Zepp Golf Max Club Speed Accuracy
I've read through the Zepp threads and have had people express concern about the club speed accuracy of Zepp. My concern is about the calculated Max Speed value as it might mean a significant swing change, as per the attached image
I tested Zepp with Trackman and the impact speed of Zepp vs Trackman is similar. Zepp will be a few miles higher but Trackman underreports club head speed and overreports smash (smash factors of 1.52). Zepp seems accurate at impact as long as you select the right club and change the shaft length in the setup to whatever you are using. I was getting between 109-113mph on Zepp and between 107-111mph on Trackman.
Just to review the app for those interested in purchasing it: Zepp will underreport backswing angle and overreport club plane comparison if the sensor is towards the outside of your hand rather than being in the middle of the hand. For things such as tempo, backswing angle and swing plane it seems very close to video comparisons. I'm happy with most things bar one, Max Club Speed
Going through the Zepp data I can see that my Max CHS during the swing on a number of my swings was north of 120, some at 130, one above 140 and one even at 170. I'll discard the 140 and 170 as those are clearly mistakes. But, is it really possible that I am slowing down 10-20 mph into impact??
I do use a modified Mike Austin swing and maybe I haven't implemented it properly. I've had lessons and they haven't picked up anything unusual mid-downswing that would indicate such a rapid slow down. In saying that, I've had a few people comment on my swing speed and I feel fast but, when I hit the ball the speed at impact is nothing WRX impressive
Do I trust the app and start changing my swing to make use of this supposed speed? Or, do I discount these data points although they are frequent enough to raise concerns?