I am planning on replacing the stock R shaft in my Taylormade R7 Superquad TP driver, I will need to confirm which shaft it is (55g, 65g or 75g) for an A Flex Graphite Design G-Tech (69g) shortened to 44.5in.
TM specs for the driver was SW D4, using a standard sized grip etc, will this potentially leave the swing weight the same, lower or raise it?
Unless the shaft profile in the stock is different, will this shaft help potential club head speed?
The 4 gram additional shaft weight might only increase the swingweight by 1/2 a point, if any (9grams of shaft weight generally equals one swing weight point, but balance point variations can effect this). As far as the flex profile helping, difficult to say. I would say the shorter length at 44.5″ and the more flexible shaft could be easier to swing and easier to hit solid, which should yield better results. I don’t have the flex profile data on the stock shaft you are replacing, so I can’t compare the actual profile numbers. Still, it’s an inexpensive experiment that could give you better performance for sure. Worth a try in my opinion.
I would need to know the weight of the shaft you are replacing to know what the the change in swing weight might be. Once you know that, let me know.
On the potential to help clubhead speed, basically there are only two things we can do to golf clubs to increase club head speed. make them longer and lighter (overall weight). Of course, the trade-off with making a club longer is potential loss of accuracy. Lowering the overall weight is mostly accomplished through shaft weight. Rarely do I see a simple change in shafts that are similar in weight improve clubhead speed. There can be improvement in performance (accuracy, consistency, feel) if the dynamics of the new shaft are a better fit, but noticeable increases in clubhead speed, without a change in length and overall club weight, rarely (if ever) occur.