Burley Hitch Flex Connector

I selected the "round" option for my use.I have an old Avenir bike trailer which I had bought secondhand. It originally came with a crappy hitch that clamped directly to the chainstay and didn't work very well. Weighing my options, it looked like the Burley steel hitch was the only one to clear the eyelets on my Giant's unusual dropouts, so I tried this system out.I was able to bolt it directly to the trailer, and when paired with the steel hitch on my bike, had no trouble at all. It's a little finicky to get installed at first, due to the elastomer's flex, but getting the old one off was about the same.Note that Burley and Avenir/Raleigh probably don't endorse such a combination, but it worked great for me. The elastomer is about 21.5mm in diameter. This fit my trailer's drawbar just right, which has an inner diameter of 23mm.If you need a way to make your old Avenir (or other) trailer more workable, this is the ticket. It is a little on the expensive side, but you get what you pay for. The quality makes up for it. I'd definitely recommend.

Works as the original.

Much easier to take on and off than original. Very easy to install.

There is not much to say about this item. It just replaces the old Flex Conector that is worn from well over 1500 miles of riding and carrying some 100 pounds in the trailer. I will say that Burley should have made it a tad larger in diameter because there is a wee bit of play in it once installed. On the old one the play in between the connector and the square tube was to the point that it made the trailer sort of rock back and forth with each pedal. So it got uncomfortable pulling it. The rocking motion would sort of pull back on you then push you when pedaling. This new connector took care of all but just a bit of that and when pedaling in a constant motion you don't feel it at all. I may take it back off and put a thin shim inside of the square tow arm to make it Tight. The one for square tow arms (this one) has ribs around the part inserted into the tube whereas the one for round tow arms does not. Either way this is a much better setup than most out there with just a spring. It wobbles a whole lot less. Burley makes some of the nicest trailers on the market, but they are one of the most expensive.

Super easy install and allowed me to connect to my Aventon Aventure 2.

As the other reviewer mentioned, this is the full replacement kid for the square tow arm. It took me more time to find an 11mm wrench and allen wrench than it did to replace the entire hardware kit. All the hardware was top-knotch and what I'd expect from Burley.I installed the kit in a 2007 D'lite trailer that we purchased on Craig's list. I was told it had been used 3-4 times per year and the limited wear on the trailer overall leads me to believe the previous owners were telling the truth. The black "plug" (in the picture) came out of the tow arm without any resistance. It had a fair amount of wear, particularly around the four rings, and the pin hole for attaching the trailer to the bike was getting deformed. However, there were no no obvious cracks or major fatigue. The new plug took a good amount of force to get into the tube. Burley recommends replacing this hardware every 4-5 years (I think), so I understand now how it can be the weak link in the system. I kept the old parts as a emergency spares.

I have a Kidarooz Bike trailer, Costco sold them at one point and they are made similar to Croozer bike trailers they are a private company by Chariot.I looked at the Thule kit but they said theres wasn't compatible. I read other reviews and forums that said this Burley kit would work and it does!Installation was a breeze regardless in the picture below I had it installed upside down at first. I read instructions after the fact, and fixed it very easily I might add.The diameter of the lollipop (the black rubberry plastic piece is larger then the Thule version which worked out better because it removed the slop in the bar!In the image below it shows my old hinge mount style, to them side by side, then with the new burley connector inside, as well as the incorrectly installed upside down mounted to bike (I did fix it and flipped it so the strap is on top and clips in at bottom!)

It fits fine lasted a year before cracking, not as good as oem