String comparison
4G vs Razor Code
Luxilon 4G against Tecnifibre Razor Code: ratings, specs and which one fits your junior.
The short answer
Both are polyester strings. 4G leads on tension hold. Razor Code leads on power and comfort. 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 4G if…
- You want more tension hold (10 vs 7 out of 10)
- Best for: control-oriented advanced juniors
- Best for: players who hate restringing frequently
- Best for: players who value precision over 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)
- Arm comfort comes first (arm friendliness 3/5 vs 2/5)
- You want to spend less (from $14 vs $21 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 | 4G | Razor Code |
|---|---|---|
| Type | Polyester | Polyester |
| Construction | Co-polyester monofilament with poly-ether-ether compound | High Modulus Polyester Compound with Thermocore technology |
| Gauges | 16, 16L | 16, 17 |
| Stiffness | High | Medium high |
| Set price | $21–22 | $14–18 |
| Reel price | $170–200 | $150–180 |
| Arm friendliness | 2/5 · Low | 3/5 · Moderate |
| Cost to maintain | 4/5 | 4/5 |
| Recommended from | Age 14 | Age 14 |
| Levels | Advanced, Elite | Advanced, Elite |
| Play styles | Baseliner, All court | Baseliner, Big hitter |
| Junior tension | 48-52 lbs for juniors. Better tension maintenance means more consistent feel over time. | 48-52 lbs for juniors. Don't go below 22kg (48.5 lbs). |
4G in short
Luxilon 4G was designed with one goal: better tension maintenance than ALU Power. Made with Luxilon's magical poly-ether-ether compound, 4G strings feature best-in-class durability, control and tension maintenance. Unlike many polys that go dead after 8-10 hours, 4G keeps its feel and control far longer. Its tension holding score of 100% isn't marketing hype - it's backed up by lab data. Control is where 4G shines, making it a workhorse that's reliable, consistent, and built for precision.
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.
4G vs Razor Code: quick answers
Which has more spin, 4G or Razor Code?
They tie on our spin rating (8/10 each).
Which is more arm-friendly for a junior?
Tecnifibre Razor Code scores 3/5 for arm friendliness, against 2/5 for 4G. It is recommended from age 14.
Which lasts longer?
They tie on durability (9/10). Tension maintenance: 4G 10/10, Razor Code 7/10.
Which is cheaper?
4G costs about $21–22 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 (4G) and 2025-01 (Razor Code).