Tongue jacks and jack wheels
Which electric trailer tongue jack matches your actual tongue weight?
An electric tongue jack replaces a manual crank with a motor and a button, and the practical difference it makes has nothing to do with laziness. Hitching a trailer alone means watching the coupler drop onto the ball while adjusting height at the same time, and a hand crank forces a choice between watching the connection and turning the handle. An electric jack lets both happen together, which is the entire reason this category exists rather than a comfort upgrade.
Capacity numbers on a tongue jack listing are more layered than they look. Manufacturers commonly publish two different figures: a dynamic load rating, which is what the jack can actually lift and lower under motion, and a separate, larger static rating, which is what it can hold once it is stopped and simply bearing weight. The Kohree 4,000 lb jack, for example, publishes a 4,000 lb dynamic rating alongside a 6,000 lb static one. The number to shop by is the dynamic figure, because that is what determines whether the jack can actually raise your loaded tongue off the truck receiver in the first place, not just hold it once it is already up.
Match the jack to your measured tongue weight, not to the trailer's total weight or to the biggest number on a listing. A typical conventional trailer runs 10 to 15 percent of its loaded weight on the tongue, so a 7,000 lb trailer carries somewhere around 700 to 1,050 lb there, well inside either jack on this page. A jack rated well beyond what your trailer actually needs is not dangerous, it is simply an unnecessary expense, while one rated below your tongue weight will struggle or fail to lift at all.
On this page
- Beginner: enough lift for a smaller trailer at a lower price
- Intermediate: the buy-once capacity for most travel trailers
- Expert: past 7,500 lb, and the accessory serious riggers add alongside it
- Match the jack to your actual tongue weight, not the biggest number
- What should you confirm on your own trailer before ordering?
- Why bother with electric over a hand crank at all?
Beginner: enough lift for a smaller trailer at a lower price
This tier is correct once your measured tongue weight comfortably fits under the rating, and there is no reason to pay for capacity a smaller trailer will never need.
Kohree Electric Trailer Jack, 4,000 lb, A-frame
$99.10A 4,000 lb dynamic lift rating with a 6,000 lb static holding rating, an adjustable drop leg and dual LED lights, at roughly half the price of the larger Kohree jack.
Best for: A smaller travel trailer with a tongue weight comfortably under 600 lb.
Check price on AmazonIntermediate: the buy-once capacity for most travel trailers
This is the sensible default rather than the cautious upgrade, because the price difference over the smaller jack is modest compared with the added capacity and the two genuinely useful features it adds.
Kohree Electric Trailer Jack, 7,500 lb, with 7-way plug and built-in level
$189.99A 7,500 lb dynamic lift rating, a built-in bubble level so the trailer can be levelled while it is being raised, and a 7-way plug that draws power from the tow vehicle rather than the trailer's own battery.
Best for: Most travel trailers, with real headroom for a heavier one later without needing to buy a second jack.
Check price on AmazonExpert: past 7,500 lb, and the accessory serious riggers add alongside it
CURT 28276 Caster Trailer Jack Wheel, 6 inch, 1,200 lb
$22.63A replacement caster jack wheel rated to 1,200 lb, which lets an unhitched trailer be rolled sideways by hand into a tight spot rather than lifted and walked around, used alongside whichever jack does the actual raising and lowering.
Best for: Maneuvering a trailer in a tight site once it is already off the tow vehicle, in addition to an electric jack rather than instead of one.
Check price on AmazonWho should not buy this tier: Anyone shopping for a jack that lifts and lowers electrically. This is a manual wheel for hand-rolling an unhitched trailer, not a power jack, and it does not compete with or replace the Kohree 7,500 above. For a tongue weight genuinely above what these two Kohree jacks publish, no verified electric jack past 7,500 lb turned up a traceable listing in this catalog; search that exact capacity here and confirm a real published dynamic lift rating before trusting any number you find.
Match the jack to your actual tongue weight, not the biggest number
The Kohree Electric Trailer Jack, 4,000 lb, A-frame publishes a 4,000 lb dynamic rating and a separate 6,000 lb static one, while the Kohree Electric Trailer Jack, 7,500 lb, with 7-way plug and built-in level is rated 7,500 lb.
Published standard A published, traceable figure: a standards body, a federal regulation or a manufacturer specification states it.
| Jack | Dynamic lift rating | Static holding rating | Built-in level | Power source | Price |
|---|---|---|---|---|---|
| Kohree Electric Trailer Jack, 4,000 lb, A-frame | 4,000 lb | 6,000 lb | No | Trailer battery | $99.10 |
| Kohree Electric Trailer Jack, 7,500 lb, with 7-way plug and built-in level | 7,500 lb | Not published separately | Yes | 7-way plug or trailer battery | $189.99 |
The dynamic rating is what governs whether the jack can actually raise your loaded tongue, and it is the figure to compare your measured tongue weight against, not the larger static number.
What should you confirm on your own trailer before ordering?
Both Kohree jacks share a 22 inch lift range, but whether that actually fits your trailer depends on measurements only your own rig can supply.
From your own vehicle This number exists only on your own vehicle and trailer. Read it off the door jamb sticker, the trailer certification label or the owner manual.
| Measurement | Why it matters |
|---|---|
| A-frame tube outer diameter | The jack mounting bracket has to clamp your exact tube size, and this varies between trailer manufacturers. |
| Existing jack footprint, side-wind or top-wind | A top-wind electric jack usually bolts into the same footprint as the crank jack it is replacing, which simplifies the swap considerably. |
| Retracted and extended height needed | The 22 inch lift range on both Kohree jacks has to actually span your coupler height at rest and your ground clearance requirement while towing. |
These figures live on your own trailer, not on any product listing, and confirming them before ordering avoids the most common return reason in this category: a bracket that does not clamp the existing A-frame tube.
Why bother with electric over a hand crank at all?
The honest answer is speed and it is also safety. A hand crank on a loaded tongue is genuinely hard work, and the Kohree 4,000 lb jack listing itself compares its own lift time against slower competitors for exactly this reason. More importantly, hitching alone with a hand crank means choosing between watching the coupler settle onto the ball and turning the handle, since both hands are occupied by the crank. An electric jack with a button frees a hand to guide the coupler visually while it drops, which matters most on the exact moment a hitch failure would actually happen.
How we chose
We did not test this hardware in person and we never claim to. Picks are researched from manufacturer specification sheets, published towing standards, and the recurring themes in verified owner reviews. Every pick is matched to a real gross trailer weight rating, a real tongue or pin weight rating, a real receiver size or a real load index rather than to a price bracket, and it is placed in the tier where its published capability actually belongs. We rejected the unbranded flood that dominates the search results in several of these categories, because a weight distribution hitch, a brake controller, a trailer tire and a set of safety chains are all parts whose failure puts a loose trailer on a public road. Where a figure is towing convention rather than a published standard we label it that way, and where a manufacturer does not publish a figure we leave it out instead of estimating it.
Frequently asked questions
What is the difference between dynamic and static lift capacity on a tongue jack?
Dynamic capacity is what the jack can actually raise and lower while it is moving, and static capacity is the larger figure for what it can hold once stopped and simply bearing weight. The dynamic rating is what determines whether a jack can lift your loaded tongue at all, so compare your measured tongue weight against that figure rather than the bigger static one.
Do I need the 7,500 lb jack or is 4,000 lb enough?
It depends on your measured tongue weight, not your trailer's total weight. A conventional trailer typically carries 10 to 15 percent of its loaded weight on the tongue, so a lighter trailer with a tongue weight comfortably under 600 lb fits the 4,000 lb jack. A heavier trailer, or one where you want real headroom for future upgrades, points at the 7,500 lb jack instead.
Can an electric tongue jack run off the trailer battery alone?
Yes, both Kohree jacks can draw from the trailer's own battery, and the 7,500 lb model adds the option of a 7-way plug that pulls power from the tow vehicle instead, which avoids draining the trailer battery during hitching. Either power source works; the 7-way option is simply an added convenience on the larger jack.
What happens if the electric jack fails mid-trip?
Both Kohree jacks include a manual crank handle for exactly this situation, so a dead battery or blown fuse does not strand you without a way to raise or lower the tongue. Chock the trailer wheels before using the manual override, the same as you would with the electric function, since the trailer is not stable with the tongue partway up regardless of which method raises it.
Does a caster wheel replace an electric tongue jack?
No. A caster jack wheel like the CURT 28276 lets you roll an unhitched trailer sideways by hand into a tight spot, but it does not raise or lower the tongue height at all. It is a maneuvering accessory used alongside an electric or manual jack, not a substitute for one.
Will an electric jack fit my existing crank jack mount?
Often yes if it is a top-wind style jack replacing another top-wind mount on the same A-frame tube diameter, but confirm both the tube diameter and the mounting style before ordering. A mismatched bracket is the single most common return reason in this category, and it is easy to check with a tape measure before the part arrives.
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Researched, not professional advice. This page is compiled from published standards, manufacturer towing guides and product specifications, and owner-review consensus, not hands-on testing. Figures described as a rule of thumb are towing convention rather than published standards, and they are labelled that way wherever they appear. Nothing here overrides your own ratings. Work your payload sum before your tow rating, because payload is the limit that actually binds on most half ton trucks and nearly every SUV. Load a conventional trailer to 10 to 15 percent tongue weight and a fifth wheel to 15 to 25 percent pin weight, and never lighter: a tail heavy trailer is what starts sway. Weigh the rig loaded rather than trusting a brochure dry weight. A weight distribution hitch and a set of air bags both restore ride height and control, and neither one raises a single rating. Trailer brakes are required by state law above a threshold that varies by state, and a breakaway battery that has quietly gone flat is the normal condition of most trailers on the road.