Why is my drivetrain so loud?
03-26-19, 02:26 PM
#1
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Why is my drivetrain so loud?
Hi
Wonder if anyone can help identify why my drivetrain is so loud please?
Couple of video links below. It's all freshly degreased and lubed, doesn't really sound like it's trying to change up or down and adjusting the barrel just makes it worse either way so I'm stumped.
None of the kit is very old either, less than 1000 miles, shimano 105 5800.
Any help or suggestions to try would be great!
Videos:
Can't post since I don't have 10 posts yet...
Wonder if anyone can help identify why my drivetrain is so loud please?
Couple of video links below. It's all freshly degreased and lubed, doesn't really sound like it's trying to change up or down and adjusting the barrel just makes it worse either way so I'm stumped.
None of the kit is very old either, less than 1000 miles, shimano 105 5800.
Any help or suggestions to try would be great!
Videos:
Can't post since I don't have 10 posts yet...
03-26-19, 02:36 PM
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03-26-19, 03:12 PM
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I would check the length of the chain. I had a new bike a couple of years ago and had the same issue. No matter what adjustments I made the noise continued. I checked the chain and it seemed to be a bit long. Once I removed a link it was nice and quiet.
03-26-19, 03:29 PM
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03-26-19, 03:30 PM
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What other symptoms might I have if it were too long?
03-26-19, 04:20 PM
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Did you have the chain off? Just asking to see if you have it routed right over the pulleys.
03-26-19, 08:11 PM
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Maybe you just ride in places that are too quiet and serene.
If everything seems to be running smooth on the rear and the chain is not fed incorrectly through the cage, then take a close look at the front DR trim adjustment. The procedure in the FD 5800 dealer manual might be a little hard to understand, but once you figure out what they are trying to achieve and what each adjustment does it becomes clearer.
If you got your 105 5800 group near the latter part of 2018 or after, then the front DR might actually be 105 5801 and the adjustment procedure is slightly different.
If everything seems to be running smooth on the rear and the chain is not fed incorrectly through the cage, then take a close look at the front DR trim adjustment. The procedure in the FD 5800 dealer manual might be a little hard to understand, but once you figure out what they are trying to achieve and what each adjustment does it becomes clearer.
If you got your 105 5800 group near the latter part of 2018 or after, then the front DR might actually be 105 5801 and the adjustment procedure is slightly different.
03-26-19, 08:48 PM
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I had a derailleur a while back whose B spring failed, and in small-small-ish gears where there was a lot of chain slack, the upper pulley would ride right against the freewheel, and clatter. In high tension gears it would pull away and act normally.
03-27-19, 05:19 AM
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There was another thread not too long ago about "dumbest repair mistakes you've made" or something like that. A common one, and I just did it a couple weeks ago, was not routing the chain through the derailleur pulley correction. There's a little tab that the chain should go under but it's easy to thread your chain over it. The bike rides but it makes a continuous noise as the chain rubs against that tab. Check your routing to rule that out. Good luck!
03-27-19, 03:37 PM
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So you get this noise in all the rear gears? Between the two vid's it seemed less noise in the small rear. Makes me wonder if jockey wheel is hitting on the gears. Did you replace the chain recently? If so, wrong chain or wrong length chain. Or b screw on the rear DR.
03-27-19, 03:39 PM
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or maybe not if those pic's you just put up are correctly showing the cage position when pedaling.
03-27-19, 03:44 PM
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03-27-19, 03:51 PM
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How many miles on chain and cassette?
Have you check chain for stretch??
Are you certain noise is from back???
Have you check chain for stretch??
Are you certain noise is from back???
03-27-19, 03:56 PM
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03-27-19, 04:10 PM
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is the cassette binding on the frame?
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03-27-19, 06:16 PM
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Is the lockring on your cassette torqued to spec? I had a similar noise on my bike, Ultegra 6700, it was most pronounced with the chain on the middle 3 or 3 cogs. Like you the cassette and chain were new, the derailleur adjustment was spot on, etc. I tried everything I could think of. Finally I pulled the wheel off with the intent of swapping back my older cassette just to compare. When I went to undo the lockring I was surprised that it took very little effort. So instead of swapping the cassette I cinched down the lockring tight, remounted the wheel and blessed silence from my drivetrain.
I can't explain it, the lockring wasn't loose enough that the cogs were moving around (at least not visibly). But it solved the problem.
I can't explain it, the lockring wasn't loose enough that the cogs were moving around (at least not visibly). But it solved the problem.
03-28-19, 02:25 AM
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Can’t help much but I’m curious to see how this pans out. I’m 90% sure that your amount of noise isn’t normal. Was your bike ever quieter? What parts have you taken apart and put back on before? Like someone above said, make sure the chain isn’t rubbing anything in the derailleur cage. Can we see the derailleur cage from the front, looking back? That’s where the little tab is.
Also make sure that you put the pulleys in the right spots (assuming you’ve looks right though), in the right orientation, with the bolts in the right spots (longer one on top) and torqued decently but not super tight.
B tension (screw that keeps your upper pulley from hitting the cassette) seems fine... but make sure it isn’t wrong.
Also make sure that you put the pulleys in the right spots (assuming you’ve looks right though), in the right orientation, with the bolts in the right spots (longer one on top) and torqued decently but not super tight.
B tension (screw that keeps your upper pulley from hitting the cassette) seems fine... but make sure it isn’t wrong.
Last edited by smashndash; 03-28-19 at 02:28 AM.
03-28-19, 03:56 AM
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Does it sound like this on the road, as opposed to in the stand? Could it be the frame or rear wheel is somehow under a different pressure by being in the stand?
E.g., if the stand / trainer is squishing the rear triangle of the frame, causing the derailleur to change angle by just enough to make an annoying noise...
E.g., if the stand / trainer is squishing the rear triangle of the frame, causing the derailleur to change angle by just enough to make an annoying noise...
03-28-19, 05:27 AM
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Does it sound like this on the road, as opposed to in the stand? Could it be the frame or rear wheel is somehow under a different pressure by being in the stand?
E.g., if the stand / trainer is squishing the rear triangle of the frame, causing the derailleur to change angle by just enough to make an annoying noise...
E.g., if the stand / trainer is squishing the rear triangle of the frame, causing the derailleur to change angle by just enough to make an annoying noise...
Someone else has suggested perhaps the jockey wheels are in wrong, I'm going to check this. I've not had them out but it's not to say they weren't installed wrong when the bike was built.