Micro Machines: Tiny crank and tiny wheel Megathread

Unicycles and Equipment
342

A spring loaded tensioner going the opposite way would solve the problem, for example if I had two opposing derailleurs both using the same cog

343

I was already making a copy of Red Menace (aka jackshaft uni) you need room for cogs and they have to line up well or the chain will fall (like what normally happens on 2 or 3 speed chainrings.) using a larger frame allows room for attachments, look at Red Menace and you’ll see it’s a V-frame with a dropout that’s still in line with the hub and crank.

1 Like
344

I’m in search of building a g20 for myself as well. It will be a fun experiment to see if it can be faster than my regular 20”

1 Like
345

If you have access to welding then a jackshaft or penguin is a good idea

1 Like
346

You could use a pair of derailleurs, one on each side of the drivetrain, and it would keep the chain tensioned, but you would still have a ton of free play in your pedals as the slack moved from one side of the drivetrain to the other.

1 Like
347

Maybe so but it would be cheaper than a Schlumpf and have more options for gearing, assuming it’s done properly

348

Yes, or you combined it. Schlumpf and than you have a couple of more options than only with the Schlumpf.

349

So I had a really silly idea but a fun thought experiment. I’ve tried 32c tires on my 700c unicycle before, and there are 16” 349mm rims that could be used on a unicycle build. They are the same size as bromtpons so you’re limited on tire size but it could be spun fast with the 50mm cranks as shown above.

https://www.lightbicycle.com/rf621-16-349mm-carbon-rim-for-brompton.html

350

So you’re thinking of a 32mm tyre on a 16“ wheel, did I get this right? Must be twitchy as hell.

351

Yes, it is a special kind of cursed or stupid but quite fun I imagine.

1 Like
352

@Wheelou

I took this personally (/s)

353

I should’ve added “for me”. That’s what happens when I stay awake too long and try to make shortcuts…