Rock Line Products Inc. (Airtow Trailers)

La Verne, CA 91750


About Rock Line Products Inc. (Airtow Trailers)


1480 Arrow Highway
La Verne, CA 91750
United States of America

More Info on Rock Line Products Inc. (Airtow Trailers)



In 1996, the present owners of Rock Line Products Inc. designed and patented a drop-deck trailer called the Triple L Trailer. "Triple L" standing for "Lower-Load-Lift". The company started as Premco Products Inc. which was setup to manufacture the trailer. Many thousands were produced and are still working hard for their owners to this day.

In 2002, the Triple L Trailer was sold to the JLG Company as a complimentary product for their scissor lifts and, at the same time, Premco changed its name to Rock Line Products.


Having been the original designers of the Triple L, drop-deck trailer, we became very aware of new markets and design changes that needed to be made. Many new industries were seeking us out and requesting new features. Based on the new markets and design requests, Rock Line Products developed the AIR-TOW Trailer line.

The electronic components of today’s equipment continue to get more complex and sensitive. As a result, the request for a smoother riding trailer became more and more frequent. We have answered these request by designing a unique air suspension not found on any other trailer. A few of the AIR-TOW basic design improvements are:

  • Full automatic, self contained, dual air suspension system
  • Five inch wider deck while maintaining the same overall width
  • Fifty percent thicker deck plate to prevent warpage from heavy loads
  • Lower ramp angle for easier hand dolly and pallet jack loading and ground level loading
  • All new axle design eliminating unnecessary tire wear
  • No tire exposure beyond the trailer frame (making it legal in ALL states)
  • Easy, accessible brake adjustment
  • Anti-theft, master lock switch
  • Improved automatic deck lock
  • Adjustable safety chain
  • High capacity, 8-lug – 16" wheels with 12 ply tires on all models
  • Increased number of “D” tie down rings to a total of 8
  • Plus many other accessories such as extended "E-track" rails


We have always been known for new product development that is highly engineered; quality built and serves a niche in the market place. New innovation and the entrepreneurial spirit is what we here at AIR-TOW pride ourselves on.


Rock Line Products Airtow Trailer models of drop deck trailers 57a38b91ce49e
Trailers, Towing & Specialty

Airtow Trailer drop-deck trailers

Aug. 3, 2016
The Rock Line Products Airtow Trailer models of drop-deck trailers are designed to address many loading, safety and cargo protection concerns. Built with a heavy duty but lightweight...
AirtowTrailers RS820 trailer 5717c5a1f2d92
Trailers, Towing & Specialty

RS8-20 trailer

April 19, 2016
Versatility for extremely tough environments
AirtowTrailers RS820 1 5704042dc6d02
Trailers, Towing & Specialty

Airtow Trailers announces release of 2,000-lb capacity drop-deck trailer

April 5, 2016
The latest model RS8-20 trailer has been added to the Airtow Trailers product line. Designed with a smaller footprint and a 2,000-lb capacity, this trailer is well suited for ...
AirtowTrailers MS1055 MiniSkidSteerTrailer LowRes 55e7227b9a315
Trailers, Towing & Specialty

Mini Skid-Steer Trailer, No. MS10-55

Aug. 24, 2015
The Airtow Trailers Mini Skid-Steer Trailer, No. MS10-55, allows ground-level loading. The non-tilting deck remains level as it hydraulically raises and lowers in less than 20...

Videos & Resources

Airtow 3D Series - Drop-Deck and Dump Video
Trailers, Towing & Specialty

Airtow 3D Series - Drop-Deck and Dump Demonstration Video

Jan. 19, 2015
The Airtow 3D Series - Drop-Deck and Dump trailer is a ground level loading equipment trailer, a utility trailer and a dump trailer all wrapped into one, hard-working vehicle....


Arnie Behr

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All content from Rock Line Products Inc. (Airtow Trailers)

Airtow 3DSeries DropDeckAndDump Photo LoRes 54bed71671948
Trailers, Towing & Specialty

3D Series - Drop-Deck and Dump

Jan. 19, 2015
The Airtow 3D Series - Drop-Deck and Dump is a ground-level loading equipment trailer, a utility trailer and a dump trailer combined into one vehicle. With a load capacity of ...
Airtow 3DSeries DropDeckAndDump Photo LoRes 54bd617aade67
Trailers, Towing & Specialty

Airtow introduces multi-purpose 3D Series - Drop-Deck and Dump trailer

Jan. 19, 2015
The multi-purpose trailer lowers flat to the ground for safer, easier and faster loading and unloading and is a dump trailer.
Airtow 10131168
Trailers, Towing & Specialty

Ground Level Loading Trailers

March 15, 2010
Rock Line Products' Air-Tows are ground-level loading, fully air-suspended trailers that feature an extra wide 75" deck with a extra thick steel diamond floor plate for heavy ...