BTW to anyone towing a trailer with a child in please refer to the operators manual for your trailer model. They usually give you a maximum recommended speed for riding at while towing the trailer. With my Burley D-lite that is 15mph. With another make I think it works out at 18mph. All that is a lot less than the 30mph someone on here claimed to be riding at. It may be safe at speed but personally I do not want to test it with my toddler, your choice of course (not the choice of the trailer occupant over the speed traveled). I have done 24.6mph (as I discovered after checking Strava at the end of the ride) but I got a stern telling off at the time and slowed down. The D-lite was very stable at that speed but at what speed does that stability go?
At what speed does the stability go? It doesnt!
I did 8,500 miles with my daughter in the trailer and we showed it no mercy, the two previous owners got more use out of it each than I did and we all agree the thing knows no limits.
Let the manufacturers stick on a 15mph limit to cover themselves against people doing something stupid at a speed greater than that.
As for not the choice of the trailer occupant, they loved it!
So we have three families here who have succeeded in pushing this trailer as far as they wanted through the toddler years of their children with never a moment's scare from the trailer. If that isnt good enough an indicator, what happens if you do go unstable and come off? The rider gets hurt and the child laughs at them as they ride relatively safely over the top in a trailer. I never felt that happy about a baby seat on the bike.
The only reason I can not make claims of 50 mph is because the aerodynamics would never allow it.
My trailer days are probably the happiest days of my life and my daughter loved them too. She did her first AAA Audax in it at three or four years of age, plenty of good descents on that too. I am totally relaxed about riding with the trailer as it was just so reliable and steadfast. Non stop hills around here and we would come down them at thirty miles an hour on a regular basis, going up was often a tenth of the speed.
Between us we have probably thirty thousand miles of experience of that trailer, often in very hilly terrain. I consider it well tested in real life and it passes with flying colours.
Somebody once described to me watching it go airborne behind me when traversing a speed bump (It may even have been Eileithyia from this forum).