For anyone considering new handlebars and want to know the pros and cons of a slight variation in width:
What width of handlebars is best for me?
If you’re a sportive or casual rider, and aerodynamics are lower on your list of priorities than behind ride feel and comfort, consider choosing a slightly wider set of handlebars. This will help with breathing and bike handling. If, however, you’re racing regularly, stick with bars that are the same width as your shoulders as this strikes a good balance between aerodynamic advantages and bike handling capabilities. If you’re really serious about speed, you could even consider going a little narrower, just make sure your bike position is well set up and you have a good riding style. This will help you become more aerodynamic, which will have huge benefits for solo breaks or long stints on the front of a peloton.