Turns out my front chain rings are biopace, after I thought they had disappeared!
I've got a problem with the chain rubbing the front deraileur at a certain point every rotation. I only get this in the highest gear on the inner ring and it happens from about the 4th gear when on the outer ring. getting gradually worse when changing up to the highest gear.
Not sure if it's a trim or height problem or both :S
when in the small inner ring height should not be a problem.
But it could be height issue when on the highest gears on the outer ring.
- Dura ace deraileur front and back
- 105 cranks and chain ring
- unknown back sprocket set