# Some math here!

Discussion in 'Grip' started by Accordaz, Feb 7, 2012.

1. ### Accordaz Regular Member

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Some math here! (Comparing grip size)

Hello there

My short story:
I'm going to get a Victor BS LYD (G2), because there's no G3 available there.
Here, the measures (by victorsport.com.tw):

The question is: What are these 8.1cm? surface cm2? If so and if the grip would be completely round we could calculate the radius:
G2: 8.1 / π (Pi) -> √ = 1.60571cm
G3: 8.5 / π (Pi) -> √ = 1.64488cm

Therefore, the average length is:
G2: 1.60571cm * 2 = 3.21142cm
G3: 1.64488cm * 2 = 3.28976cm

That means the difference (relating to the radius) is around 0,40mm
Therefore I need a overgrip with 1(!)mm thickness for a Victor G2 if my overgrips with 0,6mm matched well to my rackets with G3 well.

Well... I really doubt that my calculations are correct. Maybe they are correct calculated but are nonsense, because I'm still not sure what these 8.1 / 8.5cm are

#1
Last edited: Feb 7, 2012
2. ### Accordaz Regular Member

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Lol. What am I calculating for. There's also an english explanation:
"G"is the unit of grip diameter. G1 stands for 7.9cm, G2 stands for 8.1cm, and G3 stands for 8.5cm.

That means: radius (G2) 4.05cm vs (G3) 4.25cm
That also means 0,2cm or 2mm difference between G2 and G3!

Conclusion: If I'm used to 0,6mm with a G3 racket (= 4,25 + 0,6 = 4,85cm) I have to get a 0,8mm overgrip if I'm going to get a G2 racket (4,05 + 0,8 = 4,85cm)

Could someone reply to this and confirm my calculations?

#2
3. ### demolidor Regular Member

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Depends on how you will wrap it . With complete overlap (50%) an 0.6 has already become 1.2 (like here http://www.badmintoncentral.com/forums/showthread.php/81662-RKEP-Grip?p=1683504#post1683504)

So 5.45-4.05=1.4 => 0.7mm overgrip (0.75mm at least are available)

#3
4. ### Accordaz Regular Member

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Lol, yes. Simple, but effective! That's a very good idea to overlap! *facepalm about myself* Why didn't this variant cross my mind?!

Usually I overlap the overgrip as less as possible. Surely it's not possible to do an overgrip completely flat due the minimal overlaps I have on the overgrip. But eventhough there are some tiny "hills" I'd say my overgrip makes the grip 0,6mm thicker.

BUT! Wait, wait, wait...!
The grip has a radius of 4cm and more? LOL, that's not possible. Look at your yardstick (measuring tool). There's no way that the grip has a radius of ca. 4cm!

Damn... I really wanna finish this calculation " Eventhough the 50% overlap is a great idea.

And: 0,6mm (milimeters!!!) or 0,8 -> there's almost no (visible) difference. Can these declarations be real? I also can't imagine that there's a real feeling difference between 0,6mm and 0,8mm. These milimeters, guys!
I'm confused... :S

#4
Last edited: Feb 7, 2012
5. ### a|extan Regular Member

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wow
u must be a engineer.... count down even to the micro milimetre
i seriously just wrap until the feel i like...

usually i use have G5 racket... but oso there r G4... hence i just wrap the grip abit different to get what i want

#5
6. ### demolidor Regular Member

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G is the circumference ... (so indeed you should re-do the numbers)

And you will want to overlap like I did without any original grip underneath it (so just wood and some tape)

#6
Last edited: Feb 7, 2012
7. ### Accordaz Regular Member

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I will measure as soon as possible. But it seems to be circumference and NOT diameter as declared from VICTOR.

Btw: you didn't notice too that the numbers were (totally) wrong

#7
8. ### demolidor Regular Member

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Yes the BC community is so smart I don't expect to see mistakes . (also often english measurements are used for gripsize around here and for Victor according to the catalogue - G2 = 3 1/4inch, G3 = 3 3/8 and G4 3 1/4inch [=8,26 - 8,57 - 8,9cm] and I assume G1 would be 3 1/8inch)

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9. ### fiq_axis Regular Member

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so, the G5 is the biggest?

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10. ### a|extan Regular Member

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G5 for yonex is the smallest.

dun think there is a G5 for victor

grip size for victor is quite the reverse for yonex

Victor G2 is equal to Yonex G5.

#10
11. ### fiq_axis Regular Member

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thanks alex!
one more question, G5 is equal to 8.1cm and the G4 is 8.5cm right?

MATH makes us confuse. LOL

#11
12. ### Accordaz Regular Member

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grip sizes Victor / Li-Ning -> Yonex

People, don't give any attention to this maths lol, since alle these math stuff are wrong calclated due wrong used units

Grip sizes - comparison: Victor / Li-Ning -> Yonex
G2/S2 -> G5 (small grip)
G3/S3 -> G4 (medium grip size)
G4/S4 -> G3 (large grip size)

I've never seen any S4 (LN) grips before.
There are also some posts about a very small grip G6 (for Japan only)
Most of you will get used to S2 or S3.

#12
Last edited: Mar 25, 2012