Head to head
Tourna Quasi Gut 17 vs Yonex Rexis Speed 16L (1.25)
Rexis Speed 16L (1.25) leads on 5 of 6 measurements. The widest gap is tension loss, where Quasi Gut 17 is 12 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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Quasi Gut 17253rd
Rexis Speed 16L (1.25)196th
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Quasi Gut 1786th
Rexis Speed 16L (1.25)92nd
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Quasi Gut 17671st
Rexis Speed 16L (1.25)672nd
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Quasi Gut 17154th
Rexis Speed 16L (1.25)134th
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Quasi Gut 17269th
Rexis Speed 16L (1.25)338th
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Quasi Gut 17557th
Rexis Speed 16L (1.25)673rd
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Quasi Gut 17154th
Rexis Speed 16L (1.25)164th
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 Quasi Gut 17 at 52 lb
String Rexis Speed 16L (1.25) at 53.4 lb 24.2 kg
Coming from Rexis Speed 16L (1.25) at 52 lb
String Quasi Gut 17 at 50.6 lb 23.0 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.
Quasi Gut 17 mains / Rexis Speed 16L (1.25) crosses
Rexis Speed 16L (1.25) mains / Quasi Gut 17 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.
Quasi Gut 17
~30 hours of play
Rexis Speed 16L (1.25)
~26 hours of play
Both strings in full
| String | Gauge | Price | Stiff lb/in | Loss % | Power % | Spin | Bite COF | Friction COF |
|---|---|---|---|---|---|---|---|---|
| Tourna Quasi Gut 17 Nylon | 17 | $9.95 | 129 | 25 | 91 | 5.2 | 0.524 | 0.101 |
| Yonex Rexis Speed 16L (1.25) Nylon | 16L | find | 126 | 29 | 92 | 5.6 | 0.531 | 0.094 |
Add a third string Quasi Gut 17 in full Rexis Speed 16L (1.25) in full