Originally Posted by
halfspeed
I double shift quite often. It's especially useful when transitioning from the big ring to the small on a climb and I'm I don't want to go from big/small to small/small. Hit both thumb shifters at the same time about the same number of clicks and I can go from big/small to small/middle for a slightly easier gear.
Sure you do, but gearing is still arranged to allow two ranges of gears one on the big ring, one on the small. Double shifts occur when moving between the ranges, which is much less frequent than shifts within the ranges. Most shifts are within those ranges, not between them. If I am wrong about that, just say so.