Re: A new shift concept for the engineers....
I was messing around today so I sandwiched a 50t and 44t sprocket together and it fit fine on the bike, my chain was not long enough for the 50t, but the concept looked like a solid idea. I think Jim's idea of only making it a 4t jump between sprockets is about right, 6t looked doable but I think 4t would work better. My current spring tensioner should do the job, just have to adjust for more play when I get my longer chain. Even if I can't get the derailer idea to work, I can stop my bike and kick the chain up or down a sprocket, then roll backwards about 3feet to set the chain on the new sprocket.