String comparison
Hyper-G vs Black Code 4S
Solinco Hyper-G against Tecnifibre Black Code 4S: ratings, specs and which one fits your junior.
The short answer
Both are polyester strings. Hyper-G leads on power. Black Code 4S leads on control. They score the same for arm friendliness (2/5). Hyper-G 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 Hyper-G if…
- You want more power (7 vs 5 out of 10)
- Your player is younger (recommended from age 14 vs 15)
- You want to spend less (from $12 vs $14 a set)
- Best for: heavy topspin players
- Best for: advanced juniors with fast, full swings
- Best for: players looking for spin + control at great value
Pick Black Code 4S if…
- You want more control (10 vs 9 out of 10)
- Best for: maximum spin seekers
- Best for: advanced players with full swings
- Best for: control-obsessed baseliners
Specs side by side
| Spec | Hyper-G | Black Code 4S |
|---|---|---|
| Type | Polyester | Polyester |
| Construction | Square-shaped co-polyester monofilament | Square-shaped co-polyester with four spin edges |
| Gauges | 15L, 16, 16L, 17, 18, 19, 20 | 16, 17, 18 |
| Stiffness | Medium high | High |
| Set price | $12–13 | $14–18 |
| Reel price | $165–175 | $150–180 |
| Arm friendliness | 2/5 · Low | 2/5 · Low |
| Cost to maintain | 5/5 | 4/5 |
| Recommended from | Age 14 | Age 15 |
| Levels | Advanced, Elite | Advanced, Elite |
| Play styles | Baseliner, Big hitter | Baseliner, Big hitter |
| Junior tension | 46-50 lbs for juniors. Square shape grips well so can string lower for more comfort. | 44-48 lbs for juniors. String low due to stiffness. |
Lab test data
| Test | Hyper-G | Black Code 4S |
|---|---|---|
| Stiffness (lower is softer) | 218 lbs/in | 209 lbs/in |
Sources:
Hyper-G in short
Since 2014, Hyper-G has endured as the top string choice for tennis players around the globe. Developed for an ATP top 50 player, this shaped co-poly with an impressive combination of spin and precision allows big hitters to take massive cuts at the ball without having to worry about overhitting. The square profile with sharp edges bites the ball at contact, generating massive spin. Topspin players who like hitting balls that dive sharply and explode off the court should love this string. With an unmatched selection of 7 gauges from 15L to 20, there's a Hyper-G for every playing style.
Black Code 4S in short
Black Code 4S is Tecnifibre's maximum spin and control polyester with a square shape and four grippy edges. Lab tested stiffness of 209 lb/in makes it quite stiff. "This string's most undeniable characteristic was control" - it enabled playtesters to execute their most powerful strokes without fear of overhitting. The ability to take massive upward cuts combined with the four grippy edges was "a recipe for massive spin." Low powered but provides excellent bite on the ball.
Hyper-G vs Black Code 4S: quick answers
Which has more spin, Hyper-G or Black Code 4S?
They tie on our spin rating (10/10 each).
Which is more arm-friendly for a junior?
They score the same, 2/5. Hyper-G is recommended from age 14 and Black Code 4S from age 15.
Which lasts longer?
They tie on durability (8/10). Tension maintenance: Hyper-G 7/10, Black Code 4S 7/10.
Which is cheaper?
Hyper-G costs about $12–13 a set and Black Code 4S 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 (Hyper-G) and 2025-01 (Black Code 4S).