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Sturmey Archer RS-RF3 3/32 sprocket compatibility?

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Sturmey Archer RS-RF3 3/32 sprocket compatibility?

Old 09-16-23, 05:42 PM
  #1  
DiTBho
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Sturmey Archer RS-RF3 3/32 sprocket compatibility?

hi
I wonder if I can pair the Sturmey Archer's RS-RF3 (3 speeds) internal gear-hub with a 3/32 sproket.

Its part-list document only lists these 1/8" sprockets parts
  • HSL827 Sprocket 17T, 1/8" Deep Dished (Chrome)
  • HSL924 Sprocket 18T, 1/8" Deep Dished (Chrome)
  • HSL965 Sprocket 19T, 1/8" Deep Dished (Chrome)
and included with the RS-RF3 kit there is a 1/8" Dished 17T Sprocket.

Sturmey Arche also has 3/32" sprockects parts for a similar internal gear hub (e.g. the rx-rk5, a 5 speeds hub)
  • HSL201 Sprocket 19T, 3/32 Dished
  • HSL202 Sprocket 20T, 3/32 Dished
They look similar, but I can't understand if they can be used with the rs-rf3.

If not, is there any third party company that makes 3/32" sprocket for the RS-RF3?
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Old 09-17-23, 06:19 AM
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Yeah, lotsa choice here. Sturmey-Archer, Shimano, SRAM (Fitchel&Sachs), a lot of SS coaster brake hubs - in a rare bit of multi-brand uniformity, the 35mm 'three tab' sprockets all interchange.



Fun fact: Sturmey-Archer adopted the 35mm three-tab sprocket in 1952. They fit Sturmey's 2-, 3-, 4-, most 5- and 7-speed hubs produced in the last 70 years, plus Shimano 3-, 4-, 5-, 7-, 8- and 11-speed hubs produced in the last 30+ years, Sachs/SRAM 3-, 5- and 7-speed hubs manufactured since the mid-1950s and others.


Oh, right, yeah, no, you can't use the 50mm RX-RF5 sprockets on your RX-RF3 hub.

Last edited by tcs; 09-17-23 at 08:25 PM.
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Old 09-17-23, 06:22 AM
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Originally Posted by DiTBho
hi
...the Sturmey Archer's RS-RF3 (3 speeds) internal gear-hub...
Great hub, BTW. IIRC, this is



a SRAM sprocket I have on my RS-RK3 because it's the only 19T I had. Yeah, it's a 3/32.
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Old 09-17-23, 07:40 AM
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Here are just a few of the sprockets you can use:



Sturmey offers/has offered these in chrome, black oxide and, hmm, some other kind of finish I can't remember the name of, all with different part numbers. Plus there are those Shimano, SRAM and other sprockets that work, too.
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Old 09-17-23, 07:58 AM
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These Shimano sprockets will work, and your LBS is more likely to inventory them.

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Old 09-18-23, 07:00 AM
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Thank you guys!
I am trying to pair a Sturmey-Archer 3sp gear hub with Campagnolo 8sp crank and chain.
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Old 09-18-23, 08:29 AM
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Cool. In my picture in post no. 3, that's an 8-speed chain. Works!

Three-speed October:
https://societyofthreespeeds.wordpress.com/3spdoct/
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