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I've never been completely satisfied with the security of the tow hitch on my Croozer kid2. No matter how tight I do up the QR, it invariably rotates slightly, and when the towing arm is no longer perfectly aligned, the spring feeds back rather more "bob" than I'd like. It also doesmt fit the coweled dropout on my FS bike.
What I'd like to do is have a square bar to the same dimensions machined with a thread to accept the QR skewer so I can use it to replace the QR nut. First question is - any reason why I shouldn't do this? And secondly, what sort of business could do this for me?? (or better still are any STW's suitably tooled up to do this for a fee??)
Standard tow hitch looks like this
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you'll be concertating the forces over a much smaller area of the dropout if you do this.
I'd look at putting one of these either side of the plate you have already to lock it in place;
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I'd probably do it by brazing a QR nut onto a square rod - that way the QR nut's serrations will still be gripping properly.
It is the kind of thing I can do...
Good points - the section of the square bar isn't much smaller than the diameter of a QR nut, but perhaps I should add a suitably sized penny washer welded on with a knarled finish to the spec?