Solinco Mach-10 Tennis Restring

Solinco Mach-10 is Solinco's most technologically advanced polyester string to date. Developed over four years - originally trialled as '10jx' and 'Confidential 4.0' - it features a five-sided pentagonal profile for extra spin bite and a low-friction surface for fast snapback. Its headline innovation is CloudFORM - a unique chemical agent baked into the string that softens the feel without the usual trade-off in playability duration or tension maintenance.

CloudFORM is Solinco's proprietary chemical treatment embedded throughout the Mach-10 string. It reduces the stiffness of the polyester core, giving the string a softer, more cushioned feel at impact. Crucially, unlike most softening methods, CloudFORM does not noticeably shorten the string's lifespan or cause it to lose tension quickly - one of the key criticisms of other comfort-oriented polys.

Mach-10 is ideal for intermediate to advanced players who want the control and spin of a polyester string but find firmer polys too harsh on the arm. It suits aggressive baseliners who generate their own pace and hit with heavy topspin, players transitioning from multifilaments to poly, and those with arm sensitivities who have struggled with stiffer strings like Tour Bite or Confidential. It is not recommended for beginners or players who require the absolute maximum comfort of a full multifilament.

Spin is one of Mach-10's strongest attributes. The pentagonal (five-sided) cross-section grips the ball on contact and the low-friction surface enables fast snapback - the movement that generates topspin. Reviewers consistently rate its spin potential highly, with independent lab testing scoring it around 90% for spin. While it may not quite match the raw RPM generation of Tour Bite's sharper edges, it offers an excellent balance of spin and comfort that most players find very rewarding.

Yes - Mach-10 is noticeably more powerful than Solinco's traditional control polys such as Tour Bite, Hyper-G Soft, and Confidential. The softer core produces a livelier, more explosive response off the stringbed, delivering easier depth and pace with less effort. Playtesters note this can feel surprising at first - many recommend stringing Mach-10 a couple of pounds tighter than your usual tension to dial in control without losing the comfort benefit.

Mach-10 and Tour Bite are built for different priorities. Tour Bite is firmer, offers sharper edge-on bite and maximum control - the choice for experienced players who want precision above all else. Mach-10 is softer and more powerful, with better arm comfort and similar - though slightly less aggressive - spin. If you love Tour Bite's spin but find it too firm or hard on your arm, Mach-10 is the natural next step.

Both strings lean toward comfort relative to Solinco's firmer offerings, but they play quite differently. Hyper-G Soft is crisper with a firmer response and slightly more consistent spin for players who hit very flat. Mach-10 pockets the ball more deeply, produces more free power, and holds tension better than Hyper-G Soft over time. Players moving from Hyper-G Soft to Mach-10 typically string it 2-4 lbs higher to compensate for the added power.

We offer Mach-10 in 1.25mm (16L) - the most popular all-round gauge and the sweet spot for most players. It strikes the right balance between durability and control for bigger hitters, while still offering the spin bite and comfort that makes Mach-10 stand out. Thinner gauges (1.15-1.20mm) offer more power and feel but break faster, while the thicker 1.30mm suits players who snap strings regularly and prioritise longevity.

Start in the middle of your racquet's recommended tension range. Because Mach-10 plays livelier than most polys, many players find they need to string it 2-3 lbs tighter than their usual setup to achieve their preferred level of control. Players prioritising comfort can go 2-3 lbs lower. The string tolerates tension adjustments well due to its stable CloudFORM core.

Mach-10 offers impressive tension maintenance for a comfort-oriented poly - better than Hyper-G Soft and Tour Bite Soft. For frequent players (3+ times per week), restringing every 2-3 weeks is recommended to maintain peak performance. Casual players can extend this to 4-6 weeks. As the string softens over time, power and pocketing will gradually decrease - which is the clearest signal it's time for a fresh restring.

Mach-10 is one of the more arm-friendly polyester options available, and significantly more comfortable than Solinco's firmer strings like Tour Bite. The CloudFORM construction reduces shock and vibration at impact. That said, if you are suffering from tennis elbow or a serious arm injury, a full multifilament or natural gut string remains a safer choice. For players with mild arm sensitivity who still want the performance benefits of poly, Mach-10 strung at a lower tension is a strong option worth trying.

Yes - Mach-10 works very well in a hybrid. Using it as the main string paired with a soft multifilament cross boosts comfort further and adds a touch more feel and control. Alternatively, pairing Mach-10 mains with Hyper-G Soft crosses is a popular combination that blends the power and softness of Mach-10 with the added spin and crispness of Hyper-G. Hybrid setups are a great way to fine-tune the playability for your specific needs.