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Old 09-23-11, 08:15 AM   #1
chagzuki
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New Sturmey Archer 5 speeds

What's this new 'N' range all about? Looks like the Brompton 6 speed type of thing. . . how many sprockets/cogs are meant to fit on the driver? Is that how the Shimano system always looks, i.e. with enough space to adjust sprocket/chainline position or is this clearly intended to run 2 sprockets?
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Old 09-23-11, 10:59 AM   #2
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Got links?


using the updated sheldon gears math engine that new 5 speed
is adding 1v and 5v to an aw3 ratio set, for 2nd and 4th
whereas the older 5 speeds tightened up the ratios.

Last edited by fietsbob; 09-23-11 at 11:03 AM.
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Old 09-23-11, 11:49 AM   #3
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On the SA website there's a bunch of new 5 speeds that have a 9 spline type sprocket fitting, which look similar to the brompton double-sprocket driver.
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Old 09-23-11, 03:13 PM   #4
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Originally Posted by chagzuki View Post
What's this new 'N' range all about?
The driver interfaces with a nine-spline Shimano cassette style cog, rather than the usual three tab cogs. I'd guess it's something that OEMs and today's bike shops have asked for.
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Old 09-23-11, 07:11 PM   #5
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Originally Posted by chagzuki View Post
What's this new 'N' range all about?
The only 5-speed hubs I can find on the SA website with a "N" designation are described as "now available with a 9 spline driver." In this one, for example, the image shows some sort of splined thingy on the right side where I assume the cog slips on, rather than threading on.
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Old 09-23-11, 10:45 PM   #6
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how many sprockets/cogs are meant to fit on the driver?
You have to measure .. BWR hub Made specifically for Brompton is for 2 3/32 cogs
planetary internal ratios are wider than the 4/3 and 3/4.. in the middle gears.

they could have used the same driver that they fit in the BWR hub , but that is Idle speculation.
see what the Hubstripping blog has to offer,

Write the Importer/distribuitor, or call a shop that stocks both..

Last edited by fietsbob; 09-24-11 at 07:14 PM.
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Old 09-25-11, 08:45 AM   #7
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In this one, for example, the image shows some sort of splined thingy on the right side where I assume the cog slips on, rather than threading on.
FWIW, Sturmey-Archer has not made IGHs that take threaded-on cogs for, hmm, around 60 years now. The standard pattern, and one that's shared with most Shimano and SRAM (Fichtel&Sachs) IGHs is the three-tab interface. The "thingy" is called a driver.
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Old 09-25-11, 11:31 AM   #8
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The new S3x a fixed gear hub with 3 speeds , threads the splines,
so you can use a screw on freewheel. [Or a spline cog for using it , as a fixed gear]

It is the lower 3/5ths of a 5 speed hub , 1:1 is the top gear

White industries Dos is a 2 cogs machined out of one piece freewheel ..
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