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
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.
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Hawk 17 (1.25)391st
V-Pro 18333rd
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Hawk 17 (1.25)521st
V-Pro 18570th
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Hawk 17 (1.25)296th
V-Pro 18234th
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Hawk 17 (1.25)427th
V-Pro 18445th
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Hawk 17 (1.25)428th
V-Pro 18426th
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Hawk 17 (1.25)159th
V-Pro 18429th
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Hawk 17 (1.25)435th
V-Pro 18462nd
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
V-Pro 18 mains / Hawk 17 (1.25) crosses
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
| String | Gauge | Price | Stiff lb/in | Loss % | Power % | Spin | Bite COF | Friction COF |
|---|---|---|---|---|---|---|---|---|
| Head Hawk 17 (1.25) Polyester | 17 | $9.99 | 205 | 33 | 88 | 4.7 | 0.323 | 0.069 |
| Volkl V-Pro 18 Polyester | 18 | $8.99 | 213 | 33 | 88 | 4.9 | 0.429 | 0.087 |