Originally Posted by
IK_biker
joejack951 wrote:
Not so. That's what I thought too, but then this fellow chimed in:
Poster: Deanster04, post #8587332.
After some PM exchange, I can tell you he knows his stuff pretty well.
I realise that RD hanger geometry, and frame interface (angle) to said hanger have impact on this, but don't be too quick to dismiss the thought only because it did not work on joejack951's wife's bike.
So much about the naysayers...
In my defense, though I didn't state it, I was referring to Shimano products, given that the original poster has Shimano. Campy long cage rear deraillers are spec'd for a 29 tooth rear cog (as opposed to 27 for Shimano) so I'm not surprised that one can handle a 34 tooth cog with the right derailler hanger geometry. There might be a frame out there that lets a Shimano road derailler work with a 34 tooth cog but so far I have not heard of one.