#1
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hub gear question
Anyone had any experience of using individual cassette sprockets on a s/a 3
speed hub gear. It looks to me that with a little bit of judicious grinding these would work and enable a wide range of 3/32" sprockets to be selected from. |
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#2
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hub gear question
I've done this with sprockets for a Nexus hub as suggested on Sheldon's
pages. I removed three of the tabs and filed radii on the three remaining ones. I think SA sprockets *may* be the same, so if you can get them to fit, go for it! I find them to rattle a bit more than the proper ones though. Cheers, Nick |
#3
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hub gear question
There's a lot of interchangeability between Sturmey, Sachs, and Shimano 3-speed hub cogs, and a wide variety of sizes are still available. If that's not enough, though: From Sheldon Brown's site: http://www.sheldonbrown.com/sturmey-archer.html .... It is also possible to modify Shimano cassette sprockets with a Dremel grinder if you need something bigger. This is not particularly difficult to do. You got to be very careful if you don't know where you're going, because you might not get there. - Yogi Berra |
#4
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hub gear question
On Mon, 13 Nov 2006 10:58:41 -0500, Snortley
wrote: There's a lot of interchangeability between Sturmey, Sachs, and Shimano 3-speed hub cogs, and a wide variety of sizes are still available. If that's not enough, though: From Sheldon Brown's site: http://www.sheldonbrown.com/sturmey-archer.html ... It is also possible to modify Shimano cassette sprockets with a Dremel grinder if you need something bigger. This is not particularly difficult to do. Or smaller. There's a 13-tooth cog on a Nexus-7 on one of the daily drivers 'round here, ground from a cassette outer cog. |
#5
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hub gear question
Done it!!
Took about 10mins with a Dremel but the sprocket is quite loose on the hub, when the circlip is in place, as its a lot thinner than the genuine article. So a spacer of some sort will be necessary. From looking it looks like its going to have to be thinner than a cassette spacer.................................any ideas? |
#6
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hub gear question
On 13 Nov 2006 07:33:08 -0800, "Nick"
wrote: I've done this with sprockets for a Nexus hub as suggested on Sheldon's pages. I removed three of the tabs and filed radii on the three remaining ones. I think SA sprockets *may* be the same, so if you can get them to fit, go for it! I find them to rattle a bit more than the proper ones though. Sturmey, SRAM/Sachs, Shimano, and cheapo crappy coaster brake hubs all use the same three-spline sprockets. Those things are *widely* available, just for the coaster hubs even if not for any of the gearhub hubs. Mostly they're 1/8 rather than 3/32 thick, but those chains are not that much heavier and are a lot more maintenancefree. Lastly, sprockets intended for a cassette have shallow teeth and usually ramps & stuff specifically to allow it to derail easily. This would be a bad thing on a singlespeed drivetrain. Jasper |
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