The folks at Parker Brothers Choppers have put together a bike that’s the baddest Big Wheel since The Shining. It’s based on the Green Machine, the toy all the cool kids on our block got to ride when we were kindergartners with tricycles. Free Shipping. Buy Huffy Green Machine RT Inch 3-Wheel Tricycle at yagbu.net(61). Pedals and Spokes Make the Green Machine Look as Awesome as it Rides Adult Bike Wheel Size. 20 Inch. 24 Inch. 26 Inch. 27 Inch. 29 Inch. b. c. Avg. Customer.