Polyester $9–12 / set
Power
7
Spin
8
Control
8
Comfort
5
Arm friendliness 2 of 5 Arm 13+ yrs
String brand
Signum Pro strings
5 Signum Pro strings rated for junior players: polyester. Germany, since 1995.
Strings reviewed5Polyester
Price per set$8–15USD, typical retail
Arm-friendly0Score 4 or 5 of 5
Youngest age12+Lowest recommended age
About Signum Pro
Signum Pro is an internationally operating German tennis company known for high-quality strings with excellent price-performance ratio. All monofilament strings are made in Germany with several unique in-house developed designs. Poly Plasma was one of the first colored co-polyester strings and was voted String of the Year 2004 by Tennis Magazin Germany. Hextreme was one of the first shaped strings with its hexagonal profile. Notable players include former ATP top-10 Mikhail Youzhny, Sergiy Stakhovsky, and Matteo Berrettini who rose into the ATP top 10 using Signum Pro Firestorm.
- Poly Plasma - voted String of the Year 2004, exceptional tension maintenance
- Hyperion - power series with optimized molecular structure
- First colored co-poly and first hexagonal shaped strings
- Used by Matteo Berrettini, Mikhail Youzhny
Brand facts verified 2025-01. Official site: signum-pro.com.
Every Signum Pro string we cover
Polyester $10–13 / set
Power
8
Spin
7
Control
7
Comfort
6
Arm friendliness 3 of 5 Arm 12+ yrs
Polyester $10–13 / set
Power
6
Spin
9
Control
8
Comfort
5
Arm friendliness 2 of 5 Arm 13+ yrs
Polyester $8–11 / set
Power
6
Spin
7
Control
9
Comfort
6
Arm friendliness 3 of 5 Arm 12+ yrs
Polyester $15–15 / set
Signum Pro
Tornado
Heptagonal (7-sided) co-polyester with an axial twist, extruded, cooled, then reheated and twisted
Power
6
Spin
9
Control
8
Comfort
5
Arm friendliness 2 of 5 Arm 14+ yrs
At a glance
| String | Type | Power | Spin | Control | Comfort | Durability | Arm | Set price |
|---|---|---|---|---|---|---|---|---|
| Firestorm | Polyester | 7 | 8 | 8 | 5 | 8 | 2/5 | $9–12 |
| Hyperion | Polyester | 8 | 7 | 7 | 6 | 7 | 3/5 | $10–13 |
| Plasma HEXtreme | Polyester | 6 | 9 | 8 | 5 | 7 | 2/5 | $10–13 |
| Poly Plasma | Polyester | 6 | 7 | 9 | 6 | 8 | 3/5 | $8–11 |
| Tornado | Polyester | 6 | 9 | 8 | 5 | 6 | 2/5 | $15–15 |
Ratings are on a 1–10 scale; arm friendliness on a 1–5 scale.
Signum Pro head to head
- Babolat RPM Blast vs Signum Pro Firestorm
- Babolat RPM Blast vs Signum Pro Hyperion
- Babolat RPM Blast vs Signum Pro Plasma HEXtreme
- Kirschbaum Super Smash Orange vs Signum Pro Poly Plasma
- Luxilon ALU Power vs Signum Pro Firestorm
- Luxilon ALU Power vs Signum Pro Poly Plasma
- Prince Tour XP vs Signum Pro Poly Plasma
- Prince Vortex vs Signum Pro Plasma HEXtreme
- Signum Pro Firestorm vs Solinco Tour Bite
- Signum Pro Hyperion vs Solinco Confidential
- Signum Pro Hyperion vs Wilson Revolve
- Signum Pro Plasma HEXtreme vs Signum Pro Tornado
- Signum Pro Plasma HEXtreme vs Solinco Hyper-G
- Signum Pro Plasma HEXtreme vs Volkl Cyclone
- Signum Pro Poly Plasma vs Solinco Tour Bite
- Signum Pro Tornado vs Solinco Tour Bite
- Signum Pro Tornado vs Volkl V-Square
Signum Pro strings: quick answers
What is the most arm-friendly Signum Pro string?
In our database it is Signum Pro Hyperion, with an arm-friendliness score of 3/5 and comfort 6/10. No Signum Pro string scores 4 or more, so see our arm-friendly list for softer options.
Which Signum Pro string has the most spin?
Signum Pro Plasma HEXtreme, with a spin rating of 9/10 and control 8/10. It is recommended from age 13.
How much do Signum Pro strings cost?
Typical retail for a single set runs from $8 to $15 across the 5 Signum Pro strings we cover. Reels lower the cost per restring.
Are Signum Pro strings good for juniors?
It depends on the string. The youngest recommended age across Signum Pro's range is 12. Check each string's minimum age, arm score and junior tension advice before you buy.