Originally Posted by
oldbobcat
With good setup the third position cannot be inadvertently engaged without breaking something.
Therein lies the problem. Using the two inner positions on a 5700 triple brifter and attempting to shift to the locked out outer position can indeed break something. Using the two outer positions and setting the inner limit screw to lockout the granny position only leads to a slack cable if you shift to the nonexistent third ring. It's a nuisance but not a mechanical hazard.