Bike Forums - View Single Post - Changing Sturmey Archer AW Cogs

10-29-10, 07:29 AM

#30

rhm

multimodal commuter

Join Date: Nov 2006

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Bikes: 1940s Fothergill, 1959 Allegro Special, 1963? Claud Butler Olympic Sprint, Lambert 'Clubman', 1974 Fuji "the Ace", 1976 Holdsworth 650b conversion rando bike, 1983 Trek 720 tourer, 1984 Counterpoint Opus II, 1993 Basso Gap, 2010 Downtube 8h, and...

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Quote:

Originally Posted by Grand Bois

Quote:

Originally Posted by Zaphod Beeblebrox

You should see rhm's 3 speed, 2 cog set up. Apparently you can fit two of those dished cogs on there if you set it so one's dished to the inside and the other is dished outside. Then a rear derailleur to change between the 2 rear cogs. Picture like a 22 and a 18

I don't think you could have that large a difference. You'd probably have to shorten the chain to go from 22 to 18.

Correct. With an AW, two cogs with a three tooth difference is ideal. I'm running a 20 and 23, which is pretty nice.
With an FW or S5 you'd want the difference in the cogs to be two teeth.
In fact, I just got an S5 off ebay, complete with bell crank, and am sorely tempted to put that in the AW's shell... but I should ride the current setup a bit more before changing anything.

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