Back Pedaler screws hold two gear boxes together from underneath.
Custom flange, 18 spoke holes, 9 decorative, and one for axle. Grooves in flange to accept gear and locking screw.
Back Pedaler gear box. A collection of brass spacers is provided to get the 2 gears to mesh exactly right... not too tight and not too loose. 6 bearings are needed to hold the 4 gears and 3 axles.
Back Pedaler axle with flange and gears assembled. Notice the holes on top of boxes, they are used to screw the top gears in place and also to inject grease into the assembly.
Back pedaler spoked wheel (4 cross) with gears.
Whole Back Pedaler as shipped (Un-Cycle). Powder coated frame.
Close up of Back Pedaler.
How to take apart Back Pedaler. (In purple, one dot gear box for .008 and .010 spacer, two dot gear box has .015 spacer. This fine tuning spaces the gears apart, just right.)
I have "rough" design specs. I am not sure how to present yet. Let me know if interested.
I can now go backwards. :) It took me a while. I found one foot idle harder than double wheel, as a giraffe idles slower. Also got a circus idle down (almost a still stand with pedals at same level)... for a double wheel that would be harder, as it tends to slip.
I am now learning how to juggle confidently. I also found going backwards between pylons a little too hard yet.
Its still so much fun... and still a little scary too. By far, my favorite unicycle.
Down side, well I hear sometimes ... "Look, he is riding a unicycle."
Special thanks to Tom Miller for making it possible.