Head to head

Gamma RZR Rx 17 vs Head Hawk Touch 19 (1.15)

They split the measurements 3–3. The widest gap is string friction, where Hawk Touch 19 (1.15) is 10 percentile points ahead. Every figure is a testing-machine result at a fixed reference tension.

Measured, side by side

Gamma

RZR Rx 17

Polyester · 17 ga

Head

Hawk Touch 19 (1.15)

Polyester · 19 ga

Stiffness lower = softer, kinder on the arm
18552nd pct
19259th pct
Tension loss lower = stays where you strung it
2945th pct
3353rd pct
Energy return higher = livelier, more free power
8848th pct
8850th pct
Spin potential higher = more spin off the string bed
4.851st pct
4.954th pct
Ball bite higher = grabs the ball harder
0.44855th pct
0.43447th pct
String friction lower = strings slide and snap back
0.09455th pct
0.08944th 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 RZR Rx 17 at 52 lb

String Hawk Touch 19 (1.15) at 50.2 lb 22.8 kg

Coming from Hawk Touch 19 (1.15) at 52 lb

String RZR Rx 17 at 53.9 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.

RZR Rx 17 mains / Hawk Touch 19 (1.15) crosses

Stiffness55th pct · 1 measured
Tension loss48th pct · 1 measured
Energy return49th pct · 1 measured
Spin potential53rd pct · 1 measured
Ball bite52nd pct · 1 measured
String friction52nd pct · 1 measured

Hawk Touch 19 (1.15) mains / RZR Rx 17 crosses

Stiffness57th pct · 1 measured
Tension loss50th pct · 1 measured
Energy return49th pct · 1 measured
Spin potential53rd pct · 1 measured
Ball bite49th 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.

RZR Rx 17

~27 hours of play

Hawk Touch 19 (1.15)

~24 hours of play

Both strings in full

Every published measurement
StringGaugePriceStiff lb/inLoss %Power %SpinBite COFFriction COF
Gamma RZR Rx 17 Polyester17find18529884.80.4480.094
Head Hawk Touch 19 (1.15) Polyester19find19233884.90.4340.089

Add a third string RZR Rx 17 in full Hawk Touch 19 (1.15) in full