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Head to head

Head Hawk Rough 17 vs Kirschbaum Pro Line Evolution 17 (1.25)

Hawk Rough 17 leads on 4 of 6 measurements. The widest gap is ball bite, where Hawk Rough 17 is 19 percentile points ahead. Every figure is a testing-machine result at a fixed reference tension.

Measured, side by side

Head

Hawk Rough 17

Polyester · 17 ga

Kirschbaum

Pro Line Evolution 17 (1.25)

Polyester · 17 ga

Stiffness lower = softer, kinder on the arm
20169th pct
20876th pct
Tension loss lower = stays where you strung it
2432nd pct
2946th pct
Energy return higher = livelier, more free power
9164th pct
8955th pct
Spin potential higher = more spin off the string bed
4.954th pct
4.954th pct
Ball bite higher = grabs the ball harder
0.47668th pct
0.43749th pct
String friction lower = strings slide and snap back
0.09759th pct
0.09046th 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 Rough 17 at 52 lb

String Pro Line Evolution 17 (1.25) at 50.3 lb 22.8 kg

Coming from Pro Line Evolution 17 (1.25) at 52 lb

String Hawk Rough 17 at 53.8 lb 24.4 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 Rough 17 mains / Pro Line Evolution 17 (1.25) crosses

Stiffness72nd pct · 1 measured
Tension loss37th pct · 1 measured
Energy return61st pct · 1 measured
Spin potential54th pct · 1 measured
Ball bite66th pct · 1 measured
String friction57th pct · 1 measured

Pro Line Evolution 17 (1.25) mains / Hawk Rough 17 crosses

Stiffness73rd pct · 1 measured
Tension loss41st pct · 1 measured
Energy return59th pct · 1 measured
Spin potential54th pct · 1 measured
Ball bite51st pct · 1 measured
String friction48th 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 Rough 17

~31 hours of play

Pro Line Evolution 17 (1.25)

~26 hours of play

Both strings in full

Every published measurement
StringGaugePriceStiff lb/inLoss %Power %SpinBite COFFriction COF
Head Hawk Rough 17 Polyester17find20124914.90.4760.097
Kirschbaum Pro Line Evolution 17 (1.25) Polyester17find20829894.90.4370.090

Add a third string Hawk Rough 17 in full Pro Line Evolution 17 (1.25) in full