Re: [RBW] Quickbeam gearing for hills and weak knee?

[James Warren]

That was (and still is) mine. Joe, you have it mostly accurate. A couple corrections will follow shortly, but first and foremost, I did successfully run a 40-24, so that was nice. I wanted to have a two-mode singlespeed basically (one gear for flats and one for serious uphills), and I wanted the two modes to be more different than what Rivendell was offering in the stock QB. Also, I wanted to be able to shift while riding.  So the bike did actually have a working front derailleur attached to a shifter, and my gear changing did occur betwen the 40 and 24, and it did happen with a shifter without needing to get off the bike. The rear thing that looked like a derailleur was actually not a functioning derailleur. It was just a former derailleur now put into a service as a massive chain-slack-taker so that the difference from 40 to 24 chainrings would be possible during shifts. And Joe was right about the claw. Anyway, here's the description:

 

http://www.cyclofiend.com/Images/rbw/rr36_pg27.jpg

 

This always worked fine and could be a solution for saving one's knees. Over time, I changed that bike from a two-chainring to a three-chainring bike. Most recently, I've lost interest in the limited gear choice thing, and now the bike is 11-speed Alfine! I had the rear spread to 135. Pretty good way to go so far. But I want to set it up with drop bars, so I'm eagerly awaiting JTEK's bar-end shifter for 11-speed Alfine.

 

-Jim W.

 

-----Original Message-----
From: Joe Bernard

I've seen a QB with a rear derailer in a Reader. As I recall (it's around here somewhere) it kept the standard flip-flop hub, then added a cheap Shimano derailer with the "claw" attached so it would fit the tabless frame, and had a wide range double up front. The derailer's ability to take up slack made it possible to have a big gap up front without having to readjust the rear wheel after front shifts, or deal with a drooping chain. No front derailer, no shifters...still basically a two-speed riding experience, but with one flat gear and one super-low. With this arrangement you could run a 40-24.

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