At 5/23/2006 12:45 PM -0700, Eugene Powell wrote:
>Till we recover the Kish (the stolen bike of the previous message),
>Nikki wants to ride her almost new-late '70's Raleigh Sprite 3-spd
>to work. However, she'd like a lower gear (or 2) so.................
>
>Does the Sachs 7-spd internal have a wider range, or just more gears
>than the Sturmey AW? What about the other 7-spd internals?
Wider range, 303%
But two cable Sturmey 5 speeds are way cooler. And the 225% range is
plenty for most riding if you put on a large rear cog.
>Were there chainring options available for the Raleigh Heron cottered cranks?
Most came with 6-1/2" arms and 46t but I've seen a few with
44t. IIRC Earler, longer arms had 48s. I've a set with 40t but
5-1/2" arms. Sounds like they were thinking "Gain ratio" way back then.
>I know I'd have to change out the whole arm, but did they make
>different ring sizes?
>Any other thoughts?
Harris Cyclery carries 24t SRAM rear cogs, and Shimano makes a much cheaper 22t.
On Sunday, after the finish of this years http://3speedtour.com I sold 7 of the Shimano 22s to people who wished they'd had them for the Bay City and Maiden Rock hills. (Also sold 3 cotter pin presses to people who wished they'd had them to firmly seat their cotters before the hills.)
Mark Stonich;
Minneapolis Minnesota
http://mnhpva.org
http://bikesmithdesign.com