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Just had a yearly service done on my boardman road team carbo, first 150miles were great, now the drivetrain is so loud, like a horrible scrape type sound in the small cog, granny gears when climbing hills, I've uploaded a video to YouTube, any suggestions what could be causing it would be appreciated
http://youtu.be/5rm2tbOT_80

6 comments

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tonyhogg [47 posts] 3 years ago
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Halfords have attempted to tighten some cables back in that we're replaced after its yearly service but this has not stopped the noise

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dunnoh [211 posts] 3 years ago
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Sounds like the chain rubbing on the front mech.

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tonyhogg [47 posts] 3 years ago
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Any suggestions please?
http://youtu.be/5rm2tbOT_80
The chain doesn't not appear to be rubbing anywhere, I'm not cross chaining, only time I get minor chain rub is going flat out down a big hill but a can trim this out.

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RobeH [33 posts] 3 years ago
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sounds like your chain wants to go up a cog or down on the cassette,either a screw adjustment or adjust the cable tension should do the trick.

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Simon E [2985 posts] 3 years ago
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Was the rear gear cable replaced? Most likely is poorly adjusted rear shifting.

Either way, take it back and if they can't fix it then take it to a proper bicycle shop.

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dunnoh [211 posts] 3 years ago
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I know you say its not rubbing but have you checked your BB. If its loose the chainset may wobble a bit and rub on the front mech under load.