Head to head
Gamma Zo Black Ice 18 (1.18) vs Wilson Spin Cycle 16L
They split the measurements 3–3. The widest gap is string friction, where Spin Cycle 16L is 10 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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Zo Black Ice 18 (1.18)492nd
Spin Cycle 16L472nd
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Zo Black Ice 18 (1.18)511th
Spin Cycle 16L554th
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Zo Black Ice 18 (1.18)365th
Spin Cycle 16L290th
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Zo Black Ice 18 (1.18)416th
Spin Cycle 16L477th
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Zo Black Ice 18 (1.18)510th
Spin Cycle 16L508th
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Zo Black Ice 18 (1.18)614th
Spin Cycle 16L389th
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Zo Black Ice 18 (1.18)453rd
Spin Cycle 16L489th
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 Zo Black Ice 18 (1.18) at 52 lb
String Spin Cycle 16L at 51.9 lb 23.5 kg
Coming from Spin Cycle 16L at 52 lb
String Zo Black Ice 18 (1.18) at 52.2 lb 23.7 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.
Zo Black Ice 18 (1.18) mains / Spin Cycle 16L crosses
Spin Cycle 16L mains / Zo Black Ice 18 (1.18) 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.
Zo Black Ice 18 (1.18)
~20 hours of play
Spin Cycle 16L
~20 hours of play
Both strings in full
| String | Gauge | Price | Stiff lb/in | Loss % | Power % | Spin | Bite COF | Friction COF |
|---|---|---|---|---|---|---|---|---|
| Gamma Zo Black Ice 18 (1.18) Polyester | 18 | find | 200 | 40 | 88 | 4.0 | 0.431 | 0.108 |
| Wilson Spin Cycle 16L Polyester | 16L | find | 206 | 39 | 88 | 4.2 | 0.420 | 0.100 |
Add a third string Zo Black Ice 18 (1.18) in full Spin Cycle 16L in full