Question: what is the difference between a regular flex and a senior flex?
Answer: Comparing the Two Certain shaft flexes are designed to match a particular swing speed. ... Senior flex shafts are appropriate for golfers who swing between 75 and 90 mph and carry a driver about 180 to 200 yards. Regular flex shafts are designed for golfers who swing 90 to 100 mph and carry a driver about 200 to 240 yards.