Originally Posted by
SoSmellyAir
It has been "dealt with" in the sense that Shimano tells us not to do it. For example, with the latest 2x11 drivetrain, Shimano dealer manual expressly states that there would be chain rub and noise while riding in the small chain ring with the four smallest cogs.
What Shimano is probably warning about is the chain rubbing on the front derailleur cage. What I'm was talking about, and in reply to _ForceD_'s posting, was the comment that the chain could
catch on the big chainring when in the small-small. I stated that won't happen with a 50/34 crank. Rubbing on the fd cage is another matter entirely.