Did 35 miles or so yesterday and towards the end the gears were rubbing on the large chain ring and small cogs, only when giving it some effort though. Its as if something moves or bends when putting some pressure on it. Gonna start from scratch again setting up wise over the next couple of days.....so annoying though because it makes a horrible noise making me back off when getting some speed up thinking somethings gonna give.In answer to some of the recent posts about dodgy gears and rubbin etc............I can assure you that the gear set the T£ comes with CAN be set up reasonably sweet.
I knew what I'd bought.
Cheap and cheerful gears and an aftermarket mickey-mouse cassette and chain set.
It takes a bit of nowse to keep it running as smooth as it can be, But.......if you can get it so that the small chain ring runs the big cogs.....the big ring runs the small cogs and most of it runs without rub on the middle ring...then you have it sorted. And yes..it can be done without agonising over whether it needs a 9 speed chain or whether the front mech is new or old Sora. Just needs constant fettling!!!
If I'd wanted Dura-Ace (or I' I#d KNOWN I wanted Dura-Ace) I would have bought it in the first place.
Or probably not!
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So I've learned a valuable lesson over the past couple of weeks - Btwin tubes seem to be be pretty naff.
Check your cleats if you ride clipless
So many possibilities. ...check chain ring bolts and check chain ring isn't knocking against the front mec, ensure the gear cable isn't knocking against anything. See if it does it when riding out of the saddle....if not check saddle and seat post. Is there any lateral play if you hold by crank arms and try rocking sideways-if so bottom bracket. ...