I built a ebike using a dev kit awhile ago, only problem is i bit off more then i could chew and along with using a dev kit i built a frame, front suspension and everything. Only problem is i am not a perfectionist so the frame/suspension did not quite work out perfect. Fine for me but not something i could sell with out any feelings of guilt cause it gets wobbly going around corners if you hit a bump. So i am selling of pieces of it after i have recently burnt out my motor and wanting funds to build some simpler, better stuff.
So i am selling the one part of the bike that worked perfectly and that is the Nuvinci Dev kit/wheel assembly, i dont think you can get these kits anymore but Fallbrooke still have support for them as i recently bought a new controller for my hub.
The kit comes with a adapter to run a normal freewheel+second chain line(will supply with 90T 219 chain sprocket mounted, standard kart sprocket so you can swap it out for anything easily). 13g spokes from Holmes laced to a 17" moto rim with a 17" 2-3/4" Sava(common race tire for 125cc light weight race bikes) wet race tire cause it works best when cold.
All for $550 shipped in Australia
If you want a matching front wheel i have a 17" cheap Chinese wheel and the same tire for $200 shipped