Head to head

Gamma FXT 17 (1.24) vs Tourna Quasi-Gut Armor 16

They split the measurements 3–3. The widest gap is ball bite, where Quasi-Gut Armor 16 is 28 percentile points ahead. Every figure is a testing-machine result at a fixed reference tension.

Measured, side by side

Gamma

FXT 17 (1.24)

Nylon · 17 ga

Tourna

Quasi-Gut Armor 16

Nylon/Polyester · 16 ga

Stiffness lower = softer, kinder on the arm
15417th pct
15316th pct
Tension loss lower = stays where you strung it
121st pct
132nd pct
Energy return higher = livelier, more free power
9490th pct
9388th pct
Spin potential higher = more spin off the string bed
4.851st pct
4.954th pct
Ball bite higher = grabs the ball harder
0.45257th pct
0.52686th pct
Snapback lower = strings slide and snap back
0.09556th pct
0.10772nd pct

Bars are percentile against all 788 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 FXT 17 (1.24) at 52 lb

String Quasi-Gut Armor 16 at 52.4 lb 23.8 kg

Coming from Quasi-Gut Armor 16 at 52 lb

String FXT 17 (1.24) 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.

FXT 17 (1.24) mains / Quasi-Gut Armor 16 crosses

Stiffness17th pct · 1 measured
Tension loss1st pct · 1 measured
Energy return89th pct · 1 measured
Spin potential53rd pct · 1 measured
Ball bite63rd pct · 1 measured
Snapback61st pct · 1 measured

Quasi-Gut Armor 16 mains / FXT 17 (1.24) crosses

Stiffness16th pct · 1 measured
Tension loss1st pct · 1 measured
Energy return89th pct · 1 measured
Spin potential53rd pct · 1 measured
Ball bite83rd pct · 1 measured
Snapback69th 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.

FXT 17 (1.24)

~40 hours of play

Quasi-Gut Armor 16

~39 hours of play

Both strings in full

Every published measurement
StringGaugeStiff lb/inLoss %Power %SpinBite COFSnap COF
Gamma FXT 17 (1.24) Nylon1715412944.80.4520.095
Tourna Quasi-Gut Armor 16 Nylon/Polyester1615313934.90.5260.107

Add a third string FXT 17 (1.24) in full Quasi-Gut Armor 16 in full