jimlews wrote: 7 Jul 2023, 8:45am
Q. What could be better than a Sturmey Archer three speed ?
A. Two Sturmey Archer three speeds in the same hub.
I am of course, talking about the S5-2 five speed.
I acquired one ready installed in the rear end of a Dawes Galaxy that I bought from this forum ( thank you Bob).
It is quite delightful to use; those triggers are still the best gear changer that SA have ever produced and are in some ways better than modern derailleur indexing. The way they just snick into gear is wonderfully satisfying.
As others have, I've geared low - a 22T rear sprocket driven by a 36T chainwheel furnishes a nice range of ratios -
with a couple of 'climbing gears' for modest inclines and two reasonably 'high' gears for just tapping along on the
level. For descents, I'm quite happy to let gravity do the work. What's the hurry !
An update on the above:
The gear range is quite adequate and the gear shifting via the two
trigger shifters is precise. Was this the Worlds first index gearing ?
gear inches are:
66.3
56.0
44.2...Direct Drive
34.8
29.5
While I'll never win any races on it, I was never into that, anyway.
it's just a very pleasant experience.
Theoretically, a nice gear range for saddle bag touring.
Top is good for slight downhills or on the level with a following wind.
The 30" bottom gets me up moderate inclines. Freewheeling "above"
the 66.3" top gear felt a little frustrating until I reset my mind to sedate
rather than"aris in the air and go for it" mode. But I find that I'm normally
in the middle three gears most of the time, with the other two as optional.
It requires quite a different mindset calming and meditative. Mindful and
mechanically empathic.
.
But I know that it is a fragile mechanism, so I have to treat it gently.
No "honking", no stamping on the pedals; just a smooth power input
especially as these '70s alloy shells have a reputation for ALIEN like
emergence of the low gear pawls through the hub shell. And I can feel
them abrading the shell interior in first gear. With this set-up I'm content
to walk up the steeper hills. Yesterday evening as a finale to a 50+ mile ride
I ventured onto the rough-stuff; an unadopted ridge track with a broken
surface, potholes and rocks. But it was fine, especially with the sunset
flushing those furtherest, loftiest crags. Hammerhead it wasn't.
It will be interesting to see how long it lasts with considerate use.
I might have to fit a cycle computer to the bike, to record progress.
That would be a first for me.