String comparison
RPM Blast vs Razor Code
Babolat RPM Blast against Tecnifibre Razor Code: ratings, specs and which one fits your junior.
The short answer
Both are polyester strings. RPM Blast leads on spin. Razor Code leads on power, comfort, durability and tension hold. For a junior with arm concerns, Razor Code is the safer choice. Razor Code costs less per set.
Ratings
Power
Spin
Control
Comfort
Durability
Tension hold
Ratings are on a 1–10 scale. The higher score is in bold when they differ.
Pick RPM Blast if…
- You want more spin (10 vs 8 out of 10)
- Best for: heavy topspin players
- Best for: advanced juniors with fast, full swings
- Best for: players who generate their own power
Pick Razor Code if…
- You want more power (7 vs 6 out of 10)
- You want more comfort (6 vs 5 out of 10)
- You want more durability (9 vs 7 out of 10)
- You want more tension hold (7 vs 5 out of 10)
- Arm comfort comes first (arm friendliness 3/5 vs 2/5)
- You want to spend less (from $14 vs $20 a set)
- Best for: heavy string breakers (extreme durability)
- Best for: performance players and heavy hitters
- Best for: those with rackets over 300g
Specs side by side
| Spec | RPM Blast | Razor Code |
|---|---|---|
| Type | Polyester | Polyester |
| Construction | Octagonal high-density co-polyester monofilament | High Modulus Polyester Compound with Thermocore technology |
| Gauges | 16, 17, 18 | 16, 17 |
| Stiffness | Medium high | Medium high |
| Set price | $20–21 | $14–18 |
| Reel price | $130–150 | $150–180 |
| Arm friendliness | 2/5 · Low | 3/5 · Moderate |
| Cost to maintain | 3/5 | 4/5 |
| Recommended from | Age 14 | Age 14 |
| Levels | Advanced, Elite | Advanced, Elite |
| Play styles | Baseliner, Big hitter | Baseliner, Big hitter |
| Junior tension | 46-50 lbs for juniors. String lower to unlock spin potential. Loses tension quickly so some players string 2-3 lbs higher. | 48-52 lbs for juniors. Don't go below 22kg (48.5 lbs). |
RPM Blast in short
Babolat RPM Blast is one of the most iconic co-polyester strings ever made. When Rafael Nadal showed up at the 2010 Australian Open with this octagonally shaped co-poly, it changed the game. The octagonal structure with high-density co-polyester adds phenomenal rotation to the ball. The slick surface enables the strings to snap back with vicious force, resulting in extra RPMs. One of the most popular co-polys of all time, this firm and durable string is perfect for big hitters looking to load the ball with pace and spin.
Razor Code in short
Razor Code is the most resistant and hardest to deform string in Tecnifibre's range. The High Modulus Polyester Compound ensures a firm feel and extreme durability, making it the top pick for performance players and heavy hitters. Thermocore technology brings flexibility despite the rigid material by using heating and cooling phases. Playtesters found excellent control (8/10), good feel (7/10), and surprising power for a 16 gauge co-poly. The Blue version is softer than White with a little more pop. Recommended for rackets over 300g.
RPM Blast vs Razor Code: quick answers
Which has more spin, RPM Blast or Razor Code?
Babolat RPM Blast, with a spin rating of 10/10 against 8/10.
Which is more arm-friendly for a junior?
Tecnifibre Razor Code scores 3/5 for arm friendliness, against 2/5 for RPM Blast. It is recommended from age 14.
Which lasts longer?
Tecnifibre Razor Code rates 9/10 for durability against 7/10.
Which is cheaper?
RPM Blast costs about $20–21 a set and Razor Code about $14–18, at typical retail.
The short answer and the "pick if" lists are generated from our ratings and junior data only. Data verified 2025-01 (RPM Blast) and 2025-01 (Razor Code).