Head to head

Gosen Polylon SP 16 (1.30) vs MSV Co.-Focus 16L

Co.-Focus 16L leads on 4 of 6 measurements. The widest gap is string friction, where Co.-Focus 16L is 26 percentile points ahead. Every figure is a testing-machine result at a fixed reference tension.

Measured, side by side

Gosen

Polylon SP 16 (1.30)

Polyester · 16 ga

MSV

Co.-Focus 16L

Polyester · 16L ga

Stiffness lower = softer, kinder on the arm
18551st pct
18551st pct
Tension loss lower = stays where you strung it
5392nd pct
5088th pct
Energy return higher = livelier, more free power
8414th pct
8522nd pct
Spin potential higher = more spin off the string bed
4.030th pct
4.235th pct
Ball bite higher = grabs the ball harder
0.41836th pct
0.37711th pct
String friction lower = strings slide and snap back
0.10570th 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 Polylon SP 16 (1.30) at 52 lb

String Co.-Focus 16L at 52.5 lb 23.8 kg

Coming from Co.-Focus 16L at 52 lb

String Polylon SP 16 (1.30) at 51.6 lb 23.4 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.

Polylon SP 16 (1.30) mains / Co.-Focus 16L crosses

Stiffness51st pct · 1 measured
Tension loss91st pct · 1 measured
Energy return17th pct · 1 measured
Spin potential31st pct · 1 measured
Ball bite30th pct · 1 measured
String friction65th pct · 1 measured

Co.-Focus 16L mains / Polylon SP 16 (1.30) crosses

Stiffness51st pct · 1 measured
Tension loss89th pct · 1 measured
Energy return18th pct · 1 measured
Spin potential33rd pct · 1 measured
Ball bite14th pct · 1 measured
String friction53rd 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.

Polylon SP 16 (1.30)

~12 hours of play

Co.-Focus 16L

~14 hours of play

Both strings in full

Every published measurement
StringGaugePriceStiff lb/inLoss %Power %SpinBite COFFriction COF
Gosen Polylon SP 16 (1.30) Polyester16find18553844.00.4180.105
MSV Co.-Focus 16L Polyester16Lfind18550854.20.3770.089

Add a third string Polylon SP 16 (1.30) in full Co.-Focus 16L in full