Demco
21K Autoslide
21K lbs
Max Trailer Weight
5.3K lbs
Max Pin Weight
Our Assessment
Stupid Simple Score
DIY or Pro?
Installation
Availability
Where to Buy
Requires
OE Puck System
Expert Take
A 21K Autoslide puck-mount built for short-bed rigs that need clearance in sharp turns without a manual slide. It does its job at a reasonable price, though the sliding hardware makes it heavier to set and the ride is middle-of-the-road.
About This Product
The Reese Autoslide 21K combines 21,000 pounds of capacity with automatic sliding. Short bed truck owners get cab clearance without manual slider operation. The hitch slides back when turning forces call for it, returns forward when you straighten out.
This is the sweet spot for most short bed fifth wheel towers - enough capacity for large trailers, automatic operation for convenience. No stopping to manually slide the hitch, no forgetting and hearing your trailer hit the cab.
The automatic mechanism is mechanical - turning forces activate the slide. Nothing electronic to break. Reese has refined this system over years of production.
Installation takes longer than fixed hitches due to the sliding assembly. Many people have shops handle it, though experienced DIYers manage fine. Once in, just occasional lubrication.
For short bed trucks with factory puck prep. If you have a long bed, save the money and complexity - get a fixed hitch. Automatic sliding is specifically for short bed clearance.
Compatibility
Fits These Trucks
RAM
| Model | Years | Bed Length | Bed Prep | |
|---|---|---|---|---|
| 2500 | 2013 - Present | Short Bed | Puck System | All options → |
| 3500 | 2013 - Present | Short Bed | Puck System | All options → |
Compare Options
Related Products
B&W
25K Companion
Weight Rating
25,000 lbs
Head Type
fixed
Mount
OE Fifth Wheel
MSRP
$1,399
PullRite
24K SuperGlide
The 24K SuperGlide is the gold standard for short-bed trucks, automatically sliding the hitch back when you turn so the trailer clears the cab without you touching a thing. It drops into factory pucks and tows incredibly smooth; the auto-slide mechanism is the trade you make on a slightly fussier install.
Weight Rating
24,000 lbs
Head Type
auto sliding
Mount
OE Fifth Wheel
MSRP
$2,505
B&W
20K Companion Slider
A 20K sliding Companion aimed at short-bed owners who need extra turning clearance between cab and trailer. The slider adds a step at install and a manual move before sharp turns, but the head still tows cushioned and quiet.
Weight Rating
20,000 lbs
Head Type
sliding
Mount
OE Fifth Wheel
MSRP
$1,699
PullRite
25K OEX Super 5th
A 25K OEX Super 5th fixed head for puck-equipped trucks, delivering the full-strength build and minimal chucking PullRite is known for. Great capability and a tidy puck install, but it sits at the premium end of the price range.
Weight Rating
25,000 lbs
Head Type
fixed
Mount
OE Fifth Wheel
MSRP
$1,648
Got Questions?
Frequently Asked Questions
The 21K Autoslide is compatible with RAM trucks from 2013 to 2026. Use the fitment table above for the complete list of compatible year, model, and bed configurations.
The 21K Autoslide is rated for 21,000 lbs gross trailer weight (GTW) and 5,250 lbs vertical trailer weight (VTW — the pin weight your truck carries). Always verify your truck's tow rating before purchasing.
This hitch is considered DIY-friendly — most owners can install it with basic tools.
The 21K Autoslide is available from Demco directly. Use the "Where to Buy" buttons above for current pricing and availability.
This is the benchmark 25K puck-mount Companion that every other fifth wheel gets measured against. It drops into factory pucks, pops out with a lever when you want your bed back, and tows dead quiet thanks to the cushioned, fully-articulating head.