How to determine my problem?
08-07-08, 06:45 AM
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How to determine my problem?
Hello, I've posted before about my bike making a 'thud or grinding noise' from the pedaling. it isnt the bottom bracket as some suggested. but maybe...here is what i experienced. i unchained from the crankset.. and no grinding or bumpy feeling when i hand pedal. but when the chain is on it starts to grind (its not a loud obnoxious noise though...a little subtle) , the chain sits nicely on the sprockets(cassette?) so i believe it is tuned for shifting. i wonder if its possible that the cassette has a problem? or derailleur? is it possible that something is bent if i have never crashed it or anything? do cassettes have some kind of bearing like the bottom brackets? when i pedal sometimes, a loud crack noise will happen, so i wonder if this is the chain too...if its not a cassette issue could this be a need to replace the freehub? (i saw this on bicycletutor.com)...
if there are any possibilities that can be suggested, i'd appreciate it so much. thanks in advance!
if there are any possibilities that can be suggested, i'd appreciate it so much. thanks in advance!
Last edited by hkboy313; 08-07-08 at 07:14 AM. Reason: update "freehub"?
08-07-08, 06:51 AM
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Could be the chain. Is it well oiled or have any frozen links?
I had a grinding noise coming from my BB area before, but after inspection I found that the chain was extremely dry. Once I put some bioshield on it worked and felt great.
Also make sure that the chain isn’t ribbing on the derailleur.
I had a grinding noise coming from my BB area before, but after inspection I found that the chain was extremely dry. Once I put some bioshield on it worked and felt great.
Also make sure that the chain isn’t ribbing on the derailleur.
Last edited by Smooth James; 08-07-08 at 06:56 AM.
08-07-08, 07:01 AM
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Could be the chain. Is it well oiled or have any frozen links?
I had a grinding noise coming from my BB area before, but after inspection I found that the chain was extremely dry. Once I put some bioshield on it worked and felt great.
Also make sure that the chain isn’t ribbing on the derailleur.
I had a grinding noise coming from my BB area before, but after inspection I found that the chain was extremely dry. Once I put some bioshield on it worked and felt great.
Also make sure that the chain isn’t ribbing on the derailleur.
08-07-08, 07:36 AM
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no, no noise nothing from pedals. it sounds like its coming somewhere in the back. i dont want to bring it to the shop, as i want to learn this for myself/future/sport/hobby. im sure its noise in the back now.
08-07-08, 07:45 AM
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i found this on the park tool site.
The pawls may begin to slip and the bearings may become rough. If cleaning and lubricating the freehub does not resolve issue of slipping, sticking or noise, replace the freehub unit with a new one.
https://www.parktool.com/repair/readh...?id=45#shimano
sorry, but how do you define 'slip' in this case? like the crack noise ..slipping to catch on the ratcheting teeth? i feel this might be it..but not sure...maybe i am misinterpreting it...
The pawls may begin to slip and the bearings may become rough. If cleaning and lubricating the freehub does not resolve issue of slipping, sticking or noise, replace the freehub unit with a new one.
https://www.parktool.com/repair/readh...?id=45#shimano
sorry, but how do you define 'slip' in this case? like the crack noise ..slipping to catch on the ratcheting teeth? i feel this might be it..but not sure...maybe i am misinterpreting it...
08-07-08, 07:56 AM
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this is a bikedirect bike. dawes lightning. im wondering if the freehub is shimano or something from the eastern manufacturers. i've owned this bike for about 1 year...what is the usual age of freehubs if you ride almost everday about 20 miles? (maybe this depends...?) anyhow, thank you for your quick replies 
