StringSpec
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Browse all 791

Head to head

Kirschbaum Pro Line I 17 (1.25) vs Luxilon Big Banger XP 125/16L

Big Banger XP 125/16L leads on 3 of 6 measurements. The widest gap is ball bite, where Big Banger XP 125/16L is 17 percentile points ahead. Every figure is a testing-machine result at a fixed reference tension.

Measured, side by side

Kirschbaum

Pro Line I 17 (1.25)

Polyester · 17 ga

Luxilon

Big Banger XP 125/16L

Polyester · 16L ga

Stiffness lower = softer, kinder on the arm
20573rd pct
20978th pct
Tension loss lower = stays where you strung it
5190th pct
4987th pct
Energy return higher = livelier, more free power
8310th pct
8517th pct
Spin potential higher = more spin off the string bed
4.132nd pct
4.132nd pct
Ball bite higher = grabs the ball harder
0.37510th pct
0.40728th pct
String friction lower = strings slide and snap back
0.09148th pct
0.09962nd 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 I 17 (1.25) at 52 lb

String Big Banger XP 125/16L at 50.5 lb 22.9 kg

Coming from Big Banger XP 125/16L at 52 lb

String Pro Line I 17 (1.25) at 53.2 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.

Pro Line I 17 (1.25) mains / Big Banger XP 125/16L crosses

Stiffness74th pct · 1 measured
Tension loss88th pct · 1 measured
Energy return12th pct · 1 measured
Spin potential32nd pct · 1 measured
Ball bite12th pct · 1 measured
String friction53rd pct · 1 measured

Big Banger XP 125/16L mains / Pro Line I 17 (1.25) crosses

Stiffness75th pct · 1 measured
Tension loss88th pct · 1 measured
Energy return13th pct · 1 measured
Spin potential32nd pct · 1 measured
Ball bite25th pct · 1 measured
String friction59th 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 I 17 (1.25)

~13 hours of play

Big Banger XP 125/16L

~14 hours of play

Both strings in full

Every published measurement
StringGaugePriceStiff lb/inLoss %Power %SpinBite COFFriction COF
Kirschbaum Pro Line I 17 (1.25) Polyester17find20551834.10.3750.091
Luxilon Big Banger XP 125/16L Polyester16Lfind20949854.10.4070.099

Add a third string Pro Line I 17 (1.25) in full Big Banger XP 125/16L in full