RUNNING TOP-RATED NEUTRAL SUPPORT GUIDANCE TRAIL WAVE RIDER 20 MIZUNO-1906 INDOOR FOOTBALL JAPAN SPIRIT GOLF PERFORMANCE FITTING GOLF CLUBS GOLF FOOTWEAR GOLF BAGS GOLF BALLS GOLF GLOVES GOLF ACCESSORIES ATHLETES HONG KONG INDONESIA PHILIPPINES MALAYSIA NEW ZEALAND SINGAPORE THAILAND VIETNAM Instagram Facebook PERFORMANCE FITTING SYSTEM AT MIZUNO WE BELIEVE THAT CUSTOM FITTING IS CRITICAL TO PLAYING BETTER GOLF. NO TWO GOLFERS ARE ALIKE, AND OUR CLUBS ARE DESIGNED WITH THIS IN MIND. MIZUNO WANTS TO MAKE SURE THE IRONS YOU USE ARE THE RIGHT IRONS FOR YOU. Clubhead Speed How fast the clubhead and shaft are moving during the swing. Tempo How quickly the player transitions from the backswing to the downswing. Shaft Toe Down A measure of the bowing of the shaft in a downward direction during the downswing. Shaft Kick Angle The amount of shaft forward bending during the downswing motion. Release Factor How and when the clubhead and shaft are releasing during the downswing motion.