Players don't always realise that just because the strings haven't broken it might still need restringing, as strings lose tension over time. The average tension for a racketball racket is 33lbs, however it can be strung tighter for more control or looser for more power. Our most popular racketball restrings are the Tecnifibre 305 1.3 green string or the Head Megablast racketball string, which all Head rackets come pre-strung in.