I've been tinkering with my intermodal equipment and have had no luck finding appropriately sized pup trailers to put a pair of them on a 53' SHS/MTH flatcar. Adding another 5th wheel isn't a problem as American Models sells them and they are identical (I believe) to those found on SHS/MTH flats. But the maximum length trailer would be 26' or thereabouts and most pups are 28' long. So I went to my local Walmart to see what if anything was available to use on my flatcars instead of 2 pups.
I found 2 new offerings from M2 Machines...1950's vintage Coca Cola Tractor Trailers:
They are appropriately sized for S scale as M2 Machines are 1:64 scale. Both sell for $20.00 but that's not too bad a price as you get the tractor/trailer and an additional auto inside the trailer. American Models trailers are $14.95 each and you'll have to add shipping to that. The free auto from M2 is one of their entry level offerings w/o opening doors or hoods but being as how one of them is a 1957 Chevy (my favorite) I couldn't pass it up.
The first one is a 1957 Dodge COE (cab over engine) with a "Pick up 24" logo on the trailer. The free car is a 1966 Dodge Charger 383.
The second is a 1958 Chevrolet Spartan LCF with a "Refresh" logo on the trailer. The free car is a 1957 Chevrolet Bel Air.
The trailers are nicely made with opening rear doors. I'm not too sure about the "scale" size of the trailers as they scale out to 8'9" W X 42'6"L X 12'6" H. There were some 42' trailers back in the day so I'll call these "good enough".
When compared to my other TOFC trailers they fill a gap in scale sizes:
Top: MTH Railking (O scale) trailer 45'L X 13'3" H X 8'2" W
2nd M2 Coca Cola 42.5' L X 12.5' H X 8.75'W
3rd AM 40'L X 13.25' H X 8'W
4th SHS 35'L X 12.25'H X 8'W
The MTH reissued flatcars moved the 5th wheel closer to the end of the car to center the 45' long trailers better... SHS top, MTH bottom:
The Coca Cola trailer fits these newer cars nicely:
and it will also fit (barely) on an original SHS car:
So if you want to add something new to your trailer roster check out Walmart's toy aisle.
My train world frequently experiences time warps and you'll see a wide mix of different generations of rail equipment on the same train. Here's two examples of the new Coca Cola trailers on a train containing modern power, older TOFC cars, modern container well cars and of course my obligatory caboose at the end of every train...