TIBHAR Rubber Nimbus Sound – the best possible symbiosis of sound and spin The performance-enhancing effect of fresh adhesion is composed of the features of feel, sound, spin and speed. The Nimbus Sound features the feel and sound are primarily highlighted by SPI technology. The surface with its extremely soft sponge describes the best possible symbiosis of spin and sound at good tempowers and gives the player incredible variability. The fresh adhesive effect is already built-in thanks to the SPI technology, i.e. the coating no longer requires fresh glue.