The document is a synopsis of a grip sizing webinar led by Jeff Summitt from Hireko Golf, covering the importance of different grip sizes, how to use calipers for sizing, and methods for building grip layers. It includes detailed measurements and calculations for various grip sizes based on gender and the necessary adjustments for grip core and shaft butt combinations. The webinar also emphasizes the need for proper staggering of build-up layers to avoid seams and overlaps in grip applications.

1. PROFESSIONAL GOLF CLUBS AT DOWN TO EARTH PRICES
Grip Sizing
with Jeff Summitt
Technical Director, Hireko Golf
Thursday October 27, 2009
2-3PM Eastern Standard Time
Audio settings are set on listen only.
Please post questions in the upper right hand corner Chat box.
Question & Answer period will be at end of webinar.
www.hirekogolf.com
800 367-8912

2. Grip Sizing Webinar Synopsis
Why different grip sizes in the first place?
Understanding how to use and read calipers
Understanding the fractions and decimals associated
with grip sizing
Learning how to read the charts
Building up under the lower hand and why
Setting up demo grip samples

3. Caliper Reading - Shaft
Measure 2” down to be on the safe side

4. Caliper Reading - Grip
Measure sides of grip 2” down using light pressure

5. Common Grip Sizes
Juniors
Ladies
Men’s
Midsize
Jumbo
PROFESSIONAL GOLF CLUBS AT DOWN TO EARTH PRICES
Sales 800 367-8912
Free Technical Service 800 942-5872

6. Converting Fractions to Decimals
1/32” = 0.031”
Men’s standard = 0.900”
Final size = 0.931”
1/16” = 0.063”
Men’s standard = 0.900”
Final size = 0.963”
0.931” ≠ 0.963”

7. Grip Sizing: 2” Below the Grip Cap
Grip Size Decimal Reading
Ladies -1/32" 0.819”
Ladies -1/64" 0.834”
Ladies Standard 0.850”
Ladies +1/64" 0.866”
Ladies +1/32" 0.881”
Men's -1/32" 0.869”
Men's -1/64" 0.884”
Men's Standard 0.900”
Men's +1/64" 0.916”
Men's +1/32" 0.931”
Men's +3/64" 0.947”
Men's +1/16" 0.962”
Men's +3/32" 0.998”
Men’s +1/8” 1.025”
PROFESSIONAL GOLF CLUBS AT DOWN TO EARTH PRICES
Sales 800 367-8912
Free Technical Service 800 942-5872

8. Grip Sizing by Grip Core & Shaft Butt
Grip Shaft Butt Layers of Build-Up Tape Required
Core Diameter Standard +1/64” +1/32” +1/16” +1/8”
M58 + .580” 0 2 4 9 18
M58 + .600” * 0 2 6 15
M58 + .610” n/p ** 0 4 13
M58 + .620” n/p * ** 3 12
M60 + .580” 3 5 7 12 21
M60 + .600” 0 2 4 9 18
M60 + .610” ** 1 3 7 16
M60 + .620” * 0 2 6 15
L56 + .560” 0 2 4 9 18
L56 + .580” * 0 2 6 15
L56 + .600” n/p * 0 3 12
L58 + .560” 3 5 7 12 21
L58 + .580” 0 2 4 9 18
L58 + .600” * 0 2 6 15
L60 + .560” 5 8 10 14 23
L60 + .580” 3 5 7 12 21
L60 + .600” 0 2 4 9 18
*Grip must be stretched approximately 3/4” longer over its length to reduce the diameter and create this size.
** Grip must be stretched approximately 3/8” longer over its length to reduce the diameter and create this size.
n/p - Not possible to achieve this grip size with stated grip core and shaft butt combination.
NOTE: In all cases it is assumed that a single layer of 2-way grip tape is used, masking thickness = .0035”.

9. Caliper Reading – Masking Tape
Calipers read:
0.607”
Shaft was:
0.600”
Difference is:
0.007” / 2
= 0.0035” our tape thickness

10. Grip Sizing by Grip Core & Shaft Butt
Grip Shaft Butt Layers of Build-Up Tape Required
Core Diameter Standard +1/64” +1/32” +1/16” +1/8”
M58 + .580” 0 2 4 9 18
M58 + .600” * 0 2 6 15
M58 + .610” n/p ** 0 4 13
M58 + .620” n/p * ** 3 12
M60 + .580” 3 5 7 12 21
M60 + .600” 0 2 4 9 18
M60 + .610” ** 1 3 7 16
M60 + .620” * 0 2 6 15
L56 + .560” 0 2 4 9 18
L56 + .580” * 0 2 6 15
L56 + .600” n/p * 0 3 12
L58 + .560” 3 5 7 12 21
L58 + .580” 0 2 4 9 18
L58 + .600” * 0 2 6 15
L60 + .560” 5 8 10 14 23
L60 + .580” 3 5 7 12 21
L60 + .600” 0 2 4 9 18
*Grip must be stretched approximately 3/4” longer over its length to reduce the diameter and create this size.
** Grip must be stretched approximately 3/8” longer over its length to reduce the diameter and create this size.
n/p - Not possible to achieve this grip size with stated grip core and shaft butt combination.
NOTE: In all cases it is assumed that a single layer of 2-way grip tape is used, masking thickness = .0035”.

11. Staggering Build-Up
Layers
Avoid seems or overlaps
Also avoid wrinkles!

12. Not Staggering Build-
Up Layers
You might save time by pre-cutting
pieces and layering…
But this will create gaps, seams or
overlaps in the end that could very
well could be felt underneath the
grip.

13. Examples
#1 - Men’s +1/32” with a 0.600” shaft
Grip Shaft Butt Layers of Build-Up Tape Required
Core Diameter Standard +1/64” +1/32” +1/16” +1/8”
M58 + .600” * 0 2 6 15
M60 + .600” 0 2 4 9 18
Or find a Men’s +1/32” version
#2 - Men’s +1/16” with a 0.600” shaft
Grip Shaft Butt Layers of Build-Up Tape Required
Core Diameter Standard +1/64” +1/32” +1/16” +1/8”
M58 + .600” * 0 2 6 15
M60 + .600” 0 2 4 9 18
Or use the midsize version

14. Examples continued
#3 - Men’s -1/64” with a 0.600” shaft
Grip Shaft Butt Layers of Build-Up Tape Required
Core Diameter Standard +1/64” +1/32” +1/16” +1/8”
L56 + .600” n/p * 0 3 12
L58 + .600” * 0 2 6 15
M60 + .600” 0 2 4 9 18
*To create a Men’s -1/64”, the grip must be stretched approximately 3/4” longer over its length to reduce the diameter and
create this size.
#4 - Men’s +1/8” with a 0.600” shaft and a Midsize grip
Grip Shaft Butt Layers of Build-Up Tape Required
Core Diameter Standard +1/64” +1/32” +1/16” +1/8”
M58 + .600” * 0 2 6 15
M60 + .600” 0 2 4 9 18
Or use the jumbo version

15. Shaft’s Rate of Taper

16. Grip Sizing: Positions A & B

17. Grip Sizing: 6” Below the Grip Cap
Grip Size Decimal Reading
Ladies -1/32" 0.699”
Ladies -1/64" 0.714”
Ladies Standard 0.730”
Ladies +1/64" 0.749”
Ladies +1/32" 0.761”
Men's -1/32" 0.749”
Men's -1/64" 0.764”
Men's Standard 0.780”
Men's +1/64" 0.796”
Men's +1/32" 0.811”
Men's +3/64" 0.827”
Men's +1/16" 0.842”
Men's +3/32" 0.878”
Men’s +1/8” 0.905”

18. Staggering Lower Hand Build-Up Layers

19. Demo Grips
Different models to show the various
cosmetics and material differences
Different sizes of the same grip
At least one grip showing reduced taper
under lower hand
Label everything clearly and use
undersized rather than Ladies
Update demo grips each year and clean or
replace ones that get worn or slick

20. PROFESSIONAL GOLF CLUBS AT DOWN TO EARTH PRICES
THANK YOU FOR ATTENDING!
The webinar will be posted on youtube.com/hirekogolf and on our blog at
blog.hirekogolf.com in just a few hours.
Jeff Summitt,Technical Director
jsummitt@hirekogolf.com
Technical Support 800 942-5872
www.HirekoGolf.com
Sales 800 367-8912