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Old 02-26-10, 07:29 AM
  #99  
rhm
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Join Date: Nov 2006
Location: NJ, NYC, LI
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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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Originally Posted by Sixty Fiver View Post
The SA AW is considered to be one of the most efficient drives of any type with a 97% efficiency... because of cross chaining and their susceptibility to contamination a derailer system can lose efficiency very quickly.

This only speaks to the drive's efficiency... a wider gearing range can make a rider more efficient even if the drive is not.
The new Sturmey Archer 5 speed wide range hub has the same ratios as the AW plus a super low and a super high. The gearing is:
1 ----0.62
2-----0.75
3-----1.00
4-----1.33
5-----1.60

I've ridden this about seven miles so far, so I'm not going to present myself as an exert yet! But my initial reaction is that the gears are too far apart. That is, I really miss the close ratios of my Sturmey Archer 8 speed hubs. I'm sure I'll get used to it, though. Photos to follow!
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