Crunch when changing cogs!

[geopat]

Can someone advise what may be the cause of this?

Change from top gear down a cog and chain crunches and sticks/loses drive for a second...don't want it happening too often as dangerous.

Bike has just had new wheels fitted and a general check at LBS but does not seem right. There's a kind of ticking/clicking noise from wheels.

Any advice welcome, Thanks

 

[Crackle]

Do you mean on the front chainring or rear cassette.

Either way it sounds like it just needs adjusting - check out

www.sheldonbrown.com
www.parktool.com
www.bicycletutor.com

They will tell how to adjust front and rear deraileurs.

The clicking could be coming from the front derailleur. If it only happens when you turn the pedals, then that's likely. If it's happening all the time. could be the brakes. Does it stop when you apply the brake? If not that, I've known the wheel reflectors to make a clicking noise or a tyre catching a mudguard.

 

[Tynan]

straight back to LBS with a cold stare

 

[dudi]

agree with tynan here.

straight back and get them to finish the job they shoud have done in the first place.

it's probably just in need of a little adjustment. but there's no reason for you to do it if the bike shop cocked it up in the first place.