HD Air Trailer Tongue Mount & Demco Coupler for 2-5/16" Ball - 21,000 lbs
Rated for your tow
21,000 lbs GTW · 2,100 lbs TW· 21,000 lbs GTW · 2,100 lbs TW
$1,377.58
$1,510.30 save $132.72
or as low as $115/mo with flexible financing — 4, 6, or 12 months. Options at checkout.
Air ride technology
Built-in air ride system for a smoother towing experience with built in height adjustment plus weight adjustable.
Quickly mounts to trailer tongue
Choose from vertical channel mount (fits 3-1/2″ wide vertical channel with 2″ center on center bolt pattern & secure with 5/8" pins or bolts) or square plate 4 bolt mount (4-1/2" square bolt pattern)
Smoother safer towing. Improves your
ride, reduces wear & tear on pickup & trailer
20,000 lb rated towing capacity
with a cast 2 5/16" heavy duty demco coupler
Stop destroying your trailer and cargo.
Every bump, pothole, and expansion joint sends a violent jolt through your trailer frame, damaging cargo and wearing out your truck. Shocker Air Ride Hitches absorb that punishment at the coupling, before it reaches your trailer.
Heavy trailer behind a stiff-sprung truck, and every frost heave and hard stop jerks straight through the hookup. That shock beats up your cargo, your trailer frame, and your truck a little more with each mile. The Shocker Heavy Duty 25K Air Tongue Mount fixes it right at the source. It bolts straight to your trailer A-frame and puts the air ride on the trailer instead of the truck, so any tow vehicle that hooks up gets a smoother tow. Rated up to 21,000 lbs GTW with 2,100 lbs of tongue weight, so there's real breathing room when the load rides heavy up front. Sold as a bare base frame or with a coupler already installed, and the built-in 3-inch front channel takes a vertical-channel coupler or a pintle ring.
Key Highlights
- Up to 21,000 lbs GTW and 2,100 lbs of tongue weight, the heaviest tongue mount we build
- Built-in 20K air ride soaks up road shock right where the trailer meets the ball
- Vertical Channel Mount bolts straight onto heavy A-frame trailers
- Order it bare, or already paired with a coupler
- 3-inch front channel takes ball couplers or pintle rings
- Works right alongside weight-distribution hitch systems
- The air ride stays with the trailer, so every truck that hooks up gets the benefit
- In stock in Canada and ships direct, no border wait
What's Included
- Shocker HD 25K Air Trailer Tongue Mount base frame (Vertical Channel Mount)
- Coupler (pre-installed on bundled SKUs only)
- Air bag (pre-installed)
- Schrader air valve with cap
- Greasable 1-inch heat-treated 1045 steel center pivot bolt
- Installation instructions
Not Included
- —Coupler or pintle ring (on no-coupler SKUs, sold separately)
- —Mounting bolts (5/8-inch bolts 4-1/2 inches long for vertical channel; 5/8-inch by 4-inch typical for square plate)
- —Air compressor or pressure gauge (available separately)
- —Weld-on vertical tongue adapter (available separately as SH-410-Spot or SH-410-C)
- —Weight-distribution hitch system (compatible but sold separately)
Installation
Watch the official install walkthrough for this hitch — the exact steps and tools, straight from the manufacturer.
How It Works
The Air Bag Does the Work
A 20K-rated air bag sits between the coupler and your trailer A-frame and eats the road shock before it ever reaches your frame, your cargo, or the truck up front. The jolt gets absorbed instead of passed straight down the line.
Tune It to the Load
Add air when the trailer runs heavy, let some out when it's light or empty. A few seconds with a pump dials the ride in for whatever you're hauling that day, so it never rides too stiff or too soft.
Simple Rocker Arm Pivot
The coupler swings down and back on a single rocker arm, with no slides, rollers, or parallel linkages to seize up or wear out. Fewer moving parts means less to maintain and a longer working life.
Nothing Hanging Low
The air ride sits up above the trailer tongue instead of dropping below it, so you keep full ground clearance for steep approaches, off-road equipment trailers, and tilt-deck haulers.
Built For Heavy Trailers
This is the heaviest tongue-mount tier we make, sized for serious commercial and recreational hauling:
- End dump and heavy equipment trailers
- Race car haulers and stacker trailers
- Skid steer and tilt-deck equipment trailers
- HD flatbeds and lowboys, within rating
- Big enclosed cargo and tool trailers
- Any A-frame trailer up to 21,000 lbs GTW with up to 2,100 lbs tongue weight
Two Ways It Mounts
Pick the version that matches how your trailer A-frame is built:
Vertical Channel Mount (SH-HD4000 series)
Fits a 3-1/2-inch wide vertical channel with a 2-inch center-on-center bolt pattern. You lock it in with 5/8-inch pins or bolts, 4-1/2 inches long recommended. This is the usual setup on fabricated trailer A-frames.
Square Plate Mount, 4-Bolt (SH-HD4500 series)
A 4-1/2-inch square bolt pattern that fastens straight to a flat plate on the trailer tongue. Four bolts and you're done. You'll see this one on a lot of factory-built dump and equipment trailers.
Bring Your Own Coupler, or Buy It Bundled
The HD 25K comes as a bare base frame or with a coupler already installed. The 3-inch front channel takes any vertical-channel-mount ball coupler or pintle ring rated up to 25,000 lbs. If you'd rather have it matched for you, the recommended bundles are the Demco EZ-Latch (DEM-14040-81) at 21K, the Wallace Forge auto-locking coupler at 20K or 25K, or the Shocker SH-P20000-B pintle ring at 20K. One thing to keep in mind: your total tow rating is only as high as the lowest-rated part in the chain, so match your coupler to your trailer GTW.
Why Put the Air Ride on the Trailer?
Put the air ride on the trailer instead of the truck and every tow vehicle that hooks up gets the smoother tow automatically, with nothing to install truck-side. That matters most for fleet trailers pulled by different drivers, rental trailers, equipment trailers passed between operators, and any commercial setup where the trailer is the one thing that stays constant. The HD 25K is the heaviest tongue mount we make, built for end-dump operators, race haulers, equipment fleets, and anyone whose trailer matters more than which truck happens to be pulling it. Backed by the Shocker Hitch 60-day satisfaction guarantee.
$1,377.58
Still researching?
Skip the product wall — these are the four guides every buyer actually opens before they decide.
Installation Guide
Step-by-step videos for every Shocker family. What's in the box, what tools you need, and how long it takes.
Watch the installAir Pressure Setup
How to dial in air pressure by trailer weight so the ride is right the first time and the hitch lasts longer.
See psi by loadTowing Capacity Guide
Match GTW, tongue weight, and receiver size to your truck class so you don't over- or under-buy.
Read the guideConfigure Your Hitch
60-second fit quiz — answer a few questions about your truck and trailer, get a tailored recommendation.
Start the quiz
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