Head to head

Head Hawk 17 (1.25) vs Volkl V-Pro 18

They split the measurements 3–3. The widest gap is ball bite, where V-Pro 18 is 42 percentile points ahead. Every figure is a testing-machine result at a fixed reference tension.

Measured, side by side

Head

Hawk 17 (1.25)

Polyester · 17 ga

Volkl

V-Pro 18

Polyester · 18 ga

Stiffness lower = softer, kinder on the arm
20573rd pct
21382nd pct
Tension loss lower = stays where you strung it
3354th pct
3354th pct
Energy return higher = livelier, more free power
8846th pct
8850th pct
Spin potential higher = more spin off the string bed
4.748th pct
4.954th pct
Ball bite higher = grabs the ball harder
0.3231st pct
0.42943rd pct
String friction lower = strings slide and snap back
0.0694th pct
0.08739th 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 Hawk 17 (1.25) at 52 lb

String V-Pro 18 at 45.8 lb 20.8 kg

Coming from V-Pro 18 at 52 lb

String Hawk 17 (1.25) at 57.5 lb 26.1 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.

Hawk 17 (1.25) mains / V-Pro 18 crosses

Stiffness77th pct · 1 measured
Tension loss54th pct · 1 measured
Energy return48th pct · 1 measured
Spin potential49th pct · 1 measured
Ball bite2nd pct · 1 measured
String friction10th pct · 1 measured

V-Pro 18 mains / Hawk 17 (1.25) crosses

Stiffness79th pct · 1 measured
Tension loss54th pct · 1 measured
Energy return49th pct · 1 measured
Spin potential53rd pct · 1 measured
Ball bite32nd pct · 1 measured
String friction30th 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.

Hawk 17 (1.25)

~24 hours of play

V-Pro 18

~24 hours of play

Both strings in full

Every published measurement
StringGaugePriceStiff lb/inLoss %Power %SpinBite COFFriction COF
Head Hawk 17 (1.25) Polyester17$9.9920533884.70.3230.069
Volkl V-Pro 18 Polyester18$8.9921333884.90.4290.087

Add a third string Hawk 17 (1.25) in full V-Pro 18 in full