I bought a used Allycat trail-a-bike. Unfortunately, the hitch seems to be made for a seatpost of some un-godly small size less than 1".
It uses a top and bottom collar that holds the hitch mechanism in place on the seatpost. I installed 1 collar and used an old inner tube to keep it snug. But this doesn't last long before it comes loose.
Is there any place that sells just the seatpost hitch? I'm will to try another vendor to see if I can salvage this trailer. I've seen Traileron but I don't know if that's sufficient to hold a trail-a-bike.