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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 12-11-05, 07:15 PM   #1
ersatz radio
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Loose cog--hub thread damage?

So I was doing skids in a wet parking lot today, and my cog was slipping on my hub. This is the second time this has happened. I get home and tighten the cog and lockring--hard. Rotafix for the cog, lockring tool for the ring. Before I did this, I removed them to have a look at the threads and make sure the cog was adequately greased. The hub threads looked normal, but there was a small ribbon of aluminum--maybe .5 mm wide and very thin--stuck to one of the threads of the cog. Is this something worth worrying about, or should I just not sweat it as long as the cog stops slipping? It's a Formula hub, EAI cog, DA lockring. Oh, and before I get crap for noob questions, yes, I did use the search feature.
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Old 12-11-05, 07:48 PM   #2
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Didn't you already post this here? Aluminum cog?
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Old 12-11-05, 08:06 PM   #3
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No. It's a steel EAI cog. The Al came from the hub. And I've never posted a thread before.
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Old 12-11-05, 08:10 PM   #4
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it SOUNDS like your hub is getting stripped, but it doesn't make any sense; formula/eai/da are all well-tested parts.

any chance of a really tight macro shot of the hub threads?
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Old 12-11-05, 08:14 PM   #5
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...And I've never posted a thread before.
I beg to differ: Slipping cog--hub damage?
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Old 12-11-05, 08:40 PM   #6
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My bad. I got a database error message from BF and i thought it didn't post. And I'll try to get a photo.
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Old 12-11-05, 08:47 PM   #7
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those little slithers of metal are NO good
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Old 12-11-05, 10:54 PM   #8
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I'll repeat what I was thinking in your earlier post.

That stripped aluminum didn't magically appear from the ether - it sounds like you're stripping your hub. Either it wasn't torqued down enough in the first place or your current setup isn't compatible. Maybe your cog is too narrow and the lockring isn't able to adequately tighten against it.

I hope it's a flip flop.

$0.02

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