Babolat RPM Power 12m Tennis String - Electric Blue

Every string in the RPM range does something specific. The RPM Power does something the others don't - it prioritises explosive ball speed without abandoning the spin and control the RPM name stands for.

At its core is Babolat's CoPET-C co-polyester construction, engineered through a unique factory extrusion process that produces unprecedented power output for a monofilament string. Unlike the octagonal RPM Blast or RPM Team, the RPM Power uses a round profile, which reduces friction between mains and crosses and lets the string bed pocket the ball more deeply on impact. That deeper pocketing translates into a longer dwell time and a more explosive launch off the string bed — the mechanism behind the added power this string delivers over the rest of the RPM lineup.

A special high-friction outer coating works alongside the round construction to increase snapback speed - the rate at which the string returns to its original position after contact. Faster snapback adds spin and gives the string its signature crisp, connected feel at impact. The sound is clean and distinct, which gives players immediate feedback on how well they are striking the ball.

Comfort is where RPM Power genuinely differentiates itself from the broader polyester category. The CoPET-C formula makes it one of the softest and most arm-friendly co-polys available, with a feel that has been compared to a firm multifilament rather than a conventional stiff poly. For players who want genuine polyester control and durability without the harsh, boardy response that stiffer monofilaments produce, the RPM Power is a practical answer. Tension maintenance is above average, with the string holding playability well across sessions before the characteristic poly drop-off begins.

Developed in close collaboration with Dominic Thiem, who adopted the RPM Power as his string of choice and went on to win his first Grand Slam using it. Babolat recommends RPM Power specifically for advanced players seeking power within the RPM range.

Available in 1.20mm, 1.25mm and 1.30mm gauges. The 1.20mm maximises feel and bite for players who restring frequently. The 1.25mm is the most popular choice, offering the best balance of power, spin and durability. The 1.30mm adds extra longevity for heavy hitters who break strings regularly. Colours: Electric Brown (Bronze) and Blue. Sold as a 12m / 39ft single-racquet set.