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Old 10-07-07, 01:21 PM
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tcs
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The Shimano Nexus/Alfine 8 has goofy ratio steps between the gears. To half step this hub, one would have to use three chainwheels.

Starting with - arbitarily - a 700x32 and 23T cog. The three chainwheels could then be a 42T, 45T and 47T.

Gear progression would be:
1st ratio, 42/23 = 26"
1st ratio, 47/23 = 29"
2nd ratio, 42/23 = 32"
2nd ratio, 45/23 = 34"
3rd ratio, 42/23 = 37"
3rd ratio, 45/23 = 39.5"
4th ratio, 42/23 = 42"
4th ratio, 45/23 = 45"
5th ratio, 42/23 = 49"
5th ratio, 47/23 = 55"
6th ratio, 42/23 = 60"
6th ratio, 45/23 = 64.5"
7th ratio, 42/23 = 70"
7th ratio, 45/23 = 75"
8th ratio, 42/23 = 79"
8th ratio, 45/23 = 85"

TCS
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