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Head to head

Gosen Poly Professional 17 (1.24) vs Tourna Big Hitter Black 7 17

They split the measurements 3–3. The widest gap is ball bite, where Big Hitter Black 7 17 is 35 percentile points ahead. Every figure is a testing-machine result at a fixed reference tension.

Measured, side by side

Gosen

Poly Professional 17 (1.24)

Polyester · 17 ga

Tourna

Big Hitter Black 7 17

Polyester · 17 ga

Stiffness lower = softer, kinder on the arm
16937th pct
17644th pct
Tension loss lower = stays where you strung it
4576th pct
4372nd pct
Energy return higher = livelier, more free power
8733rd pct
8631st pct
Spin potential higher = more spin off the string bed
5.671st pct
6.383rd pct
Ball bite higher = grabs the ball harder
0.45156th pct
0.55291st pct
String friction lower = strings slide and snap back
0.08126th pct
0.08842nd 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 Poly Professional 17 (1.24) at 52 lb

String Big Hitter Black 7 17 at 50.1 lb 22.7 kg

Coming from Big Hitter Black 7 17 at 52 lb

String Poly Professional 17 (1.24) 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.

Poly Professional 17 (1.24) mains / Big Hitter Black 7 17 crosses

Stiffness40th pct · 1 measured
Tension loss74th pct · 1 measured
Energy return32nd pct · 1 measured
Spin potential74th pct · 1 measured
Ball bite64th pct · 1 measured
String friction30th pct · 1 measured

Big Hitter Black 7 17 mains / Poly Professional 17 (1.24) crosses

Stiffness41st pct · 1 measured
Tension loss73rd pct · 1 measured
Energy return32nd pct · 1 measured
Spin potential81st pct · 1 measured
Ball bite88th pct · 1 measured
String friction38th 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.

Poly Professional 17 (1.24)

~17 hours of play

Big Hitter Black 7 17

~18 hours of play

Both strings in full

Every published measurement
StringGaugePriceStiff lb/inLoss %Power %SpinBite COFFriction COF
Gosen Poly Professional 17 (1.24) Polyester17find16945875.60.4510.081
Tourna Big Hitter Black 7 17 Polyester17$10.5017643866.30.5520.088

Add a third string Poly Professional 17 (1.24) in full Big Hitter Black 7 17 in full