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Stiffness of Shaft
Medium (Flexible)
Partial transfer of energy from wrist action. Flexible shaft stores energy at swing motion giving more repulsion of shuttlecock at impact from the racket. Good for defensive and control play style (clears, overheads, returning smashes, etc...)
Stiff (Limited Flexibility)
Reasonable transfer of energy from wrist action, good for both defensive and offensive play style
Extra Stiff (Minimum Flexibility)
Maximum transfer of energy from wrist action. Minimum shaft movement gives high accuracy on shuttlecock positioning. Ideal for offensive play style (smashing, net kill, etc...)
Some manufacturers show increasing stiffness by decreasing value. For example, SOTX and Tactic indicate stiff shaft as 8.0-8.5, and flexible shaft as 9.0-9.5.
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Frame Shape
Conventional - Oval Head Shape (smaller sweet-spot)
Isometric - Square Head Shape (wider sweet-spot)
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Frame Composition
Base Material :
Aluminium
Hi-Modulus Graphite
Ultra Hi-Modulus Graphite
Nano Carbon / Fullerene
Mesh :
Titanium Composite (Utility Titanium)
UltraTitanium
gForceTi
UltimumTi
MicroTi
ElasticTi
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Shaft Composition
Base Material :
Aluminium
Hi-Modulus Graphite
Ultra Hi-Modulus Graphite
Nano Carbon / Fullerene
Mesh :
Titanium Composite (Utility Titanium)
UltraTitanium
UltimumTi
MicroTi
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Racket Weight
2U - 90-94g
3U - 85-89g
4U - 80-84g
5U - 75-79g
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Total Length (frame tip – handle end)
665mm / 26.0 inches - Standard
675mm / 26.5 inches - Long
680mm / 26.8 inches - Ultra Long
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Grip Size
Grip Size is the Circumferencial Thickness of a Grip Handle (with the original leather grip on)
Yonex G2 - 4.00 inches
Yonex G3 - 3.75 inches
Yonex G4 - 3.50 inches
Yonex G5 - 3.25 inches
Hi-Qua / Tactic G2 - 3.25 inches
Hi-Qua / Tactic G3 - 3.50 inches
Hi-Qua / Tactic G4 - 3.75 inches
Hi-Qua / Tactic G5 - 4.00 inches
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String Tension Tolerance
Aluminium & Hi-Modulus Graphite Frames
Main 18-20lbs (8-9kg)
Cross 20-22lbs (9-10kg)
Ultra Hi-Modulus Graphite / Nano Carbon Frames
Main 18-26lbs (8-12kg)
Cross 20-28lbs (9-13kg)
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Balance Point from Grip End
270-280mm = Head Light (for Defensive & Control Play)
275-285mm = Head Balance (for All-Round Performance)
285-295mm = Head Heavy (for Offensive Play)
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Understanding Yonex Racket Codes
All genuine Yonex rackets have 2 sets of Laser-Etched serial number, one on the shaft, the other on the cone.
Shaft (7 digits) - Example: 1234567
This number is unique, like the finger-print, to each racket.
Cone (6 digits + 2 alphabets) - Example: 110562JP
The first 5 digits show the date of manufacture of the racket. In the case of the above example, the racket was manufactured on 11th May, 2006. The meaning of the last digit remains a mystery. The 2 alphabets denotes the Code of Distribution. The Code of Distribution is intended to show the country or the market in which the racket is officially to be sold, or the market group by which the racket is intended for use. In the above example, JP stands for Japan.
Below are some examples of Code of Distribution:
AS = Australia, BX = Belgium / Netherlands, CD = Canada, CH = China, CN / CP = Chinese National Team, DK = Denmark, FR = France, GR = Germany, HK = Hong Kong, ID = India, IN = Indonesia, JP = Japan, KR = Korea, MA = Malaysia, NZ = New Zealand, SD = Sweden, SP = South Pacific, TH = Thailand, TW = Taiwan, UK = United Kingdom, US = USA
To-date, there is no published literature and data from Yonex indicating the differences between rackets of different country codes.