First images of the new 2022 Mizuno ST-G driver were seen at The Open Championship today. Weight track technology has returned, but on closer inspection there are some clear visible differences from the ST200G. The most notable being a third weight track in the back bottom of the driver.
The shape of the ST-G 220 head appears similar, but refined. It looks deeper and less rounded than the ST200G, which theoretically could improve stability and manipulate launch easier.