Improve Your Tennis
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magic
Comfort of the multi and performances of a mono.
rocket
Power and spin, no compromise.
armour
An evolution in terms of perception and ball's control.
hexa pro
Conceived to support more complex rotations.
armour soft
Modern and tech, designed to offer high performance.
sirius
For an unbeatable experience and top-level performance.
keen
A concentrate of technology, incredibly strong and responsive.
gold
The innovation of multifilament.
Tennis Strings
Tennis Players
Partners
Sustainability
String Project Sirius is a monofilament tennis string that promises high-level performance and an exceptional playing experience.
It has been developed using next-generation materials and advanced production processes to guarantee maximum performance.
String Project Sirius is the epitome of versatility. On court, it stands out for a remarkable synergy between spin (9.5/10), power (9/10), and exceptional control (9.5/10).
This harmony of characteristics allows players to express their style at best, adapting to different playing situations with confidence and precision.
Thanks to its intrinsic Arm Friendly technology, Sirius is designed to offer a high level of comfort (8/10) during every rally.
This crucial characteristic allows you to focus on performance without the risk of tiring the arm, even in the most intense and prolonged playing sessions.
One of the distinctive strengths of Sirius is its exceptional tension maintenance (8/10). This quality ensures that the string keeps its optimal playing characteristics for a long period, offering consistent performance over time. You can rely on Sirius' predictable and reliable response shot after shot.
Regardless of your playing style or court preferences, String Project Sirius is a string capable of meeting your needs. Its unique combination of controllable power, effective spin, and protective comfort makes it an ideal choice for a wide range of players, from competitors to demanding amateurs.
Circular
1.25 (16L) | 1.30 (16)
225 g/mm
17 / 23 Kg
Parameters detected in lab through tests performed by Pro-t-one property of engineer G. Medri.
Download the PDFs of the laboratory tests:
This technology allows molecules' chains to twitch several times resulting a loss of minimal tension and, above all, keeping a higher feature's steadiness.
Thanks to the pre-stretch of the core, the entire string minimizes the loss of strain and, at the same time, it allows to reduce the stringing tension.
"Heating treatments" remove internal stress and align string's potential irregularities. Moreover, they make strings more flexible and elastic.
The string is perfected with a wax layer. This treatment extends the duration substantially reducing the wear and making stringing easier.
String's Friction's decrease offers: diminished strings' motion, greater potential spin due to greater snap back and a lasting duration.
about 17 stringings
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choose the calibre:
6 stringings
3 stringings
1 stringing
Blogs
tennisnerd.net
This was a very enjoyable string to string. The wax coating and round profile help the string move easily through fingers and grommets. My first hit was in a Wilson Blade 98 V8 18/20. The string felt soft to me (like most String Project strings) and I wanted to maintain control, so I went for 53 lbs or 24 kg.
The String Project Sirius Monofilament Tennis String is used by ATP player Stefano Travaglia.