Boardman noise since service

tonyhogg

Just had a yearly service done on my boardman road team carbon and the first 150miles were fine, but now the drivetrain is so noisy, like a horrible scraping type sound, hard to explain so I've uploaded a video to YouTube, it's had some cables replaced on its yearly service so halfords guessed these needed retightening, but it's made no difference, still really loud in the small cog at the front, granny gears at the back for climbing hills, hope someone could help me out with suggestions what it could be or I'll have a lot of trips to halfords to sort it
http://youtu.be/5rm2tbOT_80

diamonddog

Could be rubbing on dérailleur. If might just be the cable tension, try adjusting it in eighth or quarter turns max.
Clockwise to tighten , anti to loosen. Halfords are not renowned for their bike mechanic skills it seems. :shock:

tonyhogg

The chain doesn't appear to be rubbing, its louder underload, pretty quiet on a work stand, only time I get chain rub noise is in the big ring last 2 gears but I can trim this out

diamonddog

Take it to your LBS and let them have a look at it but I would avoid Halfords as since they did your service you have the problem. Some Halfords are better than others for servicing but none are great or so I have heard.

diamonddog

Sorry when you say last two gears do you mean high gears?

neal1984

Sounds like the bottom bracket. I had this on my last boardman and had it replaced twice in 1000 miles under warranty.

tonyhogg

I'm not cross chaining, I get a small amount of chain rub going flat out down hills last 2 gears, hardest ones to pedal, I'm doubtful it's the bb got my heart set on another problem, replace the bb30 regrease it, torque it up blah blah I want it to be something more exotic to be honest

tonyhogg

Does anyone have any more suggestions what could be causing this loud drivetrain noise please? http://youtu.be/5rm2tbOT_80 I'm at a loss to explain it

slowbike

Just sounds like chainrub on the front derallieur to me ... what happens when you've got it in the big ring?

tonyhogg

It gets a bit quieter in the big ring, very noisy in the small chain ring, I wish I could explain it better, you can't really hear any problem on a workstand either

sparklehedgehog

Bottom bracket. I had this on a hybrid team. Known issue on boardmans

desweller

Sounds like it wants to change gear at the back. Does it always change gear when you upshift and downshift on the rear derailleur?

pilot_pete

Have you got a photo close up of the front derailleur in the 'suspect gear' from directly above?

Also, a picture of the rear derailleur and cassette from directly behind?

Might help to see anything obvious.

PP

tonyhogg

Yep it always changes gear perfectly on the rear up shift or downshift no probs, I've left it with my local hellfrauds sorry halfords with their boardman "gold" mechanic, I'll take some close up pics when I get it back, I'm certain they won't have fixed it, thanks for the help and advice so far

montyburns56

It could be that they have removed the chainset and missed out/added some spacers so that the chainset isn't correctly aligned with the rear sprockets any more.