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@mooks
Thought it would be more useful to recycle an existing thread instead of starting a new one but...
I'm confused...
Yesterday I was trackstanding in a queue of traffic, went to pull away (hard) and I had the old slip-KERCHUNK feel of the cog slipping. Didn't think too much of it until I got to the shop, went to skid stop and the whole thing just unwound.
Got the bike home, stripped the cog off and cleaned it up, and there's no sign of any damage. Put it all back together and took it outside - and the same happened. Got pissed off, took hub apart again, thought it could be chainring bolts slipping as well, so took off chainring and tightened everything up.
Got up this morning, rotafixed the cog on, went outside and went to stop/skid and again - slip-KERCHUNK. 'Sod this' I thought and in a fit of pique decided to rip the thread apart by pulling a big bad 'I'll show you who's boss' skid, only to pull a big bad 'I'll show you who's boss' skid, without the cog slipping at all. Did it again, and then another five or six times, and then I stopped because the neighbours were getting funny about the noise...
Wheel seems fine now - it stops, the thread doesn't unwind and it's not 'chunk'-ing back and forwards when I stop and pull off - but I can't relax and am convinced it's going to unwind and rip the thread off when I'm 20 miles from home.
What's happening Uncle FGSS?