Babolat RPM Blast 17-Gauge Tennis String, Black, 1.25 mm Octagonal Spin Co-Poly

Babolat RPM Blast 17-gauge is a spin-oriented co-polyester tennis string with an octagonal profile that delivers pronounced bite on the ball and a relatively soft feel for polyester strings.

Engineered for players who want aggressive topspin without the harsh feedback of older polyesters, this 1.25 mm monofilament blends durability and stringbed control. Its slick surface encourages the mains to slide, capture the ball and snap back, creating added revolutions while maintaining a forgiving response for power players. Supplied in a standard 12.2 m (40 ft) reel, the RPM Blast 17 is a reliable option for frequent stringers who demand spin, control and a familiar polyester resilience.

How does RPM Blast produce more spin than traditional strings?

The string's octagonal profile increases friction against the ball and the slick coating helps mains move and rebound quickly, creating a snapback effect that generates extra rotation. This mechanical interaction enhances bite without relying on string movement alone.

• Octagonal cross-section increases edge contact with the ball.
• Slick surface encourages strings to slide then snap back for spin.
• Monofilament construction keeps tension stability and control.

What playing feel and control can I expect from a 17-gauge RPM Blast?

At 1.25 mm, the 17-gauge delivers a balance between comfort and precision. It feels softer than many polyester monofilaments, offering a more comfortable impact while still allowing players to shape aggressive shots with predictable control.

• Softer impact than traditional polyester for less harsh feedback.
• Good touch for volleys and short swings while retaining control for big hitters.
• A moderate balance of power and tension maintenance at match tensions.

How durable is the string and what tensions are recommended?

RPM Blast is designed as a durable co-poly that stands up to heavy hitters and aggressive topspin play. It holds up well over time but, like all polys, durability depends on playing style and spin frequency.

• Length: 40 ft (12.2 m) reel suitable for single full racquet or hybrid setups.
• Gauge: 17 / 1.25 mm — balance of bite and lifespan.
• Maximum recommended tension: 66 lbs; adjust lower for more comfort or slightly higher for extra control.

Can RPM Blast be used in a hybrid setup and why choose black?

Yes—RPM Blast works well as mains or crosses in hybrid strings, especially when paired with a softer multifilament or natural gut to improve comfort and power. The black color provides a sleek, low-glare appearance and resists visible staining, keeping the racquet looking cleaner through multiple sessions.

• Common hybrid: RPM Blast mains with multifilament crosses for comfort and spin.
• Black finish offers a professional aesthetic and hides dirt better than lighter colors.
• Monofilament structure simplifies tensioning and stringbed predictability.

Who is this for? Babolat RPM Blast 17 is targeted at club players, tournament competitors and heavy topspiners who want a spin-biased polyester that is slightly more forgiving than older, harsher monos. It suits big-armed baseliners seeking enhanced rotation and control, stringers building hybrids to balance comfort and bite, and anyone preferring a 1.25 mm gauge for its versatile play characteristics. If you string frequently and prioritize spin without sacrificing comfort entirely, RPM Blast 17 in black is a strong match.