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Browse all 791

Head to head

Tecnifibre X-One Biphase 17 vs Wilson NXT OS

X-One Biphase 17 leads on 4 of 6 measurements. The widest gap is energy return, where X-One Biphase 17 is 9 percentile points ahead. Every figure is a testing-machine result at a fixed reference tension.

Measured, side by side

Tecnifibre

X-One Biphase 17

Nylon/Polyurethane · 17 ga

Wilson

NXT OS

Nylon

Stiffness lower = softer, kinder on the arm
16735th pct
17038th pct
Tension loss lower = stays where you strung it
155th pct
1914th pct
Energy return higher = livelier, more free power
9490th pct
9381st pct
Spin potential higher = more spin off the string bed
2.12nd pct
2.54th pct
Ball bite higher = grabs the ball harder
0.46463rd pct
0.45961st pct
String friction lower = strings slide and snap back
0.22599th pct
0.18197th 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 X-One Biphase 17 at 52 lb

String NXT OS at 51.1 lb 23.2 kg

Coming from NXT OS at 52 lb

String X-One Biphase 17 at 53.1 lb 24.1 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.

X-One Biphase 17 mains / NXT OS crosses

Stiffness36th pct · 1 measured
Tension loss7th pct · 1 measured
Energy return87th pct · 1 measured
Spin potential3rd pct · 1 measured
Ball bite63rd pct · 1 measured
String friction99th pct · 1 measured

NXT OS mains / X-One Biphase 17 crosses

Stiffness36th pct · 1 measured
Tension loss10th pct · 1 measured
Energy return86th pct · 1 measured
Spin potential4th pct · 1 measured
Ball bite61st pct · 1 measured
String friction97th 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.

X-One Biphase 17

~39 hours of play

NXT OS

~36 hours of play

Both strings in full

Every published measurement
StringGaugePriceStiff lb/inLoss %Power %SpinBite COFFriction COF
Tecnifibre X-One Biphase 17 Nylon/Polyurethane17$17.9616715942.10.4640.225
Wilson NXT OS Nylon—find17019932.50.4590.181

Add a third string X-One Biphase 17 in full NXT OS in full