bit more info
diameter is 130mm flange width 45 mm
mines going in a folding shopper at 37 v on 20" wheels
good for 20 mph l hope ,
I have just fitted a 5 speed shimano block and alli 20x1.75 wheels , folding pedals and straight bars, ground the chainwheel to 3/32 and I am just spraying the battery rack
By my calculations 1x spokes 392 dia rim 130 dia hub and 45 mm apart
137 mm spokes
I was thinking of lacing them the same as the currie way with ALL the spokes going in and then they can be laced .
I might need to modify a pair of BMX forks to fit the frame to cope with all that power rather than the Polish standard fitment , The originals have been stretched to 100mm without a problem and 10mm lugs but they do seem a bit flimsy as I will need to make up a spacer rather than grind off some of the anti rotate bushes .
The forks are 20 years old and have survived so far