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a "hitch" in my drivetrain(10 posts)

a "hitch" in my drivetrainPaulCL
Jul 21, 2002 4:51 PM
And its' driving me nuts. Here's the 411...

I usually feel it while in my 16 - 17 cogs in the big ring -campy 10sp record. It is consistently in the 2nd or 3rd pedal stroke at the same point in the stroke. Nothing major, just a little 'hitch' ...for lack of a better word.

What did I look for??
...a bad link in the chain. nope
...a worn chain. I replaced the chain. nope
...sensor hitting the magnet. nope
...bad pulley wheel. nope
...overly sensitive rider. perhaps?

Any other suggestions on what to look for??
could it possibly be a bad cassette? nmweiwentg
Jul 21, 2002 5:36 PM
'newer' cassette (nm)PaulCL
Jul 22, 2002 5:14 AM
Had the same thingishmael
Jul 21, 2002 5:53 PM
Are you sure its always in the same spot in the pedal stroke in all the gears? Since it's every second or third pedal stroke it sounds like your chain. I had the same thing. the problem was the quicklink on the ten speed chain, its pretty minor but annoying. I put on a new link and it works perfectly.
Same exact spot everytimePaulCL
Jul 22, 2002 5:17 AM
I have a Craig Superlink on the chain. I have looked hard at the link, watched it run through the derailleur, etc...
It could be the link, but I don't think so. But you are right, with it being in the exact spot each time, it sure points to the chain. Maybe I'll throw a new link on the chain and try it out.

Any suggestions other than the Craig??
Same exact spot everytimecurlybike
Jul 22, 2002 5:22 AM
While observing the chain at the lower der pulley, slowly turn the cranks backwards and see if there is a spot where the chain stays bent as it comes off the pulley. That will cause the hitch. Check for a tite link there. Also check the superlink and see if it has gotten slightly wider than the rest of the links. If so it may be catching on the next cog and hopping up.
another possibilityfeathers mcgraw
Jul 22, 2002 4:29 AM
One thing that it could be is a slightly mis-adjusted derailer. The chain could be catching on the ramp of an adjacent cog and slipping off.
i'd suspect the permalink (nm)ColnagoFE
Jul 22, 2002 6:31 AM
re: Same point in pedal stroke - not chainMike Prince
Jul 22, 2002 6:47 AM
I really doubt it is the chain or superlink if the sensation is at the same exact point in the pedal stroke every time. The cranks being at a given point will not correlate at all to the position of a given chain link.

A few questions:

- Can you feel it when backpedaling? If so, is it at the same point as the forward stroke?
- Are the chainrings worn? This could explain the "same spot" sensation. Also he said this only happens in the big ring.

Where I would look:
1. Pedals (bearings and tightness on crank)
2. Cleats (worn or debris)
3. Chainring wear
4. Chainring bolt tightness (or one could be cracked)
5. BB (How many miles on it?)

Not to discount the advice of other posters, but I think you'll be looking for a long time if you think it's the chain. Hope this helps.
re: Same point in pedal stroke - not chainPaulCL
Jul 22, 2002 7:15 AM
I haven't checked while riding backward. I'll try it. The chainrings don't appear worn, but it is something to consider after a well-lubed 7000 miles.
It is at the same point in the pedal stroke, but not every stroke. Its' on every 2nd or 3rd stoke...I don't remember which. If it was at the same point on EVERY stroke, then I would start thinking BB, chainring, cleats, etc...

I think I will try looking at the chain must harder. Next step would be to replace the superlink, at least temporarilly.

While cranking up a hill yesterday, I kept imagining doing a Tyler Hamilton and going over the bars because of a busted chain. My chain is only 500 miles old, so I'm being a little paranoid.

Thanks for the input all. Paul