Babolat RPM Blast 17/1.25

What it is

You take a full cut, the mains slide and snap back, and the ball leaves with dip you can hear—not a round-poly “push,” not mush. That’s classic Babolat RPM Blast: the octagonal co-poly that turned “shaped poly” into a household tennis phrase.

US retail naming (Sep 2026): Tennis Warehouse and Babolat US both sell the set as RPM Blast with gauge selectors. The volume SKU for club players is 17 / 1.25 mm (TW title: Babolat RPM Blast 17/1.25 String). Same family also ships 16 / 1.30, 18 / 1.20, and 15L / 1.35. Composition per TW / Babolat: co-polyester monofilament, octagonal (8-sided) profile, slick / silicone-coated surface for snapback. Classic color: Black (TW Exclusive Orange is the same construction, different dye). Set length 40 ft / 12 m (Babolat lists ~39 ft / 12 m). Made in France. US street for a set: $22.00 (Babolat US and Tennis Warehouse, Sep 2026). Reels if you string a lot: 330′ ~$159, 660′ ~$299 on TW for the 17/1.25 black.

Not RPM Rough, Soft, Power, Team, or Hurricane—this listing is the classic shaped black RPM Blast, focused on the 17/1.25 set most recreational players actually buy.

Who it’s for

Serious recreational and club players (roughly 4.0+) with medium-to-full, low-to-high swings who already generate pace and want a shaped bed that bites and dips. Baseliners on open patterns (Pure Aero, Pure Drive, similar) who value spin margin over ALU-style connected round feel. Players who will restring when the crisp snapback window closes rather than live with a dead poly for months.

Skip it if you’re new to poly, have a short or flat swing, or already nurse an arm—this is a firm co-poly (TW University stiffness ~234 for 17/1.25). Also skip if you want maximum connected “silver string” feel (that’s Luxilon ALU Power) or a cheaper shaped daily driver (Hyper-G-class). Comfort seekers should look at RPM Soft / Team, hybrids with gut or multi, or a softer co-poly—not a full bed of Blast at high tension.

Standout details

• Specs that matter: 17 / 1.25 mm (also 16/1.30, 18/1.20, 15L/1.35) · 40 ft / 12 m set · octagonal co-poly · Black · Made in France
• Spin is the franchise: TW playtest Spin 97 / Control 90 / Overall 85—octagon + slick surface = snapback and heavy ball when you bring racquet-head speed
• Control on full swings: Firm, low-trampoline response—Babolat’s pitch and TW’s “surgical targeting” line both assume you supply the engine
• 17 vs thicker: TW notes the 17g offers slightly more pop and feel than 16g; 15L is the thick durability/control gauge historically tied to Rafa’s retail story
• Lab vs pocket: TW University stiffness ~234 (17/1.25)—stiffer than ALU Power’s ~209 in their head-to-head; playtesters still report usable comfort when hitting with heavy spin (strings slide), harsher on flat / off-center
• Pricing ladder: Set $22; 330′ reel ~$159; 660′ reel ~$299—value improves if you string yourself; street price sits next to ALU, above many Solinco sets
• Tradeoffs: Stiff for arm-sensitive players; tension / playability window is finite; peak spin fades as the bed notches and goes dead; not free power

Who’s hitting it

Rafael Nadal is the string’s origin story in public tennis culture. Babolat still markets RPM Blast with the Rafa line (“Just ask Rafa”), and Tennis Warehouse’s 15L / 1.35 page still calls that thick gauge “Rafael Nadal’s string of choice.” Independent gear write-ups have long described Rafa on a full bed of RPM Blast—commonly 15L / 1.35 around ~55 lbs / 25 kg—after earlier Babolat poly eras (e.g. Pro Hurricane Tour). That is not the retail 17/1.25 set most club players buy, and pros change gauges/tensions over seasons.

Tennis Warehouse’s athlete row on the classic 17/1.25 product page currently lists Arthur Fils, Amanda Anisimova, Alexandra Eala, and Leylah Fernandez. Treat that as TW’s brand association row—not a claim each runs a stock full bed of 1.25 black at your local stringer’s tension.

Carlos Alcaraz is a Babolat athlete on Pure Aero 98; Babolat’s own 2022–23 partnership copy tied him to RPM Blast 16 / 1.30, while later Grand Slam posts (e.g. RG / Wimbledon 2024) credit RPM Team. Do not treat Blast as his current retail twin.

History, not hype: RPM Blast showed up as the black octagon around the 2010 Australian Open era and became the shaped-poly counterweight to Luxilon’s round silver look—TW still frames ALU vs RPM as the Federer/Nadal rivalry of strings. Retail ≠ tour setup. Pros cut out beds constantly and customize gauges, tensions, and (sometimes) hybrids. Why club players still care: if you generate your own pace with a spin-first swing, this is the classic shaped reference string to demo—not a promise that your Pure Aero will play like Rafa’s 15L stick.

Honest verdict

If Court List already covers Solinco Hyper-G and Luxilon ALU Power 125, RPM Blast fills the classic shaped-poly / RPM sibling slot: firmer and more iconic than most daily shaped beds, spin-first versus ALU’s connected round control. String it a bit lower than your multi/gut tension, take full low-to-high cuts, and cut it out when snapback dies. It’s not free power, not plush, and not Rafa’s exact tour gauge—for serious recreational players who already swing with spin and want the black octagon that started the craze, it’s still the shaped string that makes sense.

Updated 2026-09-06