I have a 24" Nimbus Ultimate Wheel, but wanted to have a 36" one. Modeled after the wrinkles of drag racing car tire, the spokes are laser cut from 6061 aluminum rectangular tubing. To overbuild, both hub (also laser cut 6061) and spokes have a wall thickness of 1/8". The rim is donated from a Coker wheel.
I originally tried to hire a welder to weld them together for me but after two welders failed me I learned welding aluminum and did it myself.
Two pairs of pedal threads have effective crank arm lengths of 150mm and 137mm respectively.