BB30 Issue

Jon_1976 Posts: 690
edited April 2013 in Workshop
I recently got a BB30 equipped bike (CAAD8). Went for a spin and everything seemed fine, excellent in fact. Then, whilst in big chainring-smallest cog, I noticed the chain would rub on the front mech as I put more weight on the pedals. Is this a common thing with BB30 or should I just adjust the high limit & cable tension on the mech? I don't really want to mess with it as, apart from this scenario, its working beautifully.


  • antfly
    antfly Posts: 3,276
    It's just a front mech set-up issue, nothing to do with the BB.
    Smarter than the average bear.
  • onbike 1939
    onbike 1939 Posts: 708
    It does sound as if frame flex is causing this. It may be that a small adjustment of the "H" screw allowing the FD cage to move slightly out will cure this. Again, slightly more tension on the FD cable could work.
    Eating less porridge could work also.
  • Monty Dog
    Monty Dog Posts: 20,614
    Cranks and chainrings flex far more than the frame - you just need to adjust the front mech such that it's a touch more outboard to compensate.
    Make mine an Italian, with Campagnolo on the side..