StringSpec
String finder

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Head to head

Dunlop X-Life Synthetic 15L vs Wilson NXT Tour 16

NXT Tour 16 leads on 4 of 6 measurements. The widest gap is ball bite, where NXT Tour 16 is 52 percentile points ahead. Every figure is a testing-machine result at a fixed reference tension.

Measured, side by side

Dunlop

X-Life Synthetic 15L

Nylon · 15L ga

Wilson

NXT Tour 16

Nylon · 16 ga

Stiffness lower = softer, kinder on the arm
17744th pct
18147th pct
Tension loss lower = stays where you strung it
2226th pct
2123rd pct
Energy return higher = livelier, more free power
9168th pct
9270th pct
Spin potential higher = more spin off the string bed
3.518th pct
3.824th pct
Ball bite higher = grabs the ball harder
0.37912th pct
0.46664th pct
String friction lower = strings slide and snap back
0.10772nd pct
0.12284th 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-Life Synthetic 15L at 52 lb

String NXT Tour 16 at 51.5 lb 23.4 kg

Coming from NXT Tour 16 at 52 lb

String X-Life Synthetic 15L at 52.4 lb 23.8 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-Life Synthetic 15L mains / NXT Tour 16 crosses

Stiffness45th pct · 1 measured
Tension loss25th pct · 1 measured
Energy return68th pct · 1 measured
Spin potential19th pct · 1 measured
Ball bite19th pct · 1 measured
String friction76th pct · 1 measured

NXT Tour 16 mains / X-Life Synthetic 15L crosses

Stiffness45th pct · 1 measured
Tension loss24th pct · 1 measured
Energy return70th pct · 1 measured
Spin potential24th pct · 1 measured
Ball bite57th pct · 1 measured
String friction82nd 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-Life Synthetic 15L

~32 hours of play

NXT Tour 16

~33 hours of play

Both strings in full

Every published measurement
StringGaugePriceStiff lb/inLoss %Power %SpinBite COFFriction COF
Dunlop X-Life Synthetic 15L Nylon15Lfind17722913.50.3790.107
Wilson NXT Tour 16 Nylon16find18121923.80.4660.122

Add a third string X-Life Synthetic 15L in full NXT Tour 16 in full