Shaft Flexibility ( Flex )

Apacs measuring FLEX of a racket by 2 supports at the handle and T-joint. Applying a 20Kg weight at the middle of the shaft. The bent lenght of the shaft will be the index of FLEX. Therefore, the bigger the number, more flexible will be the shaft. In general, number will between 6.5.0mm - 9.5mm.

<7.0mm	Xtra Stiff
7.0 - 8.0mm	Stiff
8.0-9.0mm	Medium
>9.0mm	Flexible

Grip Size

Grip size reference table

Apacs	Yonex
G1	G5
G2	G4
G3	G3
G4	G2
G1	G5

All Apacs rackets are come in G2 only for the moment.