MAXX Sports - While 'U" is representing the weight class, "G" on the other hand represent the size of the racket grip. If you are unsure which grip size fits you, always
ALP FDYX 4U G4 Wind Hole Design Max 35Lbs Badminton Racket
YONEX Arcsaber Lite G4/G5 Badminton Racket (Red Black)
Badminton Talk on Twitter: "Ukuran grip (setidaknya untuk raket Victor dan Yonex) terbagi menjadi beberapa ukuran: G2, G3, G4, G5, dan (jarang ditemukan) G6. Semakin besar angka setelah "G"-nya, semakin kecil ukurannya.
What are the disadvantages of light weight badminton rackets? - Quora