The main Problem is with this Hub,
Because the Hub should fit to 36 spokes rims, usually it for 26' 24' 21' inch rims,
to fit 12 inch rim, it litte problem, the Hub is about 9' inch size,
so i buy simple curved sprokes rim,
i broke the curved sprokes, and i design some part to fit between the Hub and Rim, By CNC Cuting.