slipping cog
Thread started by
KiMS1 at 01.30.09 - 11:23 am
i have a pretty decent (not high end but definitely not cheap) rear hub and i think the cog is slipping.
it only slipped ONCE.
and it slipped when i was pedaling FOWARD against wind up a hill.
NOT WHEN I WAS SLOWING DOWN/SKIDDING.
is this something i should worry about?
maybe it was tightening down on itself some more?
is it time to buy a new hub?
are my threads stripped?
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It could have been tightening some more. Make sure you try to tighten your lockring now that it's slipped.
If your threads were stripped, the cog would spin without moving your wheel.
richtotheie01.30.09 - 11:26 am
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could it maybe partially stripped?
like, can it partially strip, then maybe strip some more?
i rode home fine and slowing down and speeding up was fine, tinkering around with it, everything felt solid.
KiMS101.30.09 - 11:27 am
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Whatever you do, DO NOT put a brake on the bike.
You must resist!
User101.30.09 - 11:28 am
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Kims, try and tighten your lockring, if you CAN than it most defitely just got tighter and i wouldn't worry about it!
richtotheie01.30.09 - 11:31 am
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or you an jb weld it, thats what i did and I havn't died yet. haha
mattspeed01.30.09 - 11:44 am
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If it slipped forward then it is probably OK. When it slips forward the cog gets tighter. This means your lockring is now looser because the cog got moved away from it as it tightned. Take it to a bike shop or find someone with a lockring tool and have the cog and lock ring tightend down.
If you just purchased the wheel or if this is the first time you really cranked on it then this is fairly normal. Most fixed cogs need to be tightened after the first 100 miles of riding, after that they tend to stay nice and tight.
If it continues to slip after tightening the lock ring then take the lock ring and cog off and see if the threads are stripped. If they are you will need to put the cog on the other side of your hub unless it is not double threaded on both sides in which case it's time for a new hub.
stillline01.30.09 - 11:59 am
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That started happening to me after riding up the Best Buy parking structure ramp. It got worse, and the shitty cog that came with my bike stripped my hub. Keep an eye on it...
ioioio01.30.09 - 12:21 pm
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is it bc of a shitty hub or a shitty cog?
KiMS101.30.09 - 1:00 pm
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You ride everyday right? When is the last time you replaced the chain. Buy a new chain at your local bike coop and check the lockring at the same time. Go for the 1/8 ss chain the road chains wear out faster mine was jumping teeth after 3000 miles. I would trackstand at an intersection and when I would start to go it would slip, same with skidding.
larsenf01.30.09 - 1:14 pm
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@larsen
i have a pretty hefty bmx chain on there.
whats the usual amnt of miles to be traveled before things start fuckin up?
i think the cog just tightened itself more bc i was going up hill with a pretty good amnt of headwind and i havent put that much pressure on the cog since i recently gotten the wheel built.
but i have had that chain for awhile.
its probably best to get the chain redone regardless.
KiMS101.30.09 - 2:15 pm
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you should replace your chain every 2-3k. it stretches over time and will slip over the teeth. if this is the case you should be able to get it to slip if you skid hard enough. If you just got the wheel built though i would bet someone fucked up.
larsenf01.30.09 - 2:41 pm
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only use a 1/8th chain if your cog and chainring are both 144bcd. if your drive train is 130bcd (meant for a road chain) and you use a 1/8th chain on it your ride make a lot of noise and you will wear out your chainring and cog super fast.
ruinedbyidiots01.30.09 - 3:39 pm
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