Originally Posted by tennisnut123
Even more so that a polyester? If the spin is mainly from the ball hitting the strings, moving the mains and the mains resetting back into their position, wouldn't that imply some stretching of the mains? I would think that a main string can only shift so much before it starts to stretch, and the more it stretched then reset the more spin it would get. Im probably thinking of this in a completely wrong manner but I would think the Polys have a greater stretchability than the kevlar right?
Polyester isn't even close. You are assuming the snapping back of the mains puts spin on the ball. Nothing puts as much spin on the ball as a hard court does and there is no movement in the court at all.