Douze Cycles V2 - Chain Tensioner
thingiverse
I had to buy a replacement part for the chain tensioner on my V2 Douze Cycles and was charged EUR 40 for basically a piece of plastic (to be printed for EUR 0.50) and a 3mm thick round rubber band (i.e. the section when cut is 3mm in diameter, it fits perfectly inside the groove of the wheel) to fit inside the groove. I am not sure how easy it is to find the rubber, but at least one can have the wheel for free. If you do not find rubber, I would print the second version which has the rubber replaced by a 3D printed version of it.
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