Originally Posted by im

The Trailer in a Bag (TiB) is no longer available but below is a link to get an idea.
Just look at old Trailer in a Bag information and video.
I believe the inventor for TiB passed and the patent is no longer active.
Basically made with 2 1/2 inch and 2 inch square structural steel so it is very strong.
Mine has the mandatory (my opinion) aluminum floor boards that makes ride-up loading and unloading easier.
Also mandatory in my opinion was the Condor chock.
You can see the TiB information but it would seem like the site is now promoting The Stinger Trailer as an alternative.
Link for Trailer in a Bag : http://motorcycletrailer.com/tib/
The Port-a-Chopper unit is very similar but has torsion suspension.
It has no floor boards available but it should not be difficult to make some.
Link for Port a Chopper: http://www.portachopper.com/
These units are basically made out of the same square steel tube that is used for a hitch.
I would say the walls of the tube are mostly 0.25 inch thick no seam structural steel.
The neat thing about the TiB is that it fits in the trunk of cars...about the size of a big suitcase and two back packs.