Swing weight D1, D2,D3,D4
Posted 03 October 2007 - 06:24 PM
Posted 03 October 2007 - 07:19 PM
The numbers D1, D2 are simply the scale, and are historical in nature.
It takes roughly 2g of weight in the head to move from D1 to D2.
5 SW points equals 1/2 a flex, so if you add 10g to the head, you add 5 SW points and soften the shaft by 1/2 a flex.
Posted 05 October 2007 - 07:50 AM
Just my curiosity..
Posted 05 October 2007 - 08:37 AM
So basically, while that is probably a true rule of thumb, it isn't really practical. With exception of wedges, you are probably never going to add enough weight to the head to change 5 SW points.
Posted 05 October 2007 - 05:04 PM
If my driver has a SW of D2 and I cut off 0.5" from the butt end and the cutoff weigh's 3 grams, can I add 3 grams of lead tape at the butt end and still maintain the D2 SW?
The change in length is what changed the swingweight, not the removal of a 3g piece of shaft butt.
You would have to add weight to the head to bring the swingweight back up - approximately 6g - since shortening the shaft will reduce the swingweight by 3 points.
I wouldn't worry about it though.
Go hit it first before you think you need to change the swingweight.
Shorter clubs simply have a lower swingweight... If the shaft flex is soft enough for you, you'll still feel the head just fine.
Posted 06 October 2007 - 07:10 AM
Posted 26 December 2015 - 02:24 PM
However, any competent fitter can adapt heads to get smooth weight progression, even if they’re pretty far out of whack when they first get to him.
Cally XHP 15°/Altus or 3Deep/Striper H2
Cally XHP 18°/23°/ Fibersteel i80/Altus hb
Callaway X-Prototype 24°/Program 95
5-GW RBT/Program 95/130
Scratch D/D 54/Program 130
Mack Daddy PM Grind 58°
Posted 28 December 2015 - 12:50 PM
9 grams at shaft =1 sw pt
5 grams at grip = 1 sw pt
1/2 inch in length is 3 sw pts
Adjust accordingly.......and yes most manufacturers clubs are not to spec.....always have your clubs checked whether custom ordered or off the rack, do not assume because mizuno says their D2 that they are......this goes for every company....
Edited by dunn, 28 December 2015 - 12:53 PM.
Posted 28 December 2015 - 12:56 PM
Just my curiosity..
Posted 29 December 2015 - 05:42 AM
Also, categorizing this change as a percentage of a flex rating can be quite misleading (e.g. X gm == 1/3 or 1/2 of a flex). Keep in mind it is only a very rough generalization. It's not really the same as going down or up a different flex for that same shaft model.
Edited by Stuart G., 29 December 2015 - 05:47 AM.
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