Head to head

Gosen Sidewinder 16 (1.31) vs Head Sonic Pro 17

Sidewinder 16 (1.31) leads on 4 of 6 measurements. The widest gap is string friction, where Sonic Pro 17 is 36 percentile points ahead. Every figure is a testing-machine result at a fixed reference tension.

Measured, side by side

Gosen

Sidewinder 16 (1.31)

Polyester · 16 ga

Head

Sonic Pro 17

Polyester · 17 ga

Stiffness lower = softer, kinder on the arm
16330th pct
16532nd pct
Tension loss lower = stays where you strung it
4781st pct
5594th pct
Energy return higher = livelier, more free power
8733rd pct
8413th pct
Spin potential higher = more spin off the string bed
3.824th pct
3.927th pct
Ball bite higher = grabs the ball harder
0.41634th pct
0.3422nd pct
String friction lower = strings slide and snap back
0.11076th pct
0.08739th 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 Sidewinder 16 (1.31) at 52 lb

String Sonic Pro 17 at 51.6 lb 23.4 kg

Coming from Sonic Pro 17 at 52 lb

String Sidewinder 16 (1.31) at 52.4 lb 23.8 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.

Sidewinder 16 (1.31) mains / Sonic Pro 17 crosses

Stiffness31st pct · 1 measured
Tension loss88th pct · 1 measured
Energy return24th pct · 1 measured
Spin potential25th pct · 1 measured
Ball bite26th pct · 1 measured
String friction69th pct · 1 measured

Sonic Pro 17 mains / Sidewinder 16 (1.31) crosses

Stiffness31st pct · 1 measured
Tension loss92nd pct · 1 measured
Energy return19th pct · 1 measured
Spin potential25th pct · 1 measured
Ball bite3rd pct · 1 measured
String friction52nd 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.

Sidewinder 16 (1.31)

~16 hours of play

Sonic Pro 17

~12 hours of play

Both strings in full

Every published measurement
StringGaugePriceStiff lb/inLoss %Power %SpinBite COFFriction COF
Gosen Sidewinder 16 (1.31) Polyester16find16347873.80.4160.110
Head Sonic Pro 17 Polyester17$8.2516555843.90.3420.087

Add a third string Sidewinder 16 (1.31) in full Sonic Pro 17 in full