Head to head

Signum Pro Tornado 18 (1.17) vs Volkl V-Torque 18 (1.18)

They split the measurements 3–3. The widest gap is string friction, where V-Torque 18 (1.18) is 19 percentile points ahead. Every figure is a testing-machine result at a fixed reference tension.

Measured, side by side

Signum Pro

Tornado 18 (1.17)

Polyester · 18 ga

Volkl

V-Torque 18 (1.18)

Polyester · 18 ga

Stiffness lower = softer, kinder on the arm
16736th pct
15721st pct
Tension loss lower = stays where you strung it
3966th pct
4678th pct
Energy return higher = livelier, more free power
8629th pct
8626th pct
Spin potential higher = more spin off the string bed
5.978th pct
6.079th pct
Ball bite higher = grabs the ball harder
0.54690th pct
0.50279th pct
String friction lower = strings slide and snap back
0.09250th pct
0.08331st pct

Bars are percentile against all 791 strings, and the marked side is the one that measures better, which is not always the one you want. A firmer bed is worse for your elbow and better for your control, and no measurement knows which of those you came for.

Which one wins, by problem

Each string's standing on the site's rankings, out of every measured string in the database. This is where a comparison stops being arithmetic and starts being a decision.

Swapping between them: what tension?

Bed stiffness is published at one reference tension, so the only honest conversion is to scale it. These are starting points from 52 lb, not prescriptions. The calculator takes your own tension.

Coming from Tornado 18 (1.17) at 52 lb

String V-Torque 18 (1.18) at 55.4 lb 25.1 kg

Coming from V-Torque 18 (1.18) at 52 lb

String Tornado 18 (1.17) at 48.8 lb 22.1 kg

Hybrid: what if you used both?

Estimated, not measured. No hybrid combination has been tested as a bed. These figures are the two strings' own lab measurements weighted by how much of the bed each one actually is. Treat them as a guide to which way a pairing moves, never as lab data.

Tornado 18 (1.17) mains / V-Torque 18 (1.18) crosses

Stiffness30th pct · 1 measured
Tension loss69th pct · 1 measured
Energy return28th pct · 1 measured
Spin potential79th pct · 1 measured
Ball bite88th pct · 1 measured
String friction45th pct · 1 measured

V-Torque 18 (1.18) mains / Tornado 18 (1.17) crosses

Stiffness27th pct · 1 measured
Tension loss73rd pct · 1 measured
Energy return27th pct · 1 measured
Spin potential79th pct · 1 measured
Ball bite81st pct · 1 measured
String friction35th pct · 1 measured

Open this in the hybrid builder

Which goes dead first?

Estimated from tension loss, which is the only thing the database measures about ageing. This is when the bed stops playing the way you strung it, not when the string breaks.

Tornado 18 (1.17)

~20 hours of play

V-Torque 18 (1.18)

~16 hours of play

Both strings in full

Every published measurement
StringGaugePriceStiff lb/inLoss %Power %SpinBite COFFriction COF
Signum Pro Tornado 18 (1.17) Polyester18find16739865.90.5460.092
Volkl V-Torque 18 (1.18) Polyester18$10.9915746866.00.5020.083

Add a third string Tornado 18 (1.17) in full V-Torque 18 (1.18) in full