When stabilizing a dump trailer with a fifth wheel or tongue jack, choosing the right jack blocks is essential for safety and stability. This guide highlights five strong options, explaining who each is best for and why it stands out. Ideal buyers include frequent campers who park on uneven ground, owners of heavy trailers needing up to 40,000+ lbs support, and users seeking easy stacking and portability. Below is a quick summary table of the featured products to help you compare at a glance.
| Product | Best For | Key Benefit |
|---|---|---|
| 6”Height Trailer Jack Block with Carry Bag — 40,000 lbs | Heavy-duty tandem trailers and 5th wheels | High load capacity with stackable design |
| Basima Trailer Jack Blocks Set of 4 — 6″ | All-terrain RVs and campers | Upgraded internal structure, versatile as seats or steps |
| RVMATE 12 Pack RV Leveling Blocks | Multiple vehicle setups and long trips | Interlocking design, strong level support |
| Andersen Hitches 2-Pack Leveling Stabilizers | Simple, magnet-secured setup | Magnets for secure placement |
| CircleRoad 4 Pack Trailer Jack Block | Budget-friendly, reliable stability | UV-resistant and up to 10,000 lbs per block |
6” Height Trailer Jack Block with Carry Bag
Brand: KIKIRV
Best for: Heavy-duty applications where the trailer requires substantial stabilization, such as long or heavy fifth-wheel setups. The 40,000-pound support rating makes it suitable for demanding loads.
Why selected: This block emphasizes durability with a high-performance polymer that resists UV, oil, water, heat, and stains. It is designed to adapt to uneven terrain and prevent wobble, and its stackable height adjustment allows precise leveling from 6 inches upward.
Caution: While the blocks are stackable, ensure secure locking when height is increased and avoid exceeding recommended stacking heights on soft ground.
Basima Trailer Jack Blocks Set of 4 — 6″
Brand: Basima
Best for: RVs or campers needing a durable, multi-use solution with a higher stability emphasis. The set’s stacking and 50% increased bearing capacity offer solid performance for varied terrains.
Why selected: This block set balances strength and stability, with an upgraded internal structure that increases capacity and side holes for easy handling. The kit’s versatility extends beyond leveling to potential use as seats or steps when not in use.
Caution: The enhanced design improves stability, but always verify proper seating and contact with the jack pad to prevent shifting on slick surfaces.
RVMATE 12 Pack RV Leveling Blocks
Brand: RVMATE
Best for: Vehicles that require multiple blocks with reliable stacking capability. The 12-pack provides ample blocks for various axle configurations or dual-wheel setups.
Why selected: The blocks offer level assistance on uneven surfaces, with interlocking features to reduce movement and tire wear. They are designed to interlock and stack for adaptable height adjustments.
Caution: Ensure that tire contact with the top blocks is minimized by using top covers to prevent wear on the block faces.
ANDERSEN HITCHES 2-Pack Leveling Stabilizers
Brand: Andersen Hitches
Best for: Quick, magnet-assisted setup when you want to stabilize a single area at a time with minimal fuss.
Why selected: The two-block design supports multiple stabilizers, helping you set up faster. Magnets secure blocks to the jack pad, reducing shifting during campsite setup.
Caution: Magnets work best on compatible round jack pads; verify compatibility with your trailer’s jacks to ensure a secure fit.
Original USA Made Strongest Trailer Jack Blocks — 4 Pack
Brand: bullke
Best for: Users needing a robust, heavy-duty option with American-made quality and UV resistance for long outdoor use.
Why selected: Promotes strength with forged-style plastic and UV resistance, supporting up to 18,000 lbs per block. It also highlights versatility for various trailer types and sets.
Caution: The surface may appear irregular due to the forging method; ensure stable contact with the jack pad for safe use.
VEVOR Trailer Jack Blocks, 8″ High — 8 Pcs Kit
Brand: VEVOR
Best for: Campers needing a complete leveling kit with multiple blocks and pads, suitable for various terrains.
Why selected: A complete leveling kit with six cylindrical blocks and two pads broadens the support area. The set is designed to work with round or square legs for wide compatibility.
Caution: Weight capacity per block is 2000 lbs; distribute load appropriately and avoid stacking beyond the recommended limits.
KJE 4PCS RV Trailer Jack Block — 6″ High
Brand: KJE
Best for: Users seeking secure stacking with anti-slip and large-capacity blocks that stay in place on uneven terrain.
Why selected: Features a robust 10,000-pound per-block capacity, interlocking grooves for stable stacking, and reinforced bottoms to prevent sinking.
Caution: Some surfaces may require additional top pads to minimize wheel contact; ensure proper alignment with the jack system for best results.
Buying Guide: How to Choose the Right Fifth Wheel Jack Blocks
- Load capacity: Identify the maximum weight your trailer’s jack and stabilizers will impose. Choose blocks rated well above your typical load to avoid deformation or slipping.
- Height range and stacking: Decide if you need fixed height, adjustable via stacking, or both. Ensure the design locks securely to prevent shifting.
- Material and durability: Look for UV, oil, water, heat, and abrasion resistance. High-density polymers or reinforced plastics are common choices.
- Terrain versatility: If you camp on grass, gravel, dirt, or asphalt, select blocks designed for multi-terrain stability and non-slip surfaces.
- Compatibility: Check top surface shapes and bottom contact features to match your tongue jacks, wheel jacks, scissor stabilizers, and 5th wheel hydraulics.
- Portability and storage: Consider bundle sizes, carry bags, and weight. A compact, carry-friendly option improves transportability.
Frequently Asked Questions
- What load capacity do I need for a typical 5th wheel dump trailer?
Look for blocks rated well above your trailer’s estimated load to maintain stability and safety during leveling and setup.
- Should I use 2-pack or 4-pack sets?
Two-block sets are sufficient for simple stabilization; four- or more-block kits are better for complex anchoring or multiple stabilizers.
- Are magnets on leveling blocks effective for all jack pads?
Magnets work best with compatible round jack pads; verify pad shape and material to ensure a secure hold.
- Can I use these blocks for non-trailer applications?
Yes, many blocks are designed for various RVs, campers, and outside setups, including as seats or steps when not in use.
- How do I prevent wobble on uneven ground?
Use the appropriate number of blocks, stack evenly, and verify the top contact with each jack pad to maximize stability.
- What maintenance is recommended for plastic leveling blocks?
Keep them clean, dry, and free from stored debris; inspect for cracks or wear and replace as needed to maintain safety.