Answering the common question “which trailer jack block should I choose for stable leveling?” this guide reviews five reliable options that fit a range of RV sizes and terrain. The best picks balance weight capacity, stacking versatility, and ease of use. It’s ideal for travelers, full-time RVers, and hobbyists who want dependable, portable leveling solutions. The top picks below are evaluated for suitability to tongue jacks, stabilizers, and general trailer supports on grass, gravel, dirt, or pavement. A quick buying table is included to compare essentials at a glance.
Product overview at a glance:
- OX BLOX Heavy Duty Trailer Jack Block — Best overall for high weight capacity and universal jack compatibility.
- Trailer Jack Block by Hyfico — Best balance of capacity, portability, and compact design.
- RV Trailer Jack Block by Vacallity — Best for durable HDPE construction and broad jack compatibility.
- HOXWELL 6″ H Trailer Jack Block — Best for heavy-duty stability with simple stacking and portability.
- ROBLOCK 6”H Trailer Jack Block — Best value with robust balance and versatile use.
OX BLOX Heavy Duty Trailer Jack Block
Features at a glance: rated up to 10,000 lbs per block; designed for tongue jacks, post jacks, foot jacks, scissor jacks, and stabilizers; suitable for travel trailers, 5th wheels, campers, and more; patented stability to reduce wobble on gravel, grass, dirt, and pavement; stackable for extra height with continued 10,000 lbs capacity even when stacked.
Who it’s best for: larger trailers and heavy-duty applications where higher load capacity and stability are critical. This block is a strong pick for campsite setups or job-site uses where extra lift is needed. Why chosen: its claimed capacity and stabilizing design target the most demanding tongue jacks and stabilizers, offering solid performance on uneven ground.
Caution or limitation: stacking multiple blocks adds height but can complicate setup on very uneven terrain; ensure a level base before proceeding.
Trailer Jack Block By Hyfico
Features at a glance: up to 20,000 lbs capacity per block; upgradable design with stable stacking and side holes; compact size to save storage space; HDPE material provides corrosion resistance and UV stability; supports various jacks and stabilizers on grass, gravel, dirt, or asphalt.
Who it’s best for: users needing very high stackable capacity in a compact form, with broad compatibility for different jack styles. Why chosen: its higher per-block rating and improvements in drainage help in outdoor use where weather exposure is a factor.
Caution or limitation: while space-efficient, the compact profile may require careful placement on soft ground to prevent sinking; use alongside broader base support if terrain is very soft.
RV Trailer Jack Block by Vacallity
Features at a glance: HDPE construction for durability; broad compatibility with tongue jacks, posts, feet, stabilizers; anti-slip design details to reduce movement; stackable design that increases height with multiple blocks; designed for heavy-duty outdoor use on grass, gravel, dirt, or pavement.
Who it’s best for: RV owners who want a dependable, versatile block that works with many jack types and terrains. Why chosen: emphasis on anti-slip and stacking utility helps achieve stable leveling on uneven lots or campsite surfaces.
Caution or limitation: data notes do not specify exact weight per block beyond overall capacity; check weight limits for your specific jack configuration before use.
HOXWELL 6″ H Trailer Jack Block
Features at a glance: 6-inch height; GVW up to 40,000 lb (18 tons) capacity; stackable and portable with handle; built to reduce sway on grass, gravel, or mud; built-in weep hole for drainage to prevent moisture buildup.
Who it’s best for: campers and heavy vehicles that frequently park on varying ground grades and need a robust, portable solution. Why chosen: exceptionally high published load tolerance and practical draining feature help maintain stability in adverse ground conditions.
Caution or limitation: heavier blocks may require more effort to lift and stack; consider using with a second set for very tall leveling when ground is uneven.
ROBLOCK 6”H Trailer Jack Block
Features at a glance: high-performance polymer; UV-resistant for long outdoor use; GVW up to 40,000 lbs per block; supports tongue jacks, posts, feet, stabilizers including round, square, or scissor types; stackable height adjustments to match uneven surfaces.
Who it’s best for: RV owners seeking a versatile, economical option with broad compatibility and strong outdoor durability. Why chosen: the all-around compatibility and durable polymer design make it a reliable, everyday block for diverse rigs.
Caution or limitation: ensure correct alignment when stacking to avoid uneven load distribution; verify the total height when stacking to prevent roof clearance issues on taller rigs.
Buying Guide
What matters most: capacity and compatibility
Choose blocks that can handle your RV’s tongue jack and stabilizers, with a comfortable safety margin above your heaviest expected load. Look for models that explicitly state compatibility with tongue jacks, post jacks, feet, stabilizers, and scissor jacks.
Material and durability
HDPE and high-performance polymers resist weathering, UV exposure, and cracking. A modular, stackable design helps you adjust height for uneven ground while maintaining footprint stability.
Stability on different surfaces
Blocks with anti-slip features and wider bases reduce wobble on grass, gravel, dirt, and pavement. If you frequently camp on soft ground, a wider base and higher capacity can prevent sinking.
Ease of use and storage
Portability matters for travel. Blocks with handles or a compact design fit easily into RV storage spaces. Stacking capability is essential when adjustments are needed for tall or uneven approaches to leveling.
Practical setup tips
- Place on a firm, level surface when possible; if not, use a larger bag or mat to distribute weight.
- Stack gradually and test stability before lowering the trailer fully onto the blocks.
- Check for even contact between the block surface and the jack foot; adjust as necessary to avoid tilting.
Frequently asked questions
- What is the typical load capacity I should look for in trailer jack blocks?
Choose blocks with a higher capacity than your heaviest jack or stabilizer. Many options support 8,000–20,000+ lbs per block; select based on your RV’s total weight and setup.
- Can I stack multiple blocks for greater height?
Yes, many models are designed to be stacked. Ensure the top surfaces align and the load remains evenly distributed to prevent tipping.
- Are HDPE blocks resistant to weather and UV exposure?
Yes, HDPE and similar polymers are chosen for outdoor use due to durability and UV resistance, helping blocks last longer in sun and rain.
- Which factor most affects stability on soft ground?
Block base size and overall weight distribution. A wider base and higher weight capacity reduce sinking and wobble on grass or mud.
- Should I buy a single block or a set?
For most trailers, a set with multiple blocks is preferred to achieve the desired height and balance on uneven terrain.
