Bicycle Mechanics - What could this be?
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Quick question, I was riding my MTB recently and I noticed when I was in a certain gear (I think it is among the higher gears) I noticed that when I would pedal there would be like this mash, like this one large forceful down stroke almost like it skips, then after that its smooth. I have this suspicion that it has to do with RD adjustment, but if anyone has experienced this or knows what is going on, please any input is greatly appreciated.
05-05-06, 07:14 PM
1. RD misadjustment.
2. Worn chain
3. Damaged chain.
4. Worn cog
5. Sticking or frayed shift cable.
5. Poor chainline.
7. Worn chainring.
8. Generally dirty components. Lack of lube.
05-05-06, 07:17 PM
Could be a number of different things. Since it seems to happen in only certain gears, I would guess that it's cassette/chain related rather than freehub.
1) Worn chain and/or cogs. I once rode a chain too long. When I finally put on a new chain, it would slip on some of the more worn cogs of the cassette.
2) Broken teeth on a cog.
Hi sorry for responding so late,
So After checking my friends bike and riding alot, I noticed a couple of things...
It does this forceful downstroke more than once, if your pedailing hard it happens a good amount. It is still this really forceful downstroke that sounds like a loud crack/snap and the crank skips a little.
Also, his chain is very much so rusted, the casette/RD/Drive Train in general is really messy and needs a big clean up/lube. So my plan now is to give it a full cleaning, and then a nice lubing then see how it goes. Now if that doesnt work, I have a couple ideas. Also there are no broken teeth n the cog, that was one of the first things I checked.
Any other ideas/suggestions?
Oh, I will take some pictures tomorrow so people can see what they are looking at as far as the Drive train goes...
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