marcum@sun.uucp (Alan Marcum) (11/01/85)
I've received a number of requests for the gearing on the Trek I took
to Vermont for my tour with VBT. So, I thought I'd post it for all
you gearing freaks.
The equipment consists of an Ultra 6 freewheel (13-15-19-24-30-34),
Huret Duopar rear derailleur, Specialized triple crankset (26-42-47)
with bottom bracket, Shimano Deore fron derailleur, and a Specialized
rear hub (36-spoke, cross-three). The gearing chart ends up as follows,
with a 24% full-step difference:
34 30 24 19 15 13
26 20.6 23.4 29.2 --- --- ---
42 33.4 37.8 47.2 59.7 75.6 ---
47 --- 42.3 52.9 66.8 84.6 97.6
The ---s in the table represent gear combinations I don't use (because
of the extreme chainline angle, or lack of derailleur capacity -- though
note that the 26-19 WILL, actually, work). This ends up being a
"practical half-step plus granny," in that the useable gear combinations
produce a half-step pattern.
Tailwinds and downhills!
--
Alan M. Marcum Sun Microsystems, Technical Consulting
...!{dual,ihnp4}!sun!nescorna!marcum Mountain View, California