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
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.
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Polylon SP 16 (1.30)509th
Co.-Focus 16L490th
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Polylon SP 16 (1.30)518th
Co.-Focus 16L473rd
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Polylon SP 16 (1.30)362nd
Co.-Focus 16L401st
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Polylon SP 16 (1.30)610th
Co.-Focus 16L528th
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Polylon SP 16 (1.30)721st
Co.-Focus 16L681st
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Polylon SP 16 (1.30)297th
Co.-Focus 16L278th
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Polylon SP 16 (1.30)633rd
Co.-Focus 16L554th
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
Co.-Focus 16L mains / Polylon SP 16 (1.30) crosses
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
| String | Gauge | Price | Stiff lb/in | Loss % | Power % | Spin | Bite COF | Friction COF |
|---|---|---|---|---|---|---|---|---|
| Gosen Polylon SP 16 (1.30) Polyester | 16 | find | 185 | 53 | 84 | 4.0 | 0.418 | 0.105 |
| MSV Co.-Focus 16L Polyester | 16L | find | 185 | 50 | 85 | 4.2 | 0.377 | 0.089 |
Add a third string Polylon SP 16 (1.30) in full Co.-Focus 16L in full