One of the brand’s most unique co-polys is String Project Rocket, a string that combines accessible spin, comforting feedback, and regulated power into one convenient package. It has a sharp but not punishing feel with enough pop to assist players hit with easy depth, falling somewhere between firm, pro-level control polys and softer daily choices.
Quick verdict
String Project Rocket is a lively, controlled poly that blends accessible power (85%), strong spin (85%), and a clean, crisp feel without excessive stiffness. With moderate tension holding (50%) and solid comfort (70%), it’s a great fit for players who want a string that helps them hit out freely while still keeping the ball on the court.
👉 Ideal for all-court hitters and spin-friendly baseliners who want controllable power and a smooth, predictable response — without the harshness of ultra-stiff polys.
What the lab tests numbers say
Independent lab-style scoring for String Project Rocket below.
String Project Rocket — Indicative Performance Scores
👉 In short: Rocket delivers lively power and solid spin with smooth feel — but tension maintenance is its weakest area, so frequent restringing helps maximise performance.
String Project Rocket – Pros & Cons
String Project Rocket – Here’s a quick pros and cons snapshot for Grapplesnake Soldier:
How it plays (feel, spin, power, control)
String Project Rocket offers a crisp, controlled feel with enough liveliness to make the stringbed feel fast and responsive. The elasticity score (50%) indicates a firmer response, but it avoids harshness thanks to the 70% comfort rating. Players will notice clean ball contact, predictable response, and a slightly springy launch when accelerating through the stroke.
Spin performance is strong. While not as extreme as dedicated spin monsters like Hyper-G or Tour Bite, the 85% spin score ensures Rocket can produce heavy topspin, sharp angles, and kicking serves with good consistency.
Power is one of Rocket’s standout traits. With 85% power and 80% resilience peak, players will find easy baseline depth and penetrating ball speed without sacrificing too much control.
Directional control is solid at 70%. Enough to flatten out through the court, but not as dialled-in as firmer tour polys — ideal for players who want forgiveness with precision.
String Project Rocket Profile
STRING PROJECT ROCKET
Rocket Yellow is a round copolyester monofilament designed for clean control, dependable spin, and a crisp response that stays predictable across longer rally patterns.
Durability & tension maintenance
Rocket performs well during the first 6–8 hours of hitting, retaining good pop, predictable response, and stable spin. However, the 50% scores for stability and tension holding show that the string does begin to lose its crispness earlier than stiffer tour polys.
Snap-back remains functional until notching appears, but for heavy hitters, performance declines faster than elite control strings like Solinco Confidential or Luxilon 4G. See my guide here on choosing the right tennis string tension.
👉 Expect peak playability for around 8–10 hours before noticeable tension drop. More frequent restringing is recommended.
Who it suits
Best For:
- Intermediate & advanced players wanting controllable power
- All-court players needing a fast, lively response
- Spin players who don’t want extreme stiffness
- Anyone looking for a crisp poly with above-average comfort
Not For:
- Beginners or slow swingers
- Players needing maximum control at high swing speeds
- Those who prefer super-soft polys or gut/multi feel
- Players who need long tension stability
Best suited racquets
String Project Rocket works best in racquets that benefit from added power and a livelier, more explosive response.
| Racquet | Why it Works | Recommended Tension |
|---|---|---|
| Babolat Pure Drive / Pure Drive 98 | Adds control and comfort to a powerful frame. | 23–25 kg (51–55 lbs) |
| Yonex Ezone 100 / 98 | Balances the Ezone’s power with clean feel and good spin. | 22–24 kg (48–53 lbs) |
| Wilson Clash 100 | Keeps launch manageable while enhancing response. | 23–25 kg (51–55 lbs) |
| Head Speed MP | Boosts spin and crispness without harshness. | 22–23.5 kg (48–52 lbs) |
Comparable strings
If you like String Project Rocket, you might also consider:
- Luxilon ALU Power Soft — softer response and excellent tension retention with similar spin/control focus.
- Yonex Poly Tour Air — lightweight poly with crisp feel, good for players wanting speed and spin with less stiffness.
- Head Lynx — firmer multi/poly hybrid option that still emphasises control and spin but with a slightly different feel profile.
Practible recommendations
Tension: 22–24 kg for most players; increase to 25 kg for added control
Gauge: 1.25 mm is the ideal balance; thicker gauges for durability
Setup: Full bed recommended; hybrid if you want extra softness
Restringing: Every 8–10 hours of play for consistent performance
I hope this review helped you understand what String Project Rocket is, who it works for, and what to expect from it over time. If you want to know if Rocket (or another string) is right for your game or if you’re ready to book a restring, just send us a message via chat!
