surface
Firm pavement suits every option, but soft ground separates them. Plastic stacks can sink or distort on mud and loose gravel, and Camco users report adding a plywood base underneath on soft sites. Wide lumber boards spread load over more area, which is why boards keep winning on grass and sand. Clear rocks from under any stack.
Storage and weight you carry
A 10-pack of interlocking blocks weighs about 6.5 to 7.5 lb and nests into a bag, while a curved kit runs about 6 to 17 lb depending on the bundle. Boards are the outlier: a set of 2×12 stair-step boards is heavy, bulky and awkward in a small pass-through compartment. Tight storage favours blocks; a truck bed makes boards free to carry.
Jack-pad use as well as wheel use
Leveling does not end at the wheels: stabilizer, tongue and fifth-wheel jacks all need a foot that will not sink through soft ground. Camco rates its blocks for jack use, Tri-Lynx allows taller stabilizing stacks, and lumber cribbing is the traditional jack pad.
Which side fits your rig
No single side wins across rig types: tire size, axle spacing and jack travel decide.
| Rig | Leveling need | Side that fits best | Watch point |
|---|---|---|---|
| Single-axle travel trailer | Small lift, one wheel per side | Curved leveler | Tires up to 32 in only |
| Tandem-axle travel trailer | Both tires on the low side | Stack or 12 in curved | Fit between tires first |
| Fifth wheel | Heavy low side, long jacks | Stack plus lumber jack pads | Shorten jack travel |
| Class C motorhome | Moderate weight, tight storage | Curved leveler | 30,000 lb Andersen ceiling |
| Truck camper, small trailer | Light weight, small storage | Interlocking stack | One pack covers wheels and jacks |
| Heavy fifth wheel, Class A | High weight, soft sites | Lumber boards and pads | No published rating; build wide |
Leveling blocks vs wood by budget
| Tier | What you get | Example pick |
|---|---|---|
| Lowest cost | Scrap or new lumber, cut at home | DIY lumber boards |
| Good value | One interlocking pack for wheels and jacks | Camco 44510 or Tri-Lynx 00015 |
| Premium | Continuous adjustment, fastest setup | Andersen 3604-2 or Beech Lane |
No prices are printed here. The tiers rank money, weight and setup time: lumber is cheapest to buy and heaviest to carry, while curved levelers cost more up front and set up fastest.
Types of RV leveling support
| Type | Pros | Cons | Best for |
|---|---|---|---|
| Interlocking stack | Flexible height, light, packs small | 1 inch steps, can slide | Wheels and jacks, most rigs |
| Curved leveler | Continuous 0.5 to 4 in, fastest | 4 in ceiling, tire-size limit | Precise leveling, tandem trailers |
| Lumber under wheels | Cheapest, spreads load on soft ground | Heavy, bulky, coarse steps, rots | Budget setups, soft sites |
| Lumber under jacks | Shortens jack travel, stops wobble | No rating, cracks as it dries | Stabilizer and tongue jacks |
Detailed reviews: leveling blocks vs wood
Each review follows the same shape: why it is a pick, maker specs, fit, owner reports, who should skip it, and what to pair it with. Wood picks carry no Amazon button of their own, so each names its ready-made alternative with a button directly underneath.
Best overall: Andersen Camper Leveler 3604-2
Best overall — curved leveler for exact, one-move leveling
Why the Andersen Camper Leveler 3604-2 is our pick
The Andersen is our top pick because it removes the arithmetic from leveling. You drive onto the curved ramp, stop when the bubble reads level, and chock — anywhere from 0.5 to 4 inches, not just the nearest inch of a stack.
Andersen Camper Leveler 3604-2 key specs
- Part number: 3604-2
- Pack contents: 2 levelers and 2 chocks
- Lift range: 0.5 to 4 inches, continuous
- Rated load: 30,000 lb
- Leveler size: 15 x 5.75 x 3 inches
- Kit weight: 6.12 lb (2-pack record)
- Tire fit: up to 32 inches in diameter
- Tandem fit: about 2 to 3 inches between tires needed
- Bag kit variant: 3604-RTBA adds mats and a bag, 13.67 lb
- Warranty: Not published on the listing record used here
Andersen Camper Leveler 3604-2: fits and best for
Best for single-axle and tandem-axle travel trailers, fifth wheels and Class C motorhomes with tires up to 32 inches. Use one leveler per axle on the low side only; the high side stays on the ground.
Andersen Camper Leveler 3604-2 pros and watch-outs
- Continuous 0.5 to 4 inch adjustment, no block counting
- Fastest setup of any pick in this guide
- Rated to 30,000 lb, covering most towable rigs
- Chocks included, so nothing extra is needed to lock it
- Hard 4 inch ceiling — deeper sites need another plan
- Tire-size ceiling of 32 inches excludes some large tires
- Warranty figures conflict across secondary sources
- Can slip on snow and very smooth surfaces without mats
Andersen Camper Leveler 3604-2: what owners report
Owners on the iRV2 levelers thread report switching from stacked blocks to Andersen specifically to stop guessing at block counts, with several saying the levelers stayed in use across a third RV.
RV Forum users who moved from plastic blocks to Andersen describe fewer trips in and out of the cab and a level result on the first drive-on in most cases.
One owner review on Streaming Airheads warns that the levelers can be slippery in snow, so winter campers should plan on grip mats and a slower drive-on.
Andersen Camper Leveler 3604-2: who should not buy
Skip the Andersen if your tires are over 32 inches, your site needs more than 4 inches, or tandem spacing is too tight. The trailer winch guide is a better next read if the problem is moving the trailer rather than leveling it — otherwise the Tri-Lynx stack below covers deeper lifts.
Andersen Camper Leveler 3604-2: pair it with
Pair it with the Camco Bullseye Level below.
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Tip: place the level where you can see it from the driver seat, and stop the moment it reads level. See the utility trailer winch guide for trailer gear that pairs with this setup.
Best stackable: Camco Heavy-Duty Leveling Blocks 44510
Best stackable — one interlocking kit for wheels and jacks
Why the Camco Heavy-Duty Leveling Blocks 44510 is our pick
The Camco 44510 is the most versatile kit in this guide because one 10-pack does three jobs: wheel pyramids, jack pads and tongue-jack bases. Each block adds 1 inch, the interlocking design stops the stack from squirting out from under a tire, and the whole pack weighs 6.5 lb and nests with a carrying handle.
Camco Heavy-Duty Leveling Blocks 44510 key specs
- Part number: 44510
- Pack contents: 10 interlocking blocks with storage bag
- Block size: 8.5 x 8.5 x 1 inches (listing dimensions)
- Lift per block: 1 inch of stack height
- Material: UV-stabilized resin
- Pack weight: 6.5 lb
- Rated load: Not published
- Fits: single wheels, dual wheels, tandem axles
- Jack use: hydraulic, tongue, stabilizer and fifth-wheel jacks
- Warranty: Not published on the listing record used here
Camco Heavy-Duty Leveling Blocks 44510: fits and best for
Best for campers who want one kit for wheels and jacks, for dual-wheel and tandem-axle trailers, and for anyone short on storage. Build a pyramid for wheels, a flat stack for a jack foot, and a taller stack for a tongue jack.
Camco Heavy-Duty Leveling Blocks 44510 pros and watch-outs
- One kit covers wheels, jacks and tongue jacks
- Interlocking blocks resist sliding out under tires
- Light at 6.5 lb for 10 blocks, nests for storage
- UV-stabilized resin for outdoor seasons
- No published load rating, unlike the rated curved levelers
- 1 inch steps only — no fine adjustment between inches
- Can distort or sink on soft ground without a base board
- Block-height figures conflict: 1 inch lift vs a 1.5 inch secondary measurement
Camco Heavy-Duty Leveling Blocks 44510: what owners report
An RV Forum user who replaced 2×6 lumber with Camco blocks reports they are far superior in design and use, and warns that loose lumber or loose blocks tend to squirt out while interlocking blocks do not.
The same thread recommends a half-inch plywood base under the blocks on dirt, mud or gravel to stop distortion.
Getaway Couple notes the carrying handle and the wider 4×2 variant for dually tires, and the same soft-surface warning: plan on a mat or board where the ground is soft.
Camco Heavy-Duty Leveling Blocks 44510: who should not buy
Skip the Camco stack if you need fine adjustment between inches, or want a published load rating. The Andersen above gives continuous adjustment, and the Tri-Lynx below publishes a 40,000 lb rating — see also boat trailer winch guide if your trailer work is at the ramp rather than the campsite.
Camco Heavy-Duty Leveling Blocks 44510: pair it with
Pair it with the Camco Bullseye Level below.
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Tip: build the pyramid on flat ground first and count blocks before driving on. The car trailer sizing guide covers matching trailer gear to trailer weight.
Best proven classic: Tri-Lynx Lynx Levelers 00015
Best proven classic — the original interlocking block, made in the USA since 1992
Why the Tri-Lynx Lynx Levelers 00015 is our pick
Tri-Lynx invented the interlocking leveling block category, and the 00015 is still the reference stack other blocks are compared with. The maker rates it to 40,000 lb — the highest published rating in this guide — and caps leveling pyramids at 5.5 inches, deeper than any curved leveler here.
Tri-Lynx Lynx Levelers 00015 key specs
- Part number: 00015
- Pack contents: 10 blocks with nylon bag
- Block size: 8.5 x 8.5 inches
- First block: 1.5 inches high, giving 1 inch of lift
- Each added block: 1 inch of lift
- Rated load: 40,000 lb (Tri-Lynx FAQ)
- Leveling pyramid max: 5.5 inches (5 levelers)
- Stabilizing stack max: 8.5 inches (8 levelers)
- Pack weight: 7.5 lb
- Warranty: 10 years with online registration within 21 days
Tri-Lynx Lynx Levelers 00015: fits and best for
Best for heavy travel trailers, fifth wheels and motorhomes, for sites needing more than 4 inches of lift, and for campers who also want tall stabilizing stacks under jacks.
Tri-Lynx Lynx Levelers 00015 pros and watch-outs
- Highest published rating here at 40,000 lb
- Deepest leveling pyramid at 5.5 inches
- 10-year warranty on registration
- Three decades of production and a deep accessory range
- 1 inch steps, like every stack — no fine adjustment
- Maker warns against muddy ground prone to sinking
- Must not be mixed with non-Lynx materials, including wood
- Listing weight fields are corrupted; only the maker 7.5 lb figure is reliable
Tri-Lynx Lynx Levelers 00015: what owners report
iRV2 users report pairing Lynx Levelers with squares cut from a stall mat to stop sliding, and note that backing onto the blocks on concrete can push them if the approach is not straight.
Airforums users report the same backing-up slip, but also building a tall pyramid under one wheel to lift the other axle wheel for bearing checks.
The RV Geeks Lynx review repeats the maker 40,000 lb figure and the 10-year warranty, and notes the LynxCap topper that gives a flat surface on top of a pyramid.
Tri-Lynx Lynx Levelers 00015: who should not buy
Skip the Tri-Lynx stack if you want fine adjustment rather than inch steps, or level mostly on muddy ground. The Andersen above suits fine adjustment, and lumber boards below spread load better on soft sites — see electric trailer winch guide for powered trailer gear.
Tri-Lynx Lynx Levelers 00015: pair it with
Pair it with the BAL X-Chock below.
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Tip: build two pyramids, one per wheel on the low side, and chock the rear one so you know when to stop. The hand winch for car trailers guide covers manual trailer handling.
Best heavy-duty curved: Beech Lane Camper Leveler
Best heavy-duty curved — nylon-polymer curved leveler rated to 35,000 lb
Why the Beech Lane Camper Leveler is our pick
The Beech Lane is the curved leveler to choose when the trailer is heavy. Its high-performance nylon-polymer build is rated to 35,000 lb, above the Andersen 30,000 lb figure, and the kit includes rubber grip mats, chocks and a carry bag as standard — the mats answer the slipperiness complaint that follows curved levelers.
Beech Lane Camper Leveler key specs
- Part number: BL-115-SIZE
- Pack contents: 2 curved levelers, 2 chocks, 2 grip mats, carry bag
- Lift range: 0.5 to 4 inches
- Rated load: 35,000 lb
- Material: high-performance nylon polymer with rubber mats
- Package size: 15.2 x 12.6 x 5.35 inches
- Kit weight: 16.8 lb (bag version record; 16.74 lb on another listing record)
- Tire fit: curved levelers of this type suit tires up to about 32 inches
- Dual-axle note: related 12 inch stackable design fits dual axles without cutting
- Warranty: Not published on the listing record used here
Beech Lane Camper Leveler: fits and best for
Best for heavier travel trailers and fifth wheels where a curved leveler is wanted but the Andersen rating feels tight, and for campers who want mats included rather than bought separately.
Beech Lane Camper Leveler pros and watch-outs
- Highest-rated curved leveler here at 35,000 lb
- Grip mats included, tackling the slip complaint directly
- Continuous 0.5 to 4 inch adjustment like Andersen
- Full kit in one bag: levelers, chocks, mats
- Heaviest curved kit here at 16.8 lb
- Same 4 inch ceiling as every curved leveler
- Owner coverage for this exact kit is thin in our sources
- Warranty not published on the listing record used
Beech Lane Camper Leveler: what owners report
Owner coverage for this exact kit is thin in the sources retrieved, so this guide invents no owner quotes for it: the iRV2 levelers thread records a buyer choosing Beech Lane over Andersen specifically because the rubber traction mat was included, and choosing it for exact leveling after using stacked blocks.
The RV Owner HQ roundup lists the Beech Lane kit as its most durable pick, citing the nylon-polymer build, the 0.5 to 4 inch range and the included grip mats.
Beech Lane Camper Leveler: who should not buy
Skip the Beech Lane if pack weight matters most — at 16.8 lb it is the heaviest curved kit here — or if you need over 4 inches. The Andersen is lighter, and the Tri-Lynx stack above reaches 5.5 inches; see car trailer winch guide for related trailer equipment.
Beech Lane Camper Leveler: pair it with
Pair it with the Camco Bullseye Level below.
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Tip: put the grip mat under the leveler, not on top — the mat grips the ground, the leveler grips the tire. The essential winching accessories guide covers the rest of the safety kit.
Best budget: DIY Lumber Boards Under Wheels
Best budget — hardware-store boards, cheapest lift for a heavy rig
Why the DIY Lumber Boards Under Wheels is our pick
Lumber is the oldest leveling system and still the cheapest: a pair of 2×10 or 2×12 boards, cut to length and sometimes screwed into stair-step stacks, will lift any rig that fits on them. Forum users build 1 ft, 2 ft and full-length tiers and drive up while watching a bubble level.
DIY Lumber Boards Under Wheels key specs
- Product: hardware-store 2×10 or 2×12 boards, cut to length
- Build: single boards or screwed stair-step stacks
- Lift per step: about 1.5 inches per nominal 2 inch board
- Rated load: Not published — no maker rating exists
- Width rule: at least as wide as the tire tread
- Tandem rule: support both tires on the low side
- Weight: heavy and bulky compared with plastic kits
- Warranty: Not published — none applies
- Durability: can rot, split and crack as it dries
- Fixing: screw and glue cross-grain layers
DIY Lumber Boards Under Wheels: fits and best for
Best for budget setups, heavy rigs, soft ground where load-spreading matters, and campers with truck-bed storage.
DIY Lumber Boards Under Wheels pros and watch-outs
- Cheapest option in this guide by a wide margin
- Spreads load on soft ground better than small blocks
- No tire-size or brand ceiling — cut to fit
- Available anywhere, replaceable in an afternoon
- Heavy and bulky to carry and store
- Coarse 1.5 inch steps — exact level is hard
- Loose stacks can slide and collapse under braking
- Rots, splits and cracks with age and weather
DIY Lumber Boards Under Wheels: what owners report
RV Forum users report stair-step 2×12 builds that level a trailer in a few drive-on attempts, and stress boards must cover the full tire tread.
An iRV2 thread on boards warns that unsecured stacks slide under hard braking, and recommends pinning or screwing stacks together.
Airforums users report scrap treated lumber works, and plastic blocks scooted on their sites too.
DIY Lumber Boards Under Wheels: who should not buy
Skip loose lumber if you will not screw or pin the stack together, or if storage is tight The Tri-Lynx stack below is the ready-made substitute, and winch recovery kit guide covers the safety gear for trailer work.
DIY Lumber Boards Under Wheels: pair it with
Pair it with the Camco Bullseye Level below.
Affiliate-gate alternative, directly under this pick: plain lumber has no Amazon listing, so there is no lumber button to print. If you want the same job without cutting lumber, the Tri-Lynx Lynx Levelers 00015 stack is the closest ready-made substitute, and its button is directly below this note.
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Tip: screw the tiers together and cut the drive-on ends at 45 degrees — the angle makes the climb smoother and the screws stop the kick-out. The recovery shackles guide covers rated recovery hardware.
Best for jacks: Lumber Cribbing Under Jacks
Best for jacks — cross-grain boards that shorten jack travel
Why the Lumber Cribbing Under Jacks is our pick
Cribbing is lumber’s second job, where wood arguably beats plastic outright. A pair of boards glued and screwed cross-grain under a stabilizer foot, tongue jack or front jack shortens how far the jack must extend — and owners report that less extension means less wobble when moving around inside. Boards also spread the foot over soft ground.
Lumber Cribbing Under Jacks key specs
- Product: cross-grain board pairs, commonly 12 x 12 inches
- Build: two boards glued and screwed at 90 degrees to each other
- Thickness: about 3 inches per cross-grain pair in forum builds
- Rated load: Not published — no maker rating exists
- Use: stabilizer jacks, tongue jacks, front jacks
- Foot rule: wide enough for the whole jack foot, with margin
- Benefit: shorter jack extension, less wobble
- Durability: single boards can crack as they dry; pairs resist it
- Weight: heavy compared with plastic jack pads
- Warranty: Not published — none applies
Lumber Cribbing Under Jacks: fits and best for
Best for motorhomes and fifth wheels with long jack travel, soft sites where feet sink, and seasonal campers.
Lumber Cribbing Under Jacks pros and watch-outs
- Shortens jack travel and cuts down on wobble
- Spreads jack feet over soft ground
- Cheapest jack-pad option available
- Easy to replace one cracked board at a time
- No published load rating
- Heavy to carry in sets of four or six
- Single boards crack as they dry out
- Takes more storage than a set of plastic pads
Lumber Cribbing Under Jacks: what owners report
An iRV2 thread reports using 2×12 boards under jacks to minimize extension: more extended pistons mean more wiggle as people move around.
The same thread warns single boards crack as they dry, and cross-grain pairs are much more durable.
One RV Forum user dropped 1×6 deck-board pieces under stabilizer jacks as unneeded weight.
Lumber Cribbing Under Jacks: who should not buy
Skip cribbing if your jacks already reach the ground with little extension, or if you want a rated, bagged kit. The Camco 44510 stack below is rated by Camco for jack use, and snatch block guide covers rated rigging for heavier jobs.
Lumber Cribbing Under Jacks: pair it with
Pair it with the Camco Bullseye Level below.
Affiliate-gate alternative, directly under this pick: lumber cribbing has no Amazon listing, so there is no cribbing button to print. If you would rather buy than cut, the Camco 44510 stack is rated by Camco for stabilizer and jack use, and its button is directly below this note.
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Tip: cross the grain, glue and screw the pair, and cover the whole jack foot plus a margin. The winch maintenance checklist is a good pre-trip habit to copy for jack gear.
Spec comparison
Blocks side first. Every figure comes from the maker or listing records in the research notes; where a maker publishes nothing, the cell says so.
| Spec | Andersen 3604-2 | Camco 44510 | Tri-Lynx 00015 | Beech Lane |
|---|---|---|---|---|
| Type | Curved leveler | Interlocking stack | Interlocking stack | Curved leveler |
| Max lift | 4 in | 1 in per block | 5.5 in pyramid | 4 in |
| Rated load | 30,000 lb | Not published | 40,000 lb | 35,000 lb |
| Pack contents | 2 levelers, 2 chocks | 10 blocks, bag | 10 blocks, bag | 2 levelers, chocks, mats, bag |
| Kit weight | 6.12 lb | 6.5 lb | 7.5 lb | 16.8 lb |
| Tire and axle fit | Up to 32 in tires | Single, dual, tandem | Single, dual, tandem | Curved fit, mats included |
| Warranty | Not published | Not published | 10 years, registered | Not published |
| Check Price |
Wood side. Neither carries a maker rating — the numbers that matter for lumber are board size, grain direction and inspection, not a printed load figure.
| Spec | Lumber boards (wheels) | Lumber cribbing (jacks) |
|---|---|---|
| Type | Wood boards under wheels | Wood pads under jacks |
| Max lift | Board-thickness steps | Board-thickness steps |
| Rated load | Not published | Not published |
| Build | 2×10 or 2×12, stair-step | Cross-grain pairs, 12 x 12 in |
| Kit weight | Heavy and bulky | Heavy in sets of four or more |
| Best ground | Soft ground, load spreading | Soft ground, jack feet |
| Warranty | Not published | Not published |
| Check Price |
The wood-side buttons above are the affiliate-gate alternatives from each wood review: Tri-Lynx for wheel boards, Camco for jack cribbing. Plain lumber has no Amazon button, and none is invented here.
Installation and fitment basics
Leveling is a driving maneuver, not a jacking job: park on the firmest ground, read the bubble level, and place the low-side supports before moving. For curved levelers, push the thin end tight to the tire, drive on slowly until level, then slide the chock in.
Never level a rig with stabilizer jacks alone: jacks stabilize, they do not lift a rig into level, and lifting a wheel clear changes the load path through the frame. Level side to side with wheels first, then level front to back with the tongue jack, then drop the stabilizers onto pads. Re-check the bubble after the slides go out, since a slide-out shifts weight to one side.
Fitment checks: measure tandem spacing before ordering a curved leveler, confirm boards or stacks cover the full tire tread, and clear rocks from under any stack. Related reading: how to use a winch for safe pulling practice, winch recovery kit guide for the safety gear to carry, and utility trailer winch guide for trailer equipment.
Safety essentials
1. Chock both directions on the leveled side before unhitching or opening slides.
2. Never place any part of your body under a rig resting only on blocks or boards.
3. Never stack interlocking blocks higher than the maker limit: 5.5 inches for Tri-Lynx leveling pyramids.
4. Support both tires on a tandem side; one tire carrying a side load damages sidewalls over time.
5. Never level with stabilizer jacks alone — level on the wheels first, then stabilize.
6. Inspect boards for cracks and blocks for distortion before every trip, and retire cracked boards.
Three accessories that make leveling safer, each with its own button:
Camco Bullseye Level 25573 — a round domed level reading 360 degrees at once. Check Price
BAL X-Chock 28012 — a scissor chock locking between tandem tires. Check Price
Camco Curved Leveler 44423 — a curved leveler with its own wheel chock, rated to 30,000 lb. Check Price
More safety context: essential winching accessories and winch recovery kit guide.
Troubleshooting
| Symptom | Likely cause | Fix |
|---|---|---|
| Blocks slide when driving on | Smooth ground, angled approach | Approach straight, add a mat or plywood base |
| Stack sinks into the ground | Soft site, small footprint | Use wide lumber boards or a plywood base |
| Curved leveler will not fit tandem | Tires too close together | Measure spacing first; trim only where allowed |
| Cannot hit exact level | 1 inch stack steps | Switch to a curved leveler for continuous adjustment |
| Lumber stack kicks out | Loose boards, hard braking | Screw and pin the stack; drive on slowly |
| Rig still rocks after leveling | Jacks over-extended | Add cribbing under jack feet to shorten travel |
Who should NOT buy these
Do not buy curved levelers if your site regularly needs more than 4 inches. The 4 inch ceiling is a hard limit on both curved picks; stacking on top of one is not maker-approved. Buy a stack or move to a flatter spot instead — see trailer winch guide if repositioning the trailer is the real problem.
Do not buy interlocking stacks if you level mostly on mud. Tri-Lynx warns against muddy ground prone to sinking, and Camco users add base boards for the same reason. Wide lumber boards are the honest answer on soft sites, and the electric trailer winch guide is worth reading if the trailer also needs powered moving.
Do not buy lumber if you will not build it properly. Loose stacks are the version owners report collapsing, and single boards crack as they dry. If the lumber will stay loose in a compartment, buy the Tri-Lynx stack instead — the affiliate-gate alternative in the lumber reviews.
Do not buy any of these if your rig has automatic hydraulic leveling. A rig that levels itself needs jack pads, not wheel levelers — the cribbing review and the Camco stack cover that job. Spend the money on pads and chocks.
Final verdict
The verdict splits by use case, not brand: blocks win on precision, packing and repeatability; wood wins on cost, soft ground and jack work.
Best overall: Andersen Camper Leveler 3604-2 — Check Price
Best stackable: Camco Heavy-Duty Leveling Blocks 44510 — Check Price
Best proven classic: Tri-Lynx Lynx Levelers 00015 — Check Price
Best heavy-duty curved: Beech Lane Camper Leveler — Check Price
Best budget: DIY Lumber Boards Under Wheels — ready-made alternative: Check Price
Best for jacks: Lumber Cribbing Under Jacks — ready-made alternative: Check Price
If you buy one system today, buy the Andersen for a trailer you move often, the Tri-Lynx stack for a heavy rig, and keep cross-grain boards for the jacks. That covers precision, depth and soft ground at once.
FAQ
Are leveling blocks better than wood?
For most campers, yes: blocks and curved levelers are lighter, nest into a bag, and adjust in known steps or continuously. Wood wins on cost and on soft ground, where wide boards spread load better than small plastic feet. The better choice depends on your site.
How much lift can leveling blocks give?
Curved levelers give 0.5 to 4 inches continuously. Interlocking stacks give 1 inch per block, with Tri-Lynx capping leveling pyramids at 5.5 inches. Lumber gives about 1.5 inches per nominal 2 inch board. Over 5.5 inches, find a flatter spot.
Can wood boards damage tires or the rig?
Boards themselves do not damage tires when they are wide enough for the full tread and support both tires on a tandem side. The reported damage comes from leveling on one tire of a pair, which overloads its sidewalls, and from loose stacks collapsing under braking. Screw stacks together.
Do leveling blocks work on soft ground?
They work with help: a plywood base or grip mat under the stack stops sinking and distortion on grass, sand and loose gravel. On genuinely muddy ground, wide lumber boards are the better answer, since they spread weight over a larger area.
What size boards do I need for leveling?
Use 2×10 or 2×12 boards, at least as wide as the tire tread, and long enough for both tires on a tandem side. Cut the drive-on ends at 45 degrees for a smoother climb, and screw stair-step tiers together so the stack cannot kick out.
Can I level with stabilizer jacks instead?
No. Stabilizer jacks stabilize; they are not made to lift a rig into level, and lifting a wheel clear on a jack changes the load path through the frame. Level on the wheels first, then drop the stabilizers onto pads.
Do I need a leveler for each axle?
On a tandem-axle trailer, yes: one leveler or stack per wheel on the low side, so both tires share the load. Curved levelers need enough clearance between the tires to fit — Andersen notes about 2 to 3 inches. Stacks and boards have no such spacing limit.
How do I stop blocks from sliding?
Approach straight rather than at an angle, use the grip mats that come with curved kits, and put a plywood base under stacks on smooth or soft ground. For lumber, screw tiers together and drive on slowly. Never brake hard on a stack.
What should I use under the jacks?
Cross-grain lumber pairs are the traditional answer: two boards glued and screwed at 90 degrees, wide enough for the whole jack foot, which shorten jack travel and cut wobble. Camco 44510 blocks are the bagged alternative. Inspect boards for cracks before each trip.
Sources & changelog
Maker and listing sources: Tri-Lynx FAQ (40,000 lb rating, 5.5 inch leveling limit), Andersen 3604-2 listing (30,000 lb, 4 inch lift, tandem spacing), Camco 44510 listing (block size, 1 inch per block, jack uses), Tri-Lynx 00015 listing (part number, 7.5 lb pack), Beech Lane leveler listing (BL-115-SIZE, kit contents), Beech Lane stackable manual (dual-axle fit).
Owner and secondary sources: RV Forum leveling boards thread, RV Forum leveling blocks thread, iRV2 leveling-block question, iRV2 boards question, Airforums blocks poll, The RV Geeks Lynx review, The RV Geeks Andersen review, The Camping Nerd Andersen guide, Getaway Couple Camco review, Reset Your Journey Camco review, Streaming Airheads Andersen review, RV Owner HQ roundup.
Changelog — October 30, 2026: guide first published.
Category: this guide belongs under Leveling Blocks, within RV & Camper Accessories.
By Leo, Founder, WinchInsider
Leo founded WinchInsider to give trailer and RV owners research-based buying guides: maker specs checked against owner reports, with no testing claims and no invented figures.
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