How to Determine Spline Torque Values

All graphite golf club shafts start out as a flat sheet. That sheet is then rolled into the shaft shape, and where the two edges of the sheet meet is known as the spine. Aligning this spine opposite the face is known as spline align, or "spline." The torque of this spline is in direct correlation to the flex of the shaft, which can be any one of five different categories: ladies "L," amateur or senior "A," regular "R," stiff "S" and extra stiff "X."

Instructions

    • 1

      Locate the information stamped on the outer wall of the shaft. Usually this information is near or within the brand name logo, on the middle of the shaft on the opposite side from what is visible when addressing the ball.

    • 2

      Locate the specific letter that determines the flex: "L," "A," "R," "S" or "X." This flex must match your specific swing speed or the spline torque will not assist you in any way.
      105+ mph - "X" flex
      90-105 mph - "S" flex
      80-95 mph - "R" flex
      70-85 mph - "A" flex
      70 mph or lower - "L" flex

    • 3

      Take into account the numerical digits immediately following the flex letter. The higher the number, the heavier the shaft within each category. For instance, S-90 is heavier than S-85 and requires more strength to swing properly. It may take some trial and error, but the proper flex and weight are crucial if the spline torque is to help with your accuracy or distance.

    • 4

      Allow a professional club fitter to insert the shafts into each of your clubs after locating the spine, to ensure they are all situated appropriately. This should only be done after you have determined the proper flex and weight for your strength and swing speed.