Hi, a quick question I just don’t find explained. How does the MPF relate to the clubhead size? For example, TM P770 and Srixon Z585 has similar MPF score, even though the P770 is significantly smaller clubhead. Does this mean for example a toe strike on P770 is more forgiwing, or does this mean a toe strike is equally bad on both clubs, but Z585 has larger area to work with in the middle, just because it’s physically larger?
Although head size can play a role in the MPF, it depends on where the center of gravity is located horizontally, vertically and rearward. I have seen large heads with short c-dimensions (cg distance from the hosel center line horizontally) that are not very forgiving. Sometimes slightly smaller profile heads can have longer c-dimensions and be really stable on toe hits. Really small profile heads generally all have too short a c-dim to be stable on toe hits. You might have more clubf ace on larger heads, but that does not automatically mean that the head will be forgiving. Again, it’s where the cg is. The two heads you listed are very similar with very little difference in the key measurements, which is why the MPF’s are so similar. The design with the longer c-dimension will be more stable on toe hits, but the difference on these two heads is so small you would not see a noticeable difference.