Brake levers that double as shift levers were a huge advance in shifting when they first appeared. Finally, we didn’t have to move our hands down to shift from levers located on the ends of the handlebars, or off the bars to shift levers mounted on the frame. This made it much easier to always be in the right gear, which saves energy. And it also allowed racers to shift more quickly. Unfortunately, as wonderful to use as they are, some of these shifters do have an Achilles heel. Enter RoadBikeRider reader Dennis, who explains and asks for help.