The LBS that I went to fit all types of riders, from MTB to Cyclocross to Roadies. I had no complaints riding my MTB with the original handlebars, but after the ends were cut off, I felt I had more control with the narrower handlebars; so I am very happy that my LBS did that. In addition, since my current handle bars are only a slight bit wider than my "optimal" and your coach recommends that wider bars are more stable, then my current handlebar width is probably perfect for me.