Golf shaft system and golf shaft

A golf club shaft, comprising:

• a shaft having a shaft distal end, a shaft proximal end, a shaft outer diameter, a shaft length, a shaft mass, wherein the shaft has a maximum shaft flexural rigidity and a maximum shaft torsional rigidity, and each point along the shaft length has a shaft flexural rigidity, and a shaft torsional rigidity;
• the shaft having a butt portion joined by a coupler to a tip portion, wherein the coupler has a coupler mass that is no more than 15% of the shaft mass;
• the butt portion having a butt portion distal end, a butt portion proximal end, a butt portion length of 20-40″, and a butt portion mass;
• the tip portion having a tip portion distal end, a tip portion proximal end, a tip portion length, and a tip portion mass of no more than 30 grams;
• the butt portion formed of a non-metallic butt portion material having a butt material density, an average butt portion flexural rigidity, a maximum butt portion flexural rigidity, a minimum butt portion flexural rigidity, an average butt portion torsional rigidity, a maximum butt portion torsional rigidity, a minimum butt portion torsional rigidity, and each point along the butt portion length having a butt portion flexural rigidity, and a butt portion torsional rigidity;
• the tip portion formed of a tip portion material having a tip material density, an average tip portion flexural rigidity, a maximum tip portion flexural rigidity, a minimum tip portion flexural rigidity, an average tip portion torsional rigidity, a maximum tip portion torsional rigidity, and a minimum tip portion torsional rigidity, and each point along the tip portion length having a tip portion flexural rigidity, and a tip portion torsional rigidity;
• the average butt portion flexural rigidity is no more than four times the average butt portion torsional rigidity;
• the average tip portion flexural rigidity is 10-50 N*m2 and the average tip portion torsional rigidity is 5-40 N*m2;
• and
• the shaft flexural rigidity of a portion of the shaft located 5-36″ from the shaft proximal end is at least 100% greater than the minimum tip portion flexural rigidity.

A golf club shaft, comprising:

• a shaft having a shaft distal end, a shaft proximal end, a shaft outer diameter, a shaft length, a shaft mass, wherein the shaft has a maximum shaft flexural rigidity and a maximum shaft torsional rigidity, and each point along the shaft length has a shaft flexural rigidity, and a shaft torsional rigidity;
• the shaft having a butt portion joined by a coupler to a tip portion, wherein the coupler has a coupler mass that is no more than 15% of the shaft mass;
• the butt portion having a butt portion distal end, a butt portion proximal end, a butt portion length of 20-40″, and a butt portion mass;
• the tip portion having a tip portion distal end, a tip portion proximal end, a tip portion length, and a tip portion mass of no more than 30 grams;
• the butt portion formed of a non-metallic butt portion material having a butt material density, an average butt portion flexural rigidity, a maximum butt portion flexural rigidity, a minimum butt portion flexural rigidity, an average butt portion torsional rigidity, a maximum butt portion torsional rigidity, a minimum butt portion torsional rigidity, and each point along the butt portion length having a butt portion flexural rigidity, and a butt portion torsional rigidity;
• the tip portion formed of a tip portion material having a tip material density, an average tip portion flexural rigidity, a maximum tip portion flexural rigidity, a minimum tip portion flexural rigidity, an average tip portion torsional rigidity, a maximum tip portion torsional rigidity, and a minimum tip portion torsional rigidity, and each point along the tip portion length having a tip portion flexural rigidity, and a tip portion torsional rigidity;
• the tip portion mass is less than 60% of the butt portion mass, the coupler mass is no more than 60% of the tip portion mass, and the tip portion mass is no more than 25 grams;
• the average tip portion flexural rigidity is 10-50 N*m2 and the average tip portion torsional rigidity is 5-40 N*m2;
• and
• the maximum shaft flexural rigidity is no more than 300 N*m2, the maximum shaft torsional rigidity is no more than 250 N*m2, and the flexural rigidity of a portion of the shaft located 5-36″ from the shaft proximal end is at least 200% greater than the minimum tip portion flexural rigidity.

A golf club shaft, comprising:

• a shaft having a shaft distal end, a shaft proximal end, a shaft outer diameter, a shaft length, a shaft mass, wherein the shaft has a maximum shaft flexural rigidity and a maximum shaft torsional rigidity, and each point along the shaft length has a shaft flexural rigidity, and a shaft torsional rigidity;
• the shaft having a butt portion joined by a coupler to a tip portion, wherein the coupler has a coupler mass that is no more than 15% of the shaft mass;
• the butt portion having a butt portion distal end, a butt portion proximal end, a butt portion length of 20-40″, and a butt portion mass;
• the tip portion having a tip portion distal end, a tip portion proximal end, a tip portion length, and a tip portion mass of no more than 30 grams;
• the butt portion formed of a non-metallic butt portion material having a butt material density, an average butt portion flexural rigidity, a maximum butt portion flexural rigidity, a minimum butt portion flexural rigidity, an average butt portion torsional rigidity, a maximum butt portion torsional rigidity, a minimum butt portion torsional rigidity, and each point along the butt portion length having a butt portion flexural rigidity, and a butt portion torsional rigidity;
• the tip portion formed of a tip portion material having a tip material density, an average tip portion flexural rigidity, a maximum tip portion flexural rigidity, a minimum tip portion flexural rigidity, an average tip portion torsional rigidity, a maximum tip portion torsional rigidity, and a minimum tip portion torsional rigidity, and each point along the tip portion length having a tip portion flexural rigidity, and a tip portion torsional rigidity;
• the tip portion mass is less than 60% of the butt portion mass, and the coupler mass is no more than 60% of the tip portion mass, and the tip portion mass is no more than 30 grams;
• and
• the maximum shaft flexural rigidity is no more than 250 N*m2, and the maximum shaft torsional rigidity is no more than 200 N*m2, and the average tip portion flexural rigidity is at least 50% of the average butt portion flexural rigidity.