Trailer Jack Types: A-Frame, Swivel, Drop-Leg and Square Tube, and How to Size One

A trailer jack holds the tongue of an unhitched trailer off the ground and raises or lowers the coupler onto the hitch ball. It looks like a simple part, but trailer jacks come in several types that mount in different ways, carry two different ratings, and reach different heights. A jack that is too short will not reach the ground, one that is too tall will drag, and one that is rated too low for the tongue can fail under load.

This guide explains the main trailer jack types Southwest Wheel carries: A-frame jacks, swivel jacks (weld-on bracket and pipe mount), marine jacks, drop-leg jacks, square tube jacks, electric jacks and stabilizer jacks. Then it walks through how to size one step by step: tongue weight, support capacity vs lift capacity, mounting style, travel and bracket height, handle style, and foot. Specifications come from the RAM Trailer Products catalogs and install sheets unless another source is named.

Key takeaways

• Most jacks carry two ratings. RAM lists a support capacity and a lower lift capacity for most of its jacks. A RAM 5,000 lb. A-frame jack, for example, is rated 5,000 lb. support and 3,000 lb. lift. RAM marine jacks carry a single support/lift rating.
• The trailer tongue decides the type. An A-frame coupler with a jack hole takes an A-frame jack. A straight tongue takes a swivel jack (weld-on bracket or pipe mount), a bolt-on marine jack, or a direct weld square tube jack on heavier trailers.
• Height is three numbers. Bracket height (how far the jack reaches below its mount when fully retracted), travel (how far it cranks out) and any drop leg or foot have to fit the distance from the mount to the ground.
• Accessories have their own ratings. RAM rates its 6 in. casters at 1,200 lb. and its A-frame feet at 2,000 lb., even though it lists them for any RAM A-frame jack, including the 5,000 lb. models.
• Mount it with the trailer hooked up. RAM's A-frame and marine instructions both say it is best to hook the trailer to the tow vehicle when mounting a jack, so the trailer is secure.
• Marine jacks and salt water. RAM's marine swivel jack instructions recommend greasing at least once a year and recommend not using the jack in salt water, because corrosion can affect its operation.

Terms used in this guide

• Support capacity: The load RAM rates the jack to hold up.
• Lift capacity: The load RAM rates the jack to raise with the handle. On most RAM jacks it is lower than the support capacity.
• Travel: How far the inner tube cranks out from fully retracted to fully extended.
• Bracket height: RAM measures it from the bottom of the jack to the bolt flange (A-frame jacks) or to the center of the swivel mount (swivel and marine jacks), with the jack fully retracted.
• Jack height when fully retracted: The overall length of the jack with the inner tube all the way in.
• Top wind / side wind: Where the handle is. A top wind jack cranks from the top of the tube; a side wind jack cranks from the side through a gear box.
• Swivel jack: A jack on a pivot mount. Pulling the pull pin lets the jack swing to a new position, where the pin locks it again.
• Drop leg: A lower leg and foot that can be pinned at different positions, so the foot reaches the ground before you start cranking.
• Direct weld: A jack whose outer tube is welded straight to the trailer frame or tongue.
• Sand foot: RAM's term for the flat foot plate welded to the bottom of many of its jacks.
• Grease zerk: A grease fitting that lets you grease the jack without taking it apart.
• Tongue weight (hitch weight): The part of the loaded trailer's weight that rests on the hitch.

Trailer jack types at a glance

Table note: capacity ranges are the ranges printed in the RAM catalogs (TruRyde for the electric jack). The jacks shown on our site today run from 1,000 lb. marine jacks to 12,000 lb. square tube jacks, plus two-jack combos.

A-frame trailer jacks

An A-frame jack is the straight tube jack that drops through the round jack hole in an A-frame coupler, the coupler where the two tongue rails meet in a V. RAM describes its A-frame jacks simply as "for use with trailers with A-frame couplers." The jack has a flange partway up the tube that bolts to the coupler.

• Capacity: RAM's 2,000 lb. A-frame jacks are rated 3,000 lb. support / 2,000 lb. lift. Its 5,000 lb. A-frame jacks are rated 5,000 lb. support / 3,000 lb. lift.
• Tube: RAM A-frame jacks use a 2-1/4 in. outer tube.
• Handle: Top wind and side wind versions. RAM's side wind A-frame jacks with an exterior gear box include a grease zerk.
• Finish: Exterior grade black on the outer and inner tubes, with a zinc handle arm. A clear zinc version of the 2,000 lb. top wind jack is also offered.
• Foot or wheel: The bottom of the inner tube takes a foot, a caster wheel or an adjustable drop leg. RAM's feet and casters attach with a bolt and nyloc nut or a mounting clip assembly.

The bottom support plate. RAM's A-frame install sheet says: "If a lower support plate is not already present, install one in bottom of trailer frame. Lower support plate provides greater stability/side load support for jack." RAM's plate is a raw steel plate welded to the underside of the A-frame coupler, with a 2.29 in. hole the jack's outer tube passes through. Southwest Wheel carries the TruRyde Bottom Support Plate for A-Frame Trailer Jacks, which TRP cross-references to the RAM plate.

Shop 2K-5K A-Frame Trailer Jacks, including zinc A-frame jacks, 5K A-frame jacks and 5K side wind A-frame jacks.

Table note: dimensions as printed in the RAM A-Frame Jack and Accessories Catalog, September 2026. Some product pages show slightly different bracket figures; check the product page or call before you order for a tight fit.

Swivel trailer jacks: weld-on bracket and pipe mount

A swivel jack mounts to the side of a straight tongue on a pivot. With the pull pin out, the jack can swing to a new position; with the pin back in, it is locked there. That lets the jack stand straight down to hold the tongue, then swing into another position once the trailer is on the hitch. RAM sells two kinds of swivel mount, and the mount is the first thing to match.

Weld-on bracket swivel jacks

RAM's weld-on bracket jacks come with a raw weld-on bracket and a "deep seated snap ring for side load support." The bracket is welded to the tongue, and the jack swivels on it with a large 1/2 in. pull pin. RAM rates its 2,000 lb. weld-on bracket jacks at 3,000 lb. support / 2,000 lb. lift, with a 2-1/4 in. outer tube, a grease zerk and a welded-on 3-3/4 in. x 7-1/2 in. zinc sand foot. They come in top wind and side wind, with 10 in. or 15 in. travel.

The snap ring (also called a retaining ring) and the weld-on bracket plate are sold separately if you need to replace one. See 2K-5K Retaining Rings and Support Plates.

Pipe mount (tube mount) swivel jacks

RAM's pipe mount jacks include a raw round weld-on mating pipe: 2 in. on the 2,000 lb. and 5,000 lb. jacks, and a heavy duty 3 in. pipe on the 8,000 lb. jacks. The pipe is welded to the tongue, and the jack fits onto it and is held by a pin and lanyard assembly attached to the jack. The pin size changes with the jack: RAM lists a 9/16 in. pin on its 2,000 lb. pipe mount jacks and the 5,000 lb. top wind, and a 5/8 in. pin on the 5,000 lb. side wind and the 8,000 lb. jacks. Replacement male and female pipe mounts are sold by pin size, so note which pin your jack uses.

RAM rates its pipe mount jacks at 3,000 lb. support / 2,000 lb. lift (2,000 lb. class), 5,000 lb. support / 3,000 lb. lift (5,000 lb. class) and 8,000 lb. support / 7,000 lb. lift (8,000 lb. class). All have a grease zerk.

Shop 2K-5K Weld-On Swivel Trailer Jacks, 2K-5K Tubular Swivel Trailer Jacks and 2K-5K Tube and Mount Kits.

Table note: dimensions as printed in the RAM Weld On Bracket and Weld On Pipemount Jack Catalog, September 2026.

Marine trailer jacks

RAM's marine jacks are "ideal for use with boat, sport craft, snowmobile and other recreational trailers." The common style is a side wind swivel jack with a caster wheel that bolts around the tongue, so no welding is needed.

• Mounting: RAM's 1,000, 1,200 and 1,500 lb. marine jacks include bolt-on hardware to mount on a 2 in. x 2 in. up to a 3 in. x 5 in. trailer frame. The 1,000 lb. jack uses a single bolt-through design with a large washer; the 1,200 and 1,500 lb. jacks use a four bolt pin-through design with a large diamond shaped washer, both for side load support. A weld-on 1,000 lb. version is also made.
• Rating: RAM gives each marine jack one support/lift capacity, for example "1,200lb Support/Lift Capacity."
• Wheel: 6 in. poly caster on the 1,000 and 1,200 lb. jacks, 8 in. poly caster on the 1,500 lb. jack, or dual 6 in. casters on the 1,500 lb. dual wheel jack.
• Swivel: A large 1/2 in. pull pin activates the swivel.
• Finish: Clear zinc.
• Heavier marine jacks: RAM's 2,500 lb. marine jack is a square tube, side wind, bolt-on jack with a 3-3/4 in. x 7-1/2 in. sand foot, a drop leg that adds 13-3/4 in. of adjustability, 15 in. of travel and a grease zerk.

Salt water. RAM's installation sheet for its marine swivel bolt-on jacks says: "It is recommended not to use in salt water due to the possible acceleration of corrosion which will effect the operation of the jack." If your trailer goes into salt water, ask us before you order.

Table note: dimensions as printed in the RAM Marine Jack Catalog, September 2026. Southwest Wheel also carries a 1,000 lb. RAM side wind bolt-on marine jack with a 6 in. caster; RAM's catalog lists 10 in. of travel, 24 in. retracted height and 13-1/2 in. bracket height for its 1,000 lb. bolt-on marine jack.

Shop Marine Trailer Jacks. Replacement handles and mounting bracket kits are under Handles and Mounting Brackets.

Drop-leg trailer jacks

A drop leg is a feature more than a separate mount: it shows up on square tube jacks, on heavier marine jacks and as an add-on for A-frame jacks. The leg and foot pin at different heights, so you can drop the foot most of the way to the ground first and use the crank only for the last few inches and the lift. RAM lists how much each drop leg adds:

• 5,000 lb. and 8,000 lb. square tube jacks: drop leg adds 13.75 in. of adjustability.
• 10,000 lb. square tube jacks: drop leg adds 13.5 in.
• 12,000, 15,000, 20,000 and 25,000 lb. square tube jacks: drop leg adds 12 in.
• 2,500 lb. and 5,000 lb. marine jacks: drop leg adds 13-3/4 in.
• A-frame add-on: RAM's zinc adjustable drop leg for its 2,000 lb. top wind A-frame jacks is 9.5 in. tall with five position adjustability, a 5-1/4 in. diameter foot with weep holes for water drainage, and a 2,000 lb. capacity.

Spring return or not. RAM's 12,000 lb. square tube jacks come in spring return and non-spring return drop leg versions. Its 20,000 lb. dual pin jack uses a "large dual pin foot release for easy activation of the spring return drop leg."

Pin direction. Heavy drop-leg jacks are ordered with the drop leg pull pin facing front or facing right. Pick the side you can reach on your trailer. RAM publishes a teardown procedure for changing the pull pin direction on certain heavy duty jacks, but it means taking the jack apart, so it is easier to order the direction you need.

Shop drop leg feet and casters under 2K-5K Casters and Feet.

Square tube trailer jacks (direct weld)

Square tube jacks are welded straight to the trailer frame. RAM describes its 5,000 lb. and 8,000 lb. square tube jacks as "ideal for use with ag, industrial, commercial, recreational and many other types of trailers," and its 12,000 lb. jacks for "commercial, construction, larger utility and many other types of trailers where heavy duty lifting is needed." Most come with a drop leg and a welded-on sand foot.

Table note: from the RAM 5K and 8K, 10K, and 12K to 25K square tube jack catalogs. RAM's 5,000 lb. side wind square tube catalog page does not print a support/lift rating, so it is left out of this table. The square tube jacks on our site today are the 5,000 lb. (CURT), 8,000 lb. and 12,000 lb. classes; call 1-800-866-3336 before you order if you need more than 12,000 lb. on one jack.

The 8,000 lb. class

RAM's 8,000 lb. Standard Series top wind drop leg jack (TJD-7000) is rated 8,000 lb. support / 7,000 lb. lift, with a 2-1/2 in. square outer tube, 15 in. of travel, a drop leg that adds 13.75 in., a 6 in. x 8 in. zinc sand foot, a grease zerk and 25.25 in. jack height when fully retracted. The side wind version (TJD-7000S) has the same ratings with a 25.5 in. retracted height. See 8K Direct Weld-On Trailer Jacks.

The 12,000 lb. class

RAM's 12,000 lb. side wind square tube jacks are rated 12,000 lb. support / 10,000 lb. lift, with a 4 in. square outer tube, 12.5 in. of travel, a drop leg that adds 12 in., an 8 in. x 8 in. foot, grease zerks and 28 in. jack height when fully retracted. They are ordered by:

• Pin direction: pin to front or pin to right.
• Drop leg: spring return or non-spring return.
• Handle: with the handle, handle clip and mounting hardware, or without the handle assembly. RAM's "NH" versions come without the handle assembly, so order a handle such as the Handle for 12,000 lbs. Trailer Jack with them.

Two speed. RAM's 12,000 lb. two speed side wind jack has the same ratings, travel and retracted height, and RAM notes its "two speed gear box is within the width of the outer tube to eliminate interference issues at the front of the trailer." It comes pin to front, with a spring return drop leg, and with the handle and mounting hardware.

Heavier setups. Southwest Wheel also carries 2-speed jack combos with a handle and cross shaft, listed at 24,000 lb. RAM's own heavy landing gear system pairs a 25,000 lb. two speed jack with a single speed companion jack "when used in tandem."

Shop 12K Heavy Duty Square Trailer Jacks and 12K 2-Speed Heavy Duty Square Trailer Jacks.

Electric trailer jacks

An electric jack replaces the hand crank with a 12V motor. TRP lists the TruRyde 3,500 lbs. Electric Trailer Jack at 3,500 lb. lift capacity with 19.5 in. of travel, 12V DC power with a manual override crank, drop through bolt-on or weld-on mounting, a 48 in. prewire with a 7-pin RV type trailer connector, hardened steel gears and an LED night light. Southwest Wheel also carries a Lippert 3,500 lb. powered tongue jack and its auxiliary cord. For a middle ground, some jacks can be run with a drill: RAM's 10,000 lb. side wind jack has a 3/4 in. hex head "for electric drill operation at slow speed," and we carry a Lippert drill-operated 2,000 lb. tongue jack. See Electric Trailer Jacks.

Stabilizer jacks

Stabilizer jacks steady a parked trailer at the frame rather than carrying the tongue. RAM describes its telescopic stabilizer jacks as being for "corner stabilizing" and its flip down stabilizer jack as "ideal for all types of RV, utility and cargo trailers." The flip down jack is rated 1,000 lb. support / 650 lb. lift, adjusts from 11-3/4 in. to 17-3/4 in. of vertical height, and comes with a handle included with every two jacks. That 650 lb. lift rating is well below the lift rating of any tongue jack in this guide. Southwest Wheel sells them in sets of two and four; see 1K Stabilizer Jacks.

How to size a trailer jack, step by step

Step 1: Know the tongue weight

Size the jack for the heaviest loaded tongue weight it will carry, not the empty trailer. If you do not know your tongue weight, Dexter's applications guide says hitch weight for a conventional bumper type hitch should be 10% to 14% of the trailer's gross weight, and 15% to 20% for fifth wheel and gooseneck hitches. For example, a 7,000 lb. loaded bumper pull trailer at 10% to 14% puts about 700 to 980 lb. on the hitch. Our guide to choosing trailer axle capacity explains hitch weight in more detail.

Step 2: Compare both ratings, support and lift

The jack has to hold the tongue up while parked (support capacity) and raise it off the ball (lift capacity). On most RAM jacks, lift capacity is the lower number, so check it against your tongue weight. RAM's marine instructions put it plainly: "Never attempt to lift or support loads in excess of the rated strength of this trailer jack."

Table note: ratings from the RAM catalogs listed under References. Other brands may rate their jacks differently; read the rating on the product you order.

Step 3: Match the mount to the tongue

• A-frame coupler with a jack hole: an A-frame jack, plus a bottom support plate if the frame does not already have one.
• Straight tongue, light trailer, no welding: a bolt-on marine jack, which RAM fits to 2 in. x 2 in. through 3 in. x 5 in. frames.
• Straight tongue, welding is fine: a weld-on bracket swivel jack or a pipe mount swivel jack. If you are replacing a swivel jack, match the mount (bracket or pipe) and, on pipe mounts, the pin size.
• Heavy trailers and goosenecks: a direct weld square tube jack, sized by support and lift capacity.

Step 4: Check height, travel and bracket height

Measure with the trailer coupled and level. Measure from the ground up to the point where the jack will mount: the bolt flange for an A-frame jack, or the center of the swivel mount for a swivel or marine jack. That is the number to compare with the catalog figures.

• Bracket height is how far the jack reaches below its mount when fully retracted. The gap between that and the ground is what the jack has to close before it starts lifting. A foot, caster or drop leg takes up part of that gap.
• Travel has to cover the rest of the gap plus enough lift to raise the coupler off the ball. A drop leg adds reach without cranking.
• The part above the mount (jack height when fully retracted minus bracket height) has to clear anything above the tongue.

For example, RAM's 2,000 lb. top wind weld-on bracket jack comes with 10 in. travel and an 11 in. bracket height, or 15 in. travel and a 16 in. bracket height. The longer jack reaches further but also hangs lower when retracted.

Step 5: Pick top wind or side wind, and check handle clearance

• Top wind: the handle turns on top of the jack. Several RAM top wind jacks use a claw knob and a solid bar handle "that can be folded away when not in use."
• Side wind: the handle turns on the side through a gear box. RAM's A-frame install sheet says: "For side wind jacks make sure jack handle is facing toward tow vehicle." Make sure the handle can turn a full circle without hitting the tongue, a toolbox or the tow vehicle.
• Two speed: RAM offers two speed gear boxes on its heavy jacks, and keeps the 12,000 lb. two speed gear box within the width of the outer tube to avoid interference at the front of the trailer.

Step 6: Choose the foot

• Welded sand foot: standard on RAM's swivel, pipe mount and square tube jacks, from 3-3/4 in. x 7-1/2 in. up to 9 in. x 9 in. on the heaviest jacks.
• Caster wheel: RAM's 6 in. poly wheel (JC-101) and steel wheel (JC-102) casters are listed for any RAM A-frame jack and are rated 1,200 lb.
• Foot plates: RAM's A-frame feet are rated 2,000 lb.: a bolt-on sand foot (2-1/4 in. x 4-1/2 in. with two weep holes), a short foot (1.7 in. tall, 4-1/2 in. x 6-1/4 in.) and a tall foot (8.5 in. tall, 4-1/2 in. x 6-1/4 in.).
• Adjustable drop leg: RAM's A-frame drop leg is rated 2,000 lb. and is listed for its 2,000 lb. top wind A-frame jacks.

The caster or foot is part of the load path, so check its rating against your tongue weight, not just the jack's. Several A-frame jacks are sold as combos with a caster or foot already included, such as the RAM 5,000 lbs. A-Frame Trailer Jack with 6 in. Poly Caster Wheel and Zinc Foot.

Step 7: Pick the finish for where the trailer lives

RAM offers exterior grade black finishes, clear zinc on many inner tubes and feet, and clear zinc on most of its marine jacks and some A-frame jacks. Remember RAM's marine instruction about salt water (see Marine trailer jacks above).

Installing a trailer jack: what the RAM instructions say

Bolt-on A-frame jacks

From RAM's Manual A Frame Jack Installation Instructions:

1. "When mounting trailer jack it is best to hook up to tow vehicle to make sure trailer is secure."
2. "Remove the old jack from the coupler and save the washers and bolts."
3. "Insert new jack into the jack hole aligning the bolt holes. For side wind jacks make sure jack handle is facing toward tow vehicle."
4. "Secure the jack with three grade 5, 3/8"-16 UNC bolts. Bolts should be tightened to 15-20 ft lbs."
5. "If a lower support plate is not already present, install one in bottom of trailer frame. Lower support plate provides greater stability/side load support for jack."

Bolt-on marine swivel jacks

From RAM's instructions for its 1,000, 1,200 and 1,500 lb. marine swivel bolt-on jacks:

• "When mounting trailer jack it is best to hook up to tow vehicle to make sure trailer is secure."
• "Make sure bolts and nylock nuts are securely tightened. (Regularly check to make sure bolts and nylock nuts are securely tight.)"
• "This jack is pre-greased for easy operation. This jack however includes a grease port for easy lubrication as needed. Recommended to grease minimum once per year."
• "To activate the swivel function on this jack pull the pull pin out and swivel jack into desired position. Only swivel jack when it is hooked up to a tow vehicle. Make sure swivel pull pin is properly engaged and locked after swiveling into desired position."
• "The swivel is very strong and exceeds the stated capacity of the jack. However abuse, corrosion or damage may cause the swivel to break. Regularly inspect the swivel for damage and discontinue use if the swivel is damaged."
• "Never attempt to lift or support loads in excess of the rated strength of this trailer jack. Sudden failure of the jack may result in serious personal or property injury."

Weld-on jacks

RAM's Weld On Jacks Instruction Sheet opens with a warning: "When welding a trailer jack always make sure the trailer is properly supported." It also says the instructions "are guidelines. It is the trailer manufacturers responsibility for proper welding based on their specific application." The weld guidance by jack type:

Keeping a trailer jack working

• Grease it. Many RAM jacks have one or more grease zerks "for easy greasing of jack." RAM's marine swivel jack instructions recommend greasing at least once a year.
• Check the bolts. On bolt-on jacks, RAM says to regularly check that the bolts and nylock nuts are tight.
• Inspect the swivel. On swivel jacks, RAM says to regularly inspect the swivel and stop using the jack if it is damaged.
• Replace worn parts. Handles, pins, snap rings, mounts, feet, casters and gear kits are sold separately. See Jack Replacement Parts and Handles.

Trailer jack ordering checklist

1. Loaded tongue weight (or loaded trailer weight and hitch type).
2. Lift capacity and support capacity, both above that tongue weight.
3. Mount: A-frame coupler jack hole, weld-on bracket, pipe mount (with pin size), bolt-on marine, or direct weld.
4. Ground to mount height, measured coupled and level.
5. Bracket height, travel and drop leg that fit that height.
6. Top wind or side wind, with room for the handle to turn.
7. Foot, caster or drop leg, and its rating.
8. Finish, and whether the trailer sees salt water.
9. On heavy jacks: pin direction, spring return or not, single or two speed, and whether the handle is included.

Frequently asked questions

What is the difference between support capacity and lift capacity?

Support capacity is the load RAM rates the jack to hold up; lift capacity is the load it is rated to raise with the handle. On most RAM jacks the lift capacity is lower. A RAM 5,000 lb. A-frame jack, for example, is rated 5,000 lb. support and 3,000 lb. lift.

What size trailer jack do I need?

Start with the loaded tongue weight. Dexter's applications guide puts hitch weight at 10% to 14% of gross trailer weight for bumper hitches and 15% to 20% for fifth wheel and gooseneck hitches. Choose a jack whose lift and support capacities are both above that number, then check that its bracket height and travel fit your tongue height.

Should I get a top wind or side wind jack?

Either can do the job. Pick the one whose handle you can turn freely on your trailer. On A-frame jacks, RAM says to install side wind jacks with the handle facing toward the tow vehicle.

What is a drop-leg jack?

A jack with a lower leg and foot that pin at different heights, so the foot reaches the ground before you crank. RAM's 5,000 and 8,000 lb. square tube drop legs add 13.75 in. of adjustability, and its 12,000 lb. drop legs add 12 in.

Can I use a marine jack on a saltwater boat trailer?

RAM's installation sheet for its marine swivel bolt-on jacks says: "It is recommended not to use in salt water due to the possible acceleration of corrosion which will effect the operation of the jack." Call us before you order if your trailer goes into salt water.

Do I need a bottom support plate for an A-frame jack?

RAM's A-frame install sheet says to install a lower support plate if one is not already present, because it "provides greater stability/side load support for jack."

Can I put a caster wheel on a 5,000 lb. A-frame jack?

RAM's 6 in. casters fit any RAM A-frame jack, but RAM rates them at 1,200 lb. Check your tongue weight against the caster rating as well as the jack rating.

Does a 12,000 lb. drop-leg jack come with a handle?

It depends on the version. RAM offers its 12,000 lb. jacks with the handle, handle clip and mounting hardware, or without the handle assembly (the "NH" versions). Order a 12,000 lb. jack handle separately for the versions without one.

How often should I grease a trailer jack?

RAM's marine swivel jack instructions recommend greasing at least once a year. Many RAM jacks have grease zerks so you can grease them without taking them apart.

References

• RAM Trailer Products. A-Frame Jack and Accessories Catalog, September 2026.
• RAM Trailer Products. 5K and 8K Square Tube Jack Catalog, September 2026.
• RAM Trailer Products. 10K Square Tube Trailer Jacks product sheet.
• RAM Trailer Products. 12K, 15K, 20K and 25K Square Tube Jack Catalog, September 2026.
• RAM Trailer Products. Marine Jack Catalog, September 2026.
• RAM Trailer Products. Weld On Bracket and Weld On Pipemount Jack Catalog, September 2026.
• RAM Trailer Products. Stabilizer and Scissor Jack Catalog, September 2026.
• RAM Trailer Products. Manual A Frame Jack Installation Instructions.
• RAM Trailer Products. Marine Swivel Bolt-On Jacks installation instructions (1,000, 1,200 and 1,500 lb. capacity).
• RAM Trailer Products. Weld On Jacks Instruction Sheet, September 2026.
• RAM Trailer Products. Pacific Rim TJD12000/DLPN-20000/TJD-25000 Teardown and Pull Pin Direction Change Procedure.
• TRP International, LLC. TruRyde Trailer Frame Jacks and Couplers brochure (2024): Electric Jack and Trailer Jack Accessories and Parts.
• Dexter Axle. Applications guide (LIT-008-00): Things To Consider When Designing Your Trailer.
• Southwest Wheel product listings for Lippert, CURT and TruRyde jacks (capacity and travel as listed).

Related guides

• Choosing Trailer Axle Capacity: Hitch Weight, GAWR, Wheels and Tires

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