Head to head

Gamma Zo Dart 17 (1.25) vs Head Hawk Rough 17

Hawk Rough 17 leads on 4 of 6 measurements. The widest gap is string friction, where Zo Dart 17 (1.25) is 25 percentile points ahead. Every figure is a testing-machine result at a fixed reference tension.

Measured, side by side

Gamma

Zo Dart 17 (1.25)

Polyester · 17 ga

Head

Hawk Rough 17

Polyester · 17 ga

Stiffness lower = softer, kinder on the arm
20775th pct
20169th pct
Tension loss lower = stays where you strung it
2740th pct
2432nd pct
Energy return higher = livelier, more free power
8953rd pct
9164th pct
Spin potential higher = more spin off the string bed
5.364th pct
4.954th pct
Ball bite higher = grabs the ball harder
0.45257th pct
0.47668th pct
String friction lower = strings slide and snap back
0.08534th pct
0.09759th 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 Zo Dart 17 (1.25) at 52 lb

String Hawk Rough 17 at 53.5 lb 24.3 kg

Coming from Hawk Rough 17 at 52 lb

String Zo Dart 17 (1.25) at 50.6 lb 23.0 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.

Zo Dart 17 (1.25) mains / Hawk Rough 17 crosses

Stiffness73rd pct · 1 measured
Tension loss38th pct · 1 measured
Energy return58th pct · 1 measured
Spin potential63rd pct · 1 measured
Ball bite59th pct · 1 measured
String friction42nd pct · 1 measured

Hawk Rough 17 mains / Zo Dart 17 (1.25) crosses

Stiffness71st pct · 1 measured
Tension loss35th pct · 1 measured
Energy return60th pct · 1 measured
Spin potential55th pct · 1 measured
Ball bite67th pct · 1 measured
String friction56th 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.

Zo Dart 17 (1.25)

~28 hours of play

Hawk Rough 17

~31 hours of play

Both strings in full

Every published measurement
StringGaugePriceStiff lb/inLoss %Power %SpinBite COFFriction COF
Gamma Zo Dart 17 (1.25) Polyester17find20727895.30.4520.085
Head Hawk Rough 17 Polyester17find20124914.90.4760.097

Add a third string Zo Dart 17 (1.25) in full Hawk Rough 17 in full