For 2009, Yonex Tennis introduces three new racquets in the RDiS line: the RDiS 100 (93 & 98 square inch head sizes) and the RDiS 300. The "iS" in RDiS stands for Impact Speed - a snap-back action that stores energy on impact, then releases it with tremendous power and speed. Yonex also utilizes a new graphite construction known as Cup-Stack Carbon Nanotube in its RDiS tennis racquets, which helps the frame flex, yet provides quick repulsion for power and a solid feel. The RQiS series continues the use of Elastic Ti in the shaft of the tennis racquet, which overcomes the limitations of conventional frame materials. With its powerful rebound effect, a split second after impact and deflection, the Elastic Ti frame snaps back to its original shape with high accuracy and with the full energy of the swing.
