Signum Pro Thunderstorm 12m String

Signum Pro Thunderstorm: Optimised Control and Cushioned Feel

The Signum Pro Thunderstorm string is a twisted monofilament featuring a unique 10-sided structure. This distinctive design subtly enhances ball bite while significantly optimising the level of control. While offering a global feel very similar to the Signum Pro Tornado, it distinguishes itself with a clear increase in control, albeit with a minor reduction in power.

Stable, Precise, and Cushioned Performance

With its angular twisted profile, the Thunderstorm string promotes excellent trajectory stability, even during high-paced rallies. It generates a notably extended ball-string contact time, delivering a cushioned feel akin to that of the Tornado. This soft touch, combined with controlled energy return, imparts a more "closed" and controllable characteristic to the string, making it ideal for players prioritising precision in their game.

Adequate Ball Bite, Yet Limited Spin Potential

Despite its structured and twisted shape, the Thunderstorm does not excel in spin generation. The snapback remains limited, which prevents the string from unleashing its full potential for grip. Intense topspin players might experience some frustration, but those who favour a flat or slightly brushed shot will appreciate its consistent behaviour and stability upon impact.

On-Court Playtest of the Signum Pro Thunderstorm String

During our on-court testing, the Thunderstorm proved to be very similar to the Tornado in terms of feel, albeit with a slightly stiffer sensation and improved ball containment within the court lines. This gain in control comes at the cost of slightly reduced power, but the compromise remains highly appealing for players who prioritise rigorously constructed points over raw explosiveness. The feel remains pleasant, cushioned, and confidence-inspiring on mid-intensity shots.

In summary, the Signum Pro Thunderstorm is a structured string designed for players who prioritise control and precision, all while maintaining a comfortable feel upon impact.