you can also *just* barely stack two standard sturmey cogs on one sturmey hub - bulge sides facing each other, and a thin spacer (or bit of tough cord wrrapped around the driver) between the two. ive toured thousands of miles on mine set up like this, with 16t/23t cogs. i cant speak to the derailleur bit personally, cause i usually use a chain tensioner and switch the chain by hand, 16t for the flats and 23t for the climbs. friends who have used a sturmey with the cyclo 3 speed block and a benelux coil spring rear mech set up for 1/8" chain have said they work pretty well.
the 3 speed block i have is 16/19/23, which, with a 44t front chainwheel and a sturmey aw, gives gear inches of roughly 39/47/56, 52/63/75, and 69/84/100 in low, drive, and high gears (on the aw), respectively.
-joel
At 10:46 -0700 05.18.2005, sam lingo wrote:
>Cyclo conversions were common,some were two
>sprockets,on ebay sometime back a seller had a suntour
> cyclo clone for sale.That's a really long run for
>that chain pull design.I'm told with some tinkering
>the thin shamino rear sprockets can be made to fit on
>the new 3 pin sturmey archer hubs ,to give a two
>sprocket set up.
--
joel metz : magpie@blackbirdsf.org : http://www.blackbirdsf.org/
bike messengers worldwide : ifbma : http://www.messengers.org/
portland, oregon
==
i know what innocence looks like - and it wasn't there,
after she got that bicycle...