Finally got this done. I was not happy with all the BS charts for grip size. I wanted to know the diameter where your (upper) hand goes and no data existed on that so I did my own test.
The grips were all measured 4" from the end of the grip using a digital vernier caliper. It was a cheap vernier and only measured to two decimal places but it repeated very well.
So here it is. I wanted to put it on a spreadsheet but there are so many I just decided to manually put it in this thread. Feel free to add your own data if you want.
Grip Size Brand Model Club Core Size Installation Method Size
STD Titleist (GolfPride) Tour Velvet Iron .60 solvent/tape .84
STD GolfPride CP2 Pro Iron .60 air/no tape .83
MID GolfPride CP2 Pro Iron .60 air/no tape .91
STD Lamkin Z5 TT 3 Hybrid .58 air/no tape .82
STD Lamkin Z5 TT 4 hybrid .58 air/no tape .81
STD Lamkin Z5 TT 3-wood .58 air/no tape .83
STD Lamkin Z5 TT 3-wood .58 solvent/tape .83
STD GolfPride MCC +4 Driver .60 solvent/tape .84
STD GolfPride MCC +4 Driver .60 air/no tape .84
As you can see the different core size didn't seem to make much difference nor did the installation method. I did note the Titleist grips when removed had a thicker two sided tape (probably off a tape dispenser) then the pre-cut "strips" I buy which would explain the slightly larger diameter. The most diameter variation was in the Lamkin Z5 TT grips. The GolfPride seemed more consistent.
Conclusion: Grips or installation method didn't make enough difference in grip diameter to worry about any of this.
The grips were all measured 4" from the end of the grip using a digital vernier caliper. It was a cheap vernier and only measured to two decimal places but it repeated very well.
So here it is. I wanted to put it on a spreadsheet but there are so many I just decided to manually put it in this thread. Feel free to add your own data if you want.
Grip Size Brand Model Club Core Size Installation Method Size
STD Titleist (GolfPride) Tour Velvet Iron .60 solvent/tape .84
STD GolfPride CP2 Pro Iron .60 air/no tape .83
MID GolfPride CP2 Pro Iron .60 air/no tape .91
STD Lamkin Z5 TT 3 Hybrid .58 air/no tape .82
STD Lamkin Z5 TT 4 hybrid .58 air/no tape .81
STD Lamkin Z5 TT 3-wood .58 air/no tape .83
STD Lamkin Z5 TT 3-wood .58 solvent/tape .83
STD GolfPride MCC +4 Driver .60 solvent/tape .84
STD GolfPride MCC +4 Driver .60 air/no tape .84
As you can see the different core size didn't seem to make much difference nor did the installation method. I did note the Titleist grips when removed had a thicker two sided tape (probably off a tape dispenser) then the pre-cut "strips" I buy which would explain the slightly larger diameter. The most diameter variation was in the Lamkin Z5 TT grips. The GolfPride seemed more consistent.
Conclusion: Grips or installation method didn't make enough difference in grip diameter to worry about any of this.