String comparison
RPM Blast vs Hyper-G
Babolat RPM Blast against Solinco Hyper-G: ratings, specs and which one fits your junior.
The short answer
Both are polyester strings. Hyper-G leads on power, durability and tension hold. 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 RPM Blast if…
- Best for: players who generate their own power
- Best for: western/semi-western grip users
Pick Hyper-G if…
- You want more power (7 vs 6 out of 10)
- You want more durability (8 vs 7 out of 10)
- You want more tension hold (7 vs 5 out of 10)
- You want to spend less (from $12 vs $20 a set)
- Best for: players looking for spin + control at great value
- Best for: big hitters who need to keep balls in
Specs side by side
| Spec | RPM Blast | Hyper-G |
|---|---|---|
| Type | Polyester | Polyester |
| Construction | Octagonal high-density co-polyester monofilament | Square-shaped co-polyester monofilament |
| Gauges | 16, 17, 18 | 15L, 16, 16L, 17, 18, 19, 20 |
| Stiffness | Medium high | Medium high |
| Set price | $20–21 | $12–13 |
| Reel price | $130–150 | $165–175 |
| Arm friendliness | 2/5 · Low | 2/5 · Low |
| Cost to maintain | 3/5 | 5/5 |
| 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. | 46-50 lbs for juniors. Square shape grips well so can string lower for more comfort. |
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.
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.
RPM Blast vs Hyper-G: quick answers
Which has more spin, RPM Blast or Hyper-G?
They tie on our spin rating (10/10 each).
Which is more arm-friendly for a junior?
They score the same, 2/5. RPM Blast is recommended from age 14 and Hyper-G from age 14.
Which lasts longer?
Solinco Hyper-G rates 8/10 for durability against 7/10.
Which is cheaper?
RPM Blast costs about $20–21 a set and Hyper-G about $12–13, 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 (Hyper-G).