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Thoughts on a Sturmey Archer X-RF8 (on a Dahon Curve) 200km and 10 commutes later

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Thoughts on a Sturmey Archer X-RF8 (on a Dahon Curve) 200km and 10 commutes later

Old 03-31-18, 06:42 PM
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Originally Posted by fietsbob
spacer nuts on the left end can be thinner... to fit that 120 frame..
Would this work for a Shimano Nexus 8 speed hub?
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Old 04-01-18, 09:34 AM
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Given all the shift mech is on the right end, and left end is a solid axle , so it is certainly possible

to reduce the space outside the left cone . do need a locknut to not have the hub bearing adjustment not change

those 2 are the minimum..


I leave it up to you to measure what your hub minimal width is..





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Old 04-02-18, 03:19 PM
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Originally Posted by fietsbob
Given all the shift mech is on the right end, and left end is a solid axle , so it is certainly possible

to reduce the space outside the left cone . do need a locknut to not have the hub bearing adjustment not change

those 2 are the minimum..


I leave it up to you to measure what your hub minimal width is..





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Thank you for your time and consideration sir!
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Old 05-19-23, 02:56 AM
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I'll resurrect that old thread insteading of creating a new one.

I remember reading somewhere that bikes with small wheels should, if available, use a gear hub whose direct drive is the lowest like on this eight-speed SA rather than somewhere in the middle like on Shimano's.

Why is that? Is it because of the sizes of the chainring+cog available, or because it's especially important on those bikes to have the most efficient speed as the granny gear?

https://en.wikipedia.org/wiki/Comparison_of_hub_gears
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Old 05-19-23, 10:18 AM
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On a small wheel bike, you need a transmission that has a big multiplying factor from the pedaling cadence to the rear wheel rpm to have high enough gear inches because of the small diameter of this wheel.

With a derailleur this means either a very small smallest cog on the cassette (9 or 10t) or a very big chainring, bigger than the usual 50, 52, 53t used on road bikes, something like 60 or 65t depending of the actual wheel diameter..

With an IGH, internal ratios that overdrive the input cog rotation, i.e. where the wheel turns at a faster rpm than the cog, helps to avoid these small cog or big chainring.
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