But excessive heat built up in the trunk of the car in areas where the temperatures get very hot can possibly affect the bond of the shaft to the clubhead.
Shafts are secured to clubheads with special high-strength epoxy glues. If the heat in the trunk of the car builds up day after day to a temperature approaching 200-degrees Fahrenheit, over time it is possible that the epoxy bond holding the shaft to the clubhead may start to break down and eventually cause the head to come flying off the shaft when a ball is struck.
So the best advice is that if you live in super-hot climate areas, take the clubs out of the trunk and store them in the garage where the temperature never approaches 200F.

