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...groan.
Yep had I known earlier then definitely woulda got the guy to make something different, especially the addition of the extra support bars.
Will report back tomorrow once all three ‘solutions’ are in place.
Certainly not cheap, a couple hundred quid and days and days of my life invested so far, but this was the cheapest route to finding out if cargo would work. I just need it to actually work so I can see, and then i can look to saving for a solid real cargo bike.
Not planning on carrying heavy loads, only light loads but I didn’t enjoy over 15kg in a single wheel trailer. Or else would have stuck with that.
pdlouche
frankenbike
Sounds like wheel flop
https://en.wikipedia.org/wiki/Bicycle_and_motorcycle_geometry#Wheel_flop
doesn't look like you've got many options for fixing the geometry aside from a new fork...
Also the single tube heading to the front of the bike (and the dropped top tube, also) is going to make it really torsionally flexy which will definitely contribute to your steering problems. When you compare to something like this with the three tubes you can see how yours is going to have a way less rigid front end, which is going to feed back into the steering... maybe you could have someone add some tubes around the sides to give a more bucket-like shape at the front? And a really short stem and 800mm-wide bars might give you more leverage to control the front wheel also.