Sturmey Archer RS-RF3 3/32” sprocket compatibility?
09-16-23, 05:42 PM
#1
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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
Sturmey Arche also has 3/32" sprockects parts for a similar internal gear hub (e.g. the rx-rk5, a 5 speeds hub)
If not, is there any third party company that makes 3/32" sprocket for the RS-RF3?
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)
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
If not, is there any third party company that makes 3/32" sprocket for the RS-RF3?
09-17-23, 06:19 AM
#2
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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.
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.
09-17-23, 06:22 AM
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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.
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.
09-17-23, 07:58 AM
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These Shimano sprockets will work, and your LBS is more likely to inventory them.
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/
Three-speed October:
https://societyofthreespeeds.wordpress.com/3spdoct/
