https://www.titleist.ie/teamtitleist/team-titleist/f/golf-clubs/46824/which-driver Hi all new member here and addicted beginner. Looking for my first real driver and have option between 913 d2 stiff shaft and 915 d2 m50 regular shaft. My 7 iron is around 140 yards Thanks en-USTelligent Community 10https://www.titleist.ie/teamtitleist/thread/259745?ContentTypeID=1Mon, 20 Jan 2020 15:15:59 GMT9ab519fc-5311-4952-85cd-0a0ceffb73fb:f23b0e53-3448-4b66-a3f8-42a79840207dDon OShafts have other characteristics than the stiffness. Based on which section of the shaft will flex the most, they can dramatically affect the launch and dispersion pattern. The m series in the 915 is a higher launching shaft than most. A factor we can&#39;t determine as we are not physically fitting you is how you transition at the end of your back swing.<br /><br /> Stiff versus regular is only important in comparing 2 flexes of the same shaft. One shaft&#39;s regular can be another shafts stiff, there is no standard across shafts for flex. Not to mention that Titleist driver heads come in 4 different lofts so it can be like comparing a 5 iron to an 8 iron.<br /><br /> Long story short, you at least need to hit both to decide for yourself or work with a qualified fitter or pro shop to find the characteristics of your swing for the appropriate loft and shaft combination. When I got tired of buying and selling/returning used drivers, it was a whole lot simpler going to a pro shop and getting fit for the driver that worked with my swing. I could have kept it for 4 years, which was a better investment than the 6 drivers I didn&#39;t keep in my first year of getting into golf.<div style="clear:both;"></div>