A trailer jack raises and lowers the coupler so you can hitch up, level a trailer or park it on uneven ground. We have not used these products ourselves, so this guide is about how to choose, not a report from the driveway. Read it to learn which details deserve your attention.
Different trailers call for different jacks. A small utility trailer, a camper and a boat trailer each place unique demands on the mount, the travel and the foot. Work through the factors below, check the maker documents, and compare listings one detail at a time. Write down your current coupler height and the tongue weight from your trailer documents before you open any listing.
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What to Look For
| Factor | Why it matters | What to check |
|---|---|---|
| Lift capacity | The jack should cover the tongue weight of your loaded trailer with room to spare. | Compare the maker figure with your trailer documents. |
| Lift type | Manual crank, drop leg and powered jacks suit different habits. | Think about how often you hitch and how much effort you want. |
| Mounting style | Bolt-on, weld-on and swivel mounts attach to the frame differently. | Confirm the mount matches your tongue shape and hole spacing. |
| Travel | Travel is how far the leg extends and retracts. | Measure coupler height at rest and fully raised. |
| Foot design | A wide plate or wheel changes how the jack handles soft ground. | Decide between a flat plate, a caster wheel or a swing foot. |
| Finish and seals | Weather and road spray can corrode exposed threads. | Look for a coating and a boot or cover over the screw. |
Setup and Care Tips
- Follow the install sheet for bolt size, hole position and tightening values from the maker.
- Place a board under the foot when you park on gravel, dirt or hot asphalt.
- Add a small amount of grease to the screw and gears as the maker suggests.
- Wipe away grit after beach or muddy trips so threads stay clean.
- Retract and pin the leg before you pull away, then look it over from time to time.
Mistakes to Avoid
- Choosing by lift figure alone without checking how the jack mounts.
- Forgetting that a loaded trailer weighs more on the tongue than an empty one.
- Ignoring travel, which leaves the coupler too low or too high.
- Using a jack as a stand for work under the trailer.
- Leaving bare threads exposed to salt and dirt for a whole season.
FAQ
Is a powered jack worth considering?
Powered units reduce cranking effort and can help if you hitch often or have limited strength. They need a power source and wiring, so weigh convenience against the extra parts that may need attention.
How do I measure travel?
Measure from the ground to the underside of the coupler when the trailer sits level, then compare that number with the retracted and extended heights the maker publishes for each jack. Keep the maker figure for tongue weight beside the jack figure so you can compare them without guessing.
The Short Version
Choose a jack whose capacity, mount and travel fit your trailer, then compare foot design and finish. Read the maker details carefully and match them to the way you actually park and hitch. Keep the numbers you gathered on one page and compare each listing against them.
