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

Tourna

Quasi Gut 17

Nylon · 17 ga

Yonex

Rexis Speed 16L (1.25)

Nylon · 16L ga

Stiffness lower = softer, kinder on the arm
1294th pct
1263rd pct
Tension loss lower = stays where you strung it
2534th pct
2946th pct
Energy return higher = livelier, more free power
9168th pct
9270th pct
Spin potential higher = more spin off the string bed
5.262nd pct
5.671st pct
Ball bite higher = grabs the ball harder
0.52485th pct
0.53187th pct
String friction lower = strings slide and snap back
0.10165th pct
0.09455th 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 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

Stiffness3rd pct · 1 measured
Tension loss38th pct · 1 measured
Energy return68th pct · 1 measured
Spin potential63rd pct · 1 measured
Ball bite85th pct · 1 measured
String friction62nd pct · 1 measured

Rexis Speed 16L (1.25) mains / Quasi Gut 17 crosses

Stiffness3rd pct · 1 measured
Tension loss42nd pct · 1 measured
Energy return70th pct · 1 measured
Spin potential70th pct · 1 measured
Ball bite86th pct · 1 measured
String friction57th 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.

Quasi Gut 17

~30 hours of play

Rexis Speed 16L (1.25)

~26 hours of play

Both strings in full

Every published measurement
StringGaugePriceStiff lb/inLoss %Power %SpinBite COFFriction COF
Tourna Quasi Gut 17 Nylon17$9.9512925915.20.5240.101
Yonex Rexis Speed 16L (1.25) Nylon16Lfind12629925.60.5310.094

Add a third string Quasi Gut 17 in full Rexis Speed 16L (1.25) in full