Originally Posted by
invisiblehand
Ahhhh ... thanks. I looked at the Flickr photos more carefully and saw that he did respond to another person.
That's pretty cool. Playing with a few combinations, it makes a big difference IMO to the available gearing options. With only three cogs on the rear, it would be pretty easy to frictino shift the whole thing. At least, that's my strong prior without actually trying it on a Brompton derailer.
It is impressive... I toyed with the idea to implement something like that on mine, then decided against it as 10-sp chains are actually a lot more expensive than 8-sp ones. So on that I decided not to pursue it. I have other gearing option ready to go when I need them for loaded touring. For commuting, 2-sp all the way.