Demco
21K Autoslide
21K lbs
Max Trailer Weight
5.3K lbs
Max Pin Weight
DIY or Pro?
Installation
Availability
Where to Buy
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
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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.