Patent ID: 8475291

Claim:
A method comprising: categorizing a plurality of golf club shafts into a plurality of golf club shaft sets based on a flexibility of the plurality of golf club shafts; determining a golfing level of an individual to whom a proposed golf club shaft set will be matched; and selecting the proposed golf club shaft set from the plurality of golf club shaft sets of different golfing levels to fit the golfing level of the individual; wherein: categorizing the plurality of golf club shafts comprises: measuring the flexibility of the golf club shafts using a flexibility measuring mechanism configured to apply a predetermined force to the plurality of golf club shafts, wherein the plurality of golf club shafts are decoupled from any golf club heads when the flexibility is measured; the plurality of golf club shaft sets comprises: a first golf club shaft set with a first shaft flexibility range and configured for a high golfing level; a second golf club shaft set with a second shaft flexibility range and configured for a medium golfing level; and a third golf club shaft set with a third shaft flexibility range and configured for a low golfing level; the first shaft flexibility range is greater than the second shaft flexibility range; the second shaft flexibility range is greater than the third shaft flexibility range; the proposed golf club shaft set comprises proposed golf club shafts and a proposed shaft flexibility variance; and the proposed shaft flexibility variance of the proposed golf club shaft set is irregular among the proposed golf club shafts within the proposed golf club shaft set.