Happened upon this on the 'bay. Thought it was interesting - two close cogs on the low end and high end, and one in between. Enough to give mountaindave nightmares as it's not great for half-stepping, but I guess the benefit is you have nice close gearing when hammering on the flats (if anyone actually does that) or climbing? I guess I could've counted the teeth just to check but I didn't go that far in my curiousity, yet.

But I'm familiar with half-stepping, corncobs, and bailout/alpine setups, just not this configuration. Any experience would be interesting to hear!

https://www.ebay.com/itm/31430155985...mis&media=COPY