The other pages of the section on shaft flex are outdated. The
substantive update was more than 15 years ago, and closer to 20 years
for most of the information. Today, in 2017, we know a lot more about
shaft bending behavior and its effect on performance. We also
understand a lot more what we don't
know, and perhaps even how to find that out.
I intend to rewrite this entire section, but it will take a
lot longer than my personally imposed deadline of June 1, 2017 for the
current round of updates. So I am
adding this page as a disclaimer. Do not take very seriously
information in the shaft flex pages, until it has been completely
updated. If you need information now, I have written a few articles
that include important bits and pieces of what I want to include here,
and can also point you to things I didn't write.
- Perhaps the best existing collection of shaft truths for
now are in my article, "Lessons
from ShaftLab". Read that first. Yes, it is ten years old.
But I have tried to keep the information there current.
- Russ Ryden has a wealth of detailed information on [mostly
high-end] shafts at his Golf Shaft Reviews web site.
- I know the academic community is working on a "Handbook of
Golf Science". It will include a chapter on shafts from Sasho MacKenzie
that is very up-to-the-minute. It is aimed more at the scientist than
the clubfitter and will likely make dry reading, but there is useful
information to be had there. I hope to incorporate some of it in my
- If you are interested in golf shaft spines -- directional
variations in flex -- I have written an article
on the subject.
I will update this list as I get more references worth looking at,
until the section on Shaft Flex is rewritten. I hope to get that done
before April 2018.
Thank you for your patience.