I would like some advice on feasibility/cost of wheel build. My 4 YO rides a bike with 16 inch wheels. It is single speed. I found a 14 inch wheel with a 2 speed automatic hub. There is a 16 inch 2 speed automatic with the same hub but out of stock with availability unknown. My kid is both spinning out on the flat and having difficulty on the climb, so I am tempted to try to give him more range with the 2 speed. The trouble is the 2 speed 16 inch wheel is simply unavailable.
So my scheme is to get the 14 inch 2 speed automatic wheel, swap the hub between the 14 and 16 inch, may require new spokes. The 2 speed hub is 32H with every other hole laced.
Question is if this is completely crazy and what might be the cost to have a shop do something like this?