Tru Pro Ghost Wire Review: The Softest Co-Poly You Can Buy and How to Use It

There's a number that tells you almost everything you need to know about Tru Pro Ghost Wire: 188. That's its USRSA stiffness rating — and for a polyester string, it's remarkable. For context, Yonex PolyTour Spin sits at 212. Luxilon Alu Power is 242. Babolat RPM Blast is 273. Solinco Hyper-G comes in at 290. Ghost Wire, at 188, is softer than most multifilaments masquerading as polys — yet it's a genuine co-polymer with poly-level durability and tension maintenance. That combination doesn't come around often, and it's what makes Ghost Wire worth paying attention to.

Tru Pro designed Ghost Wire primarily as a cross string for hybrid setups — it's in the crosses of their own pre-built hybrid, Firewire Boost. But it also works as a full-bed string for the right player. Understanding why requires looking at what makes this string different at a construction level, not just how soft it happens to feel.

Why Ghost Wire Is Designed as a Cross String

Ghost Wire has a round profile with a slick coating. Both of those things matter, and they work together in a specific way when Ghost Wire sits in the crosses.

In any hybrid setup, the cross strings have two jobs. First, they need to hold the mains in a stable grid — give them a surface to glide across and snap back from. Second, they need to not wreck the mains. Shaped polys with aggressive edges (hex, octagonal, heptagonal) are brutal to their neighbouring strings. Those edges create friction, heat, and notching at the contact points. In a hybrid where the mains are natural gut or a premium shaped poly, you don't want a harsh cross destroying your expensive mains from the inside.

Ghost Wire's round profile means no sharp edges. It's smooth against the mains, which reduces notching and keeps the mains sliding freely for longer. The slick coating compounds this: it reduces the coefficient of friction between strings, which directly enables snapback. When mains can slide freely across the crosses and snap back into position at contact, you get topspin — even from strings that don't have aggressive ball-bite from their shape. The snapback is the spin mechanism, and Ghost Wire's crosses facilitate it without getting in the way.

That's the physics. In practice, what this means is that a shaped, grippy poly in the mains paired with Ghost Wire crosses can produce meaningful spin because the mains are moving freely and snapping back cleanly, while the Ghost Wire keeps the whole setup comfortable because of that 188 stiffness rating.

Ghost Wire in Hybrid Setups: Which Mains Work Best

The cleanest use case is Ghost Wire crosses with a shaped poly main. Tru Pro's own Firewire or Pure Rush in the mains give you the ball-bite from their shaped profile while Ghost Wire in the crosses supplies both snap-back facilitation and comfort. This is essentially what Firewire Boost is — Tru Pro have done the pairing for you, pre-packaged as a single set. For club players who've been curious about hybrids but don't want to buy two sets and figure out the stringing themselves, Firewire Boost is the obvious starting point.

The other compelling pairing is natural gut mains with Ghost Wire crosses. This is a classic tour hybrid formula — natural gut gives you unmatched feel and power, while the poly cross adds durability and control. The traditional concern with gut/poly hybrids is that a firm poly cross can make the setup feel harder than it looks on paper. Ghost Wire largely sidesteps that concern. At 188 stiffness, it's not going to undermine the comfort of natural gut in the mains. And compared to using a multifilament cross (the alternative for players who want to protect their arm alongside gut), Ghost Wire brings better durability and slightly more control without taking away much feel. I'd expect the natural gut/Ghost Wire combination to suit players with arm sensitivity who still want poly-level longevity in the crosses.

Tennisnerd's overview of the Tru Pro range notes that community feedback on Ghost Wire specifically mentions it "holds tension EXTREMELY well for a polyester string" and is described as "not racquet or tension sensitive." That second point is worth pausing on. A lot of polys have strong opinions about the frames they go in — they want a certain flex, a certain pattern. Ghost Wire apparently doesn't have those requirements, which makes it flexible across setups.

Ghost Wire as a Full-Bed String

I tried Ghost Wire 16g full-bed in my Head Gravity Tour (2025) at 50 lbs. The Gravity Tour has an RA of 59, which is on the flexible end — a frame that handles firm polys gracefully. I wanted to test Ghost Wire without the hybrid variable to understand what it does on its own.

Honest answer: as a full-bed string, Ghost Wire plays extremely soft for a polyester. That 188 stiffness number isn't just a lab stat — you feel it immediately. There's real pocketing, genuine dwell time, and a comfort level that's unusual for a co-poly. On off-centre hits and during long groundstroke rallies, the arm doesn't take a beating. If you've been playing with something firm — a Tour Bite, an RPM Blast — and you switch to Ghost Wire full-bed, the contrast is significant.

The honest caveat: spin. As a full-bed string, Ghost Wire doesn't spin like a shaped poly. The slick coating helps the mains slide across each other and generate snapback, but there are no edges biting into the ball. My game is built around taking the ball early and going for depth — I don't need maximum topspin and I'm not a loopy baseliners who wants to throw the ball high over the net. For me, Ghost Wire full-bed worked reasonably well: it gave me crisp-enough response for my timing on the rise, reasonable control, and comfort that made long sessions easier. But the launch angle is lower and the spin production is noticeably less than what I'd get from any shaped poly at the same stiffness range.

If you're a heavy topspin player who relies on the ball dipping sharply, Ghost Wire full-bed isn't going to replace a Hyper-G or a Tour Bite. It's not trying to. The full-bed use case for Ghost Wire is the arm-sensitive player who wants poly durability and tension maintenance — and is willing to trade some spin for that. That's a real, underserved category, and Ghost Wire fills it better than most.

On the USRSA tension maintenance test, Ghost Wire lost 16.27 lbs — in line with comparable polys. It's not exceptional there, but it's not concerning either. The community reports of it holding tension well likely reflect what happens after the initial break-in period: once it settles, it stabilises. I'd still recommend giving it a session to bed in before drawing firm conclusions about how it plays.

Gauge Choice for Ghost Wire

Ghost Wire is available in multiple gauges through The Tennis Store's Tru Pro collection, with 16g (1.27mm) as the standard tested gauge and 19g available as an ultra-thin option.

For cross string use in a hybrid, thinner is generally better — 19g in the crosses will feel softer, move more freely across the mains, and give even better snapback facilitation. The trade-off is durability: a 19g cross will notch and break faster than a 16g, particularly if the mains are an aggressive shaped poly. For most recreational club players who aren't breaking strings every two weeks, that's probably fine. But if you're a string breaker or you're pairing it with a particularly sharp-edged main, stick to 16g.

For full-bed use, 16g is the practical choice. The 19g will feel plush and forgiving but won't last long if you're hitting with any pace. 16g gives you a better balance of comfort and longevity for a full-bed setup.

Tension and Setup Notes for Ghost Wire

The Tennisnerd community note that Ghost Wire is "not tension sensitive" suggests it's forgiving across a reasonable range — you don't need to find a very specific sweet spot for it to play well. That said, as with most polys, I'd recommend stringing it 10% lower than your normal synthetic gut tension. If you'd usually string a multi at 54 lbs, think about 48–50 lbs for Ghost Wire.

For hybrid use specifically, standard practice is to string crosses 2 lbs higher than mains. With Ghost Wire in the crosses at 188 stiffness, you might find you don't need to follow that as rigidly — the string is already very soft, so there's less risk of the crosses being uncomfortably firm relative to the mains. I'd suggest starting level with your mains tension on the first string and adjusting from there.

On the Pure Aero 98 (2026) — a stiffer frame at RA 66 — Ghost Wire in the crosses is a genuinely interesting option if you're running a shaped poly in the mains. The frame's stiffness combined with a firm shaped poly can get harsh over a long session. Ghost Wire at 188 in the crosses softens that combination without muddying the control the shaped main provides. I haven't tried the specific combination yet, but the spec math is compelling.

Ghost Wire is available now at The Tennis Store with shipping across Australia. If you're already curious about the hybrid setup but want to skip the two-set maths, Firewire Boost is worth looking at first — it's Tru Pro's pre-matched version with Ghost Wire in the crosses.

Tru Pro Ghost Wire FAQ

Is Tru Pro Ghost Wire good for tennis elbow or arm sensitivity?

It's among the better options in the co-poly category. The USRSA stiffness rating of 188 puts it in the range of many multifilaments despite being a polyester — which means significantly less arm stress than most polys. Full-bed, it's a reasonable choice for players with arm sensitivity who want poly durability. In a hybrid with natural gut mains, it's one of the more arm-friendly setups you can build. It won't match pure multifilament or natural gut for comfort, but as a cross string it imposes very little harshness.

What tension should I string Ghost Wire at?

Community reports suggest Ghost Wire is forgiving across tensions, so there's no single target. As a general rule, start 10% below what you'd use for a synthetic gut — roughly 48–52 lbs for most players who'd normally string in the low-to-mid 50s. For hybrid use in the crosses, try starting at the same tension as your mains and adjust. The string reportedly settles and stabilises well after the initial session.

What gauge should I use for Ghost Wire?

16g (1.27mm) for most setups — it's the standard option and the gauge the USRSA data is based on. If you're using Ghost Wire specifically as a cross string in a hybrid and want maximum softness and snapback facilitation, 19g is an option but comes at the cost of durability. Full-bed: stick to 16g.

Is Ghost Wire good as a full-bed string or is it only a cross string?

Both work, but they suit different players. As a cross string in a hybrid, Ghost Wire does something specific and does it well — it facilitates mains snapback via its slick coating, protects mains from notching via its round profile, and keeps the setup comfortable. As a full-bed string, it's very arm-friendly and durable but won't produce the spin of a shaped poly. Full-bed Ghost Wire suits the arm-sensitive player who wants poly characteristics without poly harshness — not the spin-chaser who needs aggressive bite from a shaped string.

What is Firewire Boost, and how does Ghost Wire fit into it?

Firewire Boost is Tru Pro's pre-configured hybrid string set. It puts their shaped Firewire poly in the mains and Ghost Wire in the crosses. It's designed to deliver the spin and ball-bite of a shaped main with the comfort and snapback facilitation that Ghost Wire's slick, round crosses provide. For players who want to try a hybrid without buying two separate sets, Firewire Boost is a clean starting point — Tru Pro have already made the pairing decision for you.

How does Ghost Wire compare to Luxilon Alu Power as a round poly?

Different animals, despite both being round. Alu Power's USRSA stiffness is 242 vs Ghost Wire's 188 — Ghost Wire is meaningfully softer. Alu Power is known for its muted, "connected" feel and controlled, penetrating ball flight; it's the benchmark round poly. Ghost Wire isn't trying to replicate that — it's optimised for cross string use specifically, with a slick coating that prioritises inter-string friction reduction. Where Alu Power is equally valid as a full-bed string and a hybrid option, Ghost Wire is more purpose-built for the cross. The stiffness difference also means Ghost Wire is noticeably more arm-friendly at equivalent tensions.