Hraak
07-29-17, 10:34 AM
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Hraak
Hi, bought road by, cheap, but already bought. New. All ok, but on "hi" and 7 speed in area right pedal and front derrauler, when pedal going
from top to bottom it is some noise /hraak/ on stand no problem - all ok - somebody can advice, thank you
from top to bottom it is some noise /hraak/ on stand no problem - all ok - somebody can advice, thank you
07-29-17, 04:39 PM
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is the crankset loose? that can make bad noise when pedaling...
grab pedal arms, then push pull side way... clunk? you need to adjust or replace crank bearings.
no clunk? inspect the big front sprockets... bent? replace or straighten them.
no problem found? the front derailleur needs aligned/adjusted.
grab pedal arms, then push pull side way... clunk? you need to adjust or replace crank bearings.
no clunk? inspect the big front sprockets... bent? replace or straighten them.
no problem found? the front derailleur needs aligned/adjusted.
07-29-17, 07:26 PM
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Since the bike is brand new, I'll assume it's a relatively simple adjustment, rather than some serious worn or damaged parts.
It's hard to "hear" written sounds, but my first guess (purely an educated guess) is that the front derailleur is mis-adjusted and the chain sprocket slightly warped, as most are, so that it rubs part of the time on the derailleur cage. That would make a sound similar to a saw, as in z-z-z-z-z...........z-z-z-z-z-z......... etc.
You can check visually by looking straight down at the chain inside the derailleur cage as you pedal.
For what it's worth, when pedaling on the road, there's some deflections that won't happen in the stand, which accounts for the problem not showing except when riding.
Of course it could
It's hard to "hear" written sounds, but my first guess (purely an educated guess) is that the front derailleur is mis-adjusted and the chain sprocket slightly warped, as most are, so that it rubs part of the time on the derailleur cage. That would make a sound similar to a saw, as in z-z-z-z-z...........z-z-z-z-z-z......... etc.
You can check visually by looking straight down at the chain inside the derailleur cage as you pedal.
For what it's worth, when pedaling on the road, there's some deflections that won't happen in the stand, which accounts for the problem not showing except when riding.
Of course it could
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FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
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FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
07-31-17, 03:02 PM
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since the bike is brand new, i'll assume it's a relatively simple adjustment, rather than some serious worn or damaged parts.
It's hard to "hear" written sounds, but my first guess (purely an educated guess) is that the front derailleur is mis-adjusted and the chain sprocket slightly warped, as most are, so that it rubs part of the time on the derailleur cage. That would make a sound similar to a saw, as in z-z-z-z-z...........z-z-z-z-z-z......... Etc.
You can check visually by looking straight down at the chain inside the derailleur cage as you pedal.
For what it's worth, when pedaling on the road, there's some deflections that won't happen in the stand, which accounts for the problem not showing except when riding.
Of course it could
It's hard to "hear" written sounds, but my first guess (purely an educated guess) is that the front derailleur is mis-adjusted and the chain sprocket slightly warped, as most are, so that it rubs part of the time on the derailleur cage. That would make a sound similar to a saw, as in z-z-z-z-z...........z-z-z-z-z-z......... Etc.
You can check visually by looking straight down at the chain inside the derailleur cage as you pedal.
For what it's worth, when pedaling on the road, there's some deflections that won't happen in the stand, which accounts for the problem not showing except when riding.
Of course it could
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