Mark Crossfield is asked this question by Kevin Duffy,
“Hi Mark, every time I get my swing speed measure, I am told I am in-between a regular and stiff flex shaft. I am about a 77-80 mph swing speed with a 7-8 iron and up to 90mpg with a driver. If you are between what would your advice be? I am a 6 handicapper and generally play very steady. I am not the furthest hitter in the world but don’t get myself into much trouble. Which should I go with?”
Mark quickly dispels the myth that swing speed has a correlation with the stiffness of a shaft. This is not yet widely known but something he believes will be common knowledge pretty soon.