Head to head
Gosen Polylon PolyBreak 17 (1.24) vs MSV Co.-Focus 16L
Co.-Focus 16L leads on 3 of 6 measurements. The widest gap is ball bite, where Polylon PolyBreak 17 (1.24) is 37 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 PolyBreak 17 (1.24)456th
Co.-Focus 16L490th
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Polylon PolyBreak 17 (1.24)584th
Co.-Focus 16L473rd
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Polylon PolyBreak 17 (1.24)266th
Co.-Focus 16L401st
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Polylon PolyBreak 17 (1.24)648th
Co.-Focus 16L528th
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Polylon PolyBreak 17 (1.24)680th
Co.-Focus 16L681st
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Polylon PolyBreak 17 (1.24)495th
Co.-Focus 16L278th
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Polylon PolyBreak 17 (1.24)661st
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 PolyBreak 17 (1.24) at 52 lb
String Co.-Focus 16L at 55.9 lb 25.4 kg
Coming from Co.-Focus 16L at 52 lb
String Polylon PolyBreak 17 (1.24) at 48.7 lb 22.1 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 PolyBreak 17 (1.24) mains / Co.-Focus 16L crosses
Co.-Focus 16L mains / Polylon PolyBreak 17 (1.24) 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 PolyBreak 17 (1.24)
~14 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 PolyBreak 17 (1.24) Polyester | 17 | find | 196 | 49 | 85 | 4.2 | 0.436 | 0.104 |
| MSV Co.-Focus 16L Polyester | 16L | find | 185 | 50 | 85 | 4.2 | 0.377 | 0.089 |
Add a third string Polylon PolyBreak 17 (1.24) in full Co.-Focus 16L in full