StringSpec
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Browse all 791

Head to head

Kirschbaum Pro Line II 17 (1.25) vs LaserFibre Native Tour 17 (1.25)

They split the measurements 3–3. The widest gap is ball bite, where Native Tour 17 (1.25) is 12 percentile points ahead. Every figure is a testing-machine result at a fixed reference tension.

Measured, side by side

Kirschbaum

Pro Line II 17 (1.25)

Polyester · 17 ga

LaserFibre

Native Tour 17 (1.25)

Polyester · 17 ga

Stiffness lower = softer, kinder on the arm
20169th pct
20068th pct
Tension loss lower = stays where you strung it
4576th pct
4680th pct
Energy return higher = livelier, more free power
8516th pct
8413th pct
Spin potential higher = more spin off the string bed
4.748th pct
4.954th pct
Ball bite higher = grabs the ball harder
0.47066th pct
0.50077th pct
String friction lower = strings slide and snap back
0.10165th pct
0.10266th 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 Pro Line II 17 (1.25) at 52 lb

String Native Tour 17 (1.25) at 52.3 lb 23.7 kg

Coming from Native Tour 17 (1.25) at 52 lb

String Pro Line II 17 (1.25) at 51.7 lb 23.5 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.

Pro Line II 17 (1.25) mains / Native Tour 17 (1.25) crosses

Stiffness69th pct · 1 measured
Tension loss78th pct · 1 measured
Energy return15th pct · 1 measured
Spin potential49th pct · 1 measured
Ball bite67th pct · 1 measured
String friction66th pct · 1 measured

Native Tour 17 (1.25) mains / Pro Line II 17 (1.25) crosses

Stiffness68th pct · 1 measured
Tension loss78th pct · 1 measured
Energy return15th pct · 1 measured
Spin potential53rd pct · 1 measured
Ball bite76th pct · 1 measured
String friction66th 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.

Pro Line II 17 (1.25)

~17 hours of play

Native Tour 17 (1.25)

~16 hours of play

Both strings in full

Every published measurement
StringGaugePriceStiff lb/inLoss %Power %SpinBite COFFriction COF
Kirschbaum Pro Line II 17 (1.25) Polyester17find20145854.70.4700.101
LaserFibre Native Tour 17 (1.25) Polyester17find20046844.90.5000.102

Add a third string Pro Line II 17 (1.25) in full Native Tour 17 (1.25) in full