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New Sturmey Archer 13/32" drive side nuts keep stripping

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New Sturmey Archer 13/32" drive side nuts keep stripping

Old 09-13-18, 07:29 PM
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pavement_nyc
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New Sturmey Archer 13/32" drive side nuts keep stripping

A lot of new bikes coming back to our shop because these are stripping out. After a couple flat fixes the threads are usually visibly worn. I don't think they are being overtightened at the factory, they actually come very loose. They just seem to be made with such a flimsy metal. Are there any better alternatives out there for 13/32" nuts?
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Old 09-13-18, 07:43 PM
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wschruba
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You need the special guide nut for the RH side, so...no. If you work at a shop, call SunRace NA and let them know about the problem. They will likely replace defective units.
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Old 09-16-18, 08:10 PM
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pavement_nyc
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Originally Posted by wschruba View Post
You need the special guide nut for the RH side, so...no. If you work at a shop, call SunRace NA and let them know about the problem. They will likely replace defective units.
What do you mean "special guide nut?" It is just a normal nut, the indicator chain does not touch it at all. There is a plastic pulley wheel that fits onto the nut to guide the indicator chain.
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Old 09-16-18, 10:28 PM
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wschruba
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Posting a picture of the bike(s) in question may be helpful. There are a handful of shift attachments for SA hubs.
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Old 09-17-18, 06:03 AM
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Dan Burkhart 
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Originally Posted by wschruba View Post
Posting a picture of the bike(s) in question may be helpful. There are a handful of shift attachments for SA hubs.
I think what he has is one of these.

Usually used in conjunction with a fulcrum lever.
I have encountered some soft nuts that seem to strip easily. Better the nut strip than the axle.I think this is by design.
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Old 09-17-18, 07:06 AM
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May just be a bad batch of nuts. I have three bikes with Sun Race Sturmey hubs and have not had a problem. Over 20,000 miles on the 5 speed hub on my commuting bike. I tend to crank the nuts down tight too.
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Old 09-17-18, 08:16 AM
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fietsbob
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Wheel pulling sideways, twisting, from pedalling force,
so you keep tightening it more , till nut is stripping,
rather than seeking out another solution for chain tension resistance?
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Old 09-18-18, 08:50 AM
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GamblerGORD53
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I had the same problem with those cheap non-dome nuts that come with the hub. Throw them out. That soft is not better. Pffft
However, the harder better SA dome nuts have had NO problem, there's 2 axel sizes. I have them on all my hubs. They should be greased every time. Use a good lockwasher so they grip without too much stress. With that plastic cap pulley part, maybe you can drill or file some of the dome nut off. I had troubles with that pulley and stopped using it.

Last edited by GamblerGORD53; 09-18-18 at 10:49 AM.
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