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03-02-21 | 07:55 PM

#16

Tourist in MSN

Senior Member

Joined: Aug 2010

Posts: 12,727

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From: Madison, WI

Bikes: 1961 Ideor, 1966 Perfekt 3 Speed AB Hub, 1994 Bridgestone MB-6, 2006 Airnimal Joey, 2009 Thorn Sherpa, 2013 Thorn Nomad MkII, 2015 VO Pass Hunter, 2017 Lynskey Backroad, 2017 Raleigh Gran Prix, 1980s Bianchi Mixte on a trainer. Others are now gone.

Quote:

Originally Posted by tcs

I've been thinking about a SRAM 11-50, 12-speed Eagle NX cassette fitted on a Sturmey-Archer CS-RK3 hub with a single chainring. 806% gear range.

I was not familiar with that hub, so I pasted it into google for a quick search. Looks like a Sram Dual Drive copy. I run a 11/32 eight speed cassette on my Dual Drive on my folding bike.

Overal, I think a triple crank is a better option, the only reason that I use a Dual Drive on my folder is that I can't fit a front derailleur on my folder. Thus the only way to get that wide a range is with the Dual Drive.

You can put a LOT of torque on the hub if you are on the 50T sprocket on that cassette. Not sure if the hub internal gears can take that much torque. You might want to look into that.

If I could have used a triple crank on my folder instead of the Dual Drive, I would have.

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