I just bought a new 21-speed hybrid bike a few weeks ago but have noticed a clicking noise when I am in two gears -- middle chainwheel and 4th and 5th largest freewheel. The clicking occurs about 2 times per second when cruising at a normal speed (20 kmh) I've taken it into the store but they can't find anything. The derailleur alignment has been checked and seems OK.
I was wondering why there would be this clicking noise on those particular gears. When I'm on the big chainwheel and the same freewheels 4 and 5, the noise disappears. I'm stumped.
Thanks for any suggestions.
ps This is my first post to this forum.