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I have a new flatbed trailer that uses a square tube tow bar instead of a round like my kid trailer has. Since I'm setup on the Burley system, I need to use a flex connector for the new trailer. I bought one of each with the trailer so I was prepared when it showed up. While looking at them either one will fit but the square tube connector has ridges which are just as round as the rest of the connector. Other than increasing the diameter of the connector, does the ridges really matter, or can I use either one on this trailer?

I'm sure I get no support from Burley since both trailers are not Burley and the packaging for the connectors clearly state not to use them on other trailers.

My kid trailer is a Pacific Voyager II and the new one I bought is a Aosom/Mwave/somebody "wonderer" flatbed.

Flex connector for round towbar: Flex connect for round towbar from Burley site

Flex connector for square towbar: Flex connect for square towbar from Burley site

Here is the side-by-side photo of the connectors I received: Flex connector compare

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Can you include pictures? I'm pretty sure I know what you're talking about, though. –  WTHarper May 22 at 17:14
    
@WTHarper I added the images from Burley's website. Is this what you are looking for or do you need more? If you need more I can take some photos of the exact ones I bought that could show other angles. –  BPugh May 22 at 18:11
    
Looks like I don't get a say which way to go on this one. I tried to use the square tube connector on my trailer but it is too big to fit. However the round tube connector fit just fine. I'm wondering if Burley uses different dimensions on their tube stock between round and square tubing. –  BPugh May 23 at 12:11
    
To followup on this. I'm still using the round connector, but I have less than 100 miles with it. I should have used the square and removed some material to let it fit. The round is in there a little loose, so I'll have to wrap it a once or twice with a inner tube. When I get more miles on it I'll post an answer. –  BPugh Dec 16 at 22:28

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