String Tips #6 - Does lowering the tension of the cross strings give more effect?
This is a question many players ask, and the answer is yes. But to understand why, you first need to know where the effect actually comes from.
The effect comes from the amounts.
The spin isn't produced by the crosses, but by the mains: the vertical strings of your racket face. And it all comes down to a phenomenon called snapback . At impact, the ball shifts the mains sideways, then they spring back to their original position. This return to their original position is the snapback : the true engine of spin.
Take, for example, the Black Code or the Razor Spin , designed for generating spin. These strings are designed to make the most of this snapback : combined with lower tension in the mains, they free up string movement and enhance your access to topspin.
Less tension, a faster snapback
This is where cross tension comes into play. The less tension your crosses have, the less they restrain the mains, and the faster the snapback . And the faster the snapback , the more revolutions per minute (RPM) you produce. In other words: loosening your crosses a little frees up the movement of the mains and directly increases spin.

➤ Tecnifibre's tip : To maximize the effect, string your crosses slightly less tightly than your mains. This speeds up the snapback and increases spin, without changing anything else in your setup.