For Roger Federer's last year on tour, he needed a tennis racket that would help him compete with the new generation of heavy baseliners while maintaining his all-court style. The Wilson RF 01 is inspired by that racket. It's lighter than the RF 01 Pro, making it a more maneuverable version. It features the same SABR Frame Design that gives it versatility, allowing for the pace, spin and direction changes signature to Roger's game. You'll notice a fast head speed thanks to Glide Guard B&G and a great ball-pocketing feel from Braid 45 Technology. Braid 45 for enhanced pocketing feel combined with incredible stability SABR Frame Design allowing for pace, spin, and direction changes Feel Fill to optimize vibration dampening authentic to RF Glide Guard for reduced air resistance and faster racket head speed Head (sq cm): 632 Head (sq in): 98 Length (cm): 68.58 Length (in): 27 String Pattern: 16 X 19 Strung balance (cm): 32.5 Strung balance (pts): -6 Strung weight (grams): 315 Strung weight (ounces): 11.11 Taper System (mm): 23-24-22 Unstrung balance (cm): 31.5 Unstrung balance (pts): -9 Unstrung weight (grams): 300 Unstrung weight (ounces): 10.58