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Rear wheel nut is "loose" on bike with Sachs Torpedo hub?

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Rear wheel nut is "loose" on bike with Sachs Torpedo hub?

Old 08-25-17, 12:12 PM
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SteelBallSachs
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Rear wheel nut is "loose" on bike with Sachs Torpedo hub?

I'm pretty new to servicing bikes and wanted to change the rear sprocket and chain on my bike. It's an older bike with Sachs Torpedo Triplex hub.

So I started by disconnecting the wire going to the rear wheel (for the gears) and proceeded to remove the nut, then I found that the nut on the other side (with the foot brake) was very tightly screwed and I couldn't remove it. Fine, I thought, the rear sprocket didn't look to be in very bad shape anyway so I thought I'd try to use the old sprocket with the new chain and see how it goes. I went on to put back the nut which I had unscrewed.

The thing I'm concerned about is that while the nut is screwed as far as it can go, it doesn't "stop", I can keep on twisting it and it doesn't come to an end. Is this normal? I'm thinking it might have been that way since it was rather easy to unscrew.

Last edited by SteelBallSachs; 08-30-17 at 08:17 AM.
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Old 08-25-17, 12:28 PM
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If I'm following you correctly, then no, that is not good. I assume we're talking about the axle nut; that is, the nut on the axle. It should press firmly against the bike frame (with maybe a washer between them) and stop. If it won't tighten, my guess is the nut threads are stripped, and the nut will need to be replaced. I don't know what the axle thread is, though.
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Old 08-26-17, 03:24 AM
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Try holding the nut on the other side, with a wrench, and then attempt to tighten the drive side nut. It is possible that the axle is turning. Just a guess.
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