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Head to head

Kirschbaum Super Smash 17 (1.25) vs Prince Tour XR 15L (1.35)

They split the measurements 3–3. The widest gap is ball bite, where Tour XR 15L (1.35) is 15 percentile points ahead. Every figure is a testing-machine result at a fixed reference tension.

Measured, side by side

Kirschbaum

Super Smash 17 (1.25)

Polyester · 17 ga

Prince

Tour XR 15L (1.35)

Polyester · 15L ga

Stiffness lower = softer, kinder on the arm
21180th pct
21382nd pct
Tension loss lower = stays where you strung it
4885th pct
4986th pct
Energy return higher = livelier, more free power
8310th pct
827th pct
Spin potential higher = more spin off the string bed
5.774th pct
6.788th pct
Ball bite higher = grabs the ball harder
0.45358th pct
0.48873rd pct
Snapback lower = strings slide and snap back
0.08023rd pct
0.0739th 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 Super Smash 17 (1.25) at 52 lb

String Tour XR 15L (1.35) at 51.4 lb 23.3 kg

Coming from Tour XR 15L (1.35) at 52 lb

String Super Smash 17 (1.25) at 52.6 lb 23.9 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.

Super Smash 17 (1.25) mains / Tour XR 15L (1.35) crosses

Stiffness80th pct · 1 measured
Tension loss85th pct · 1 measured
Energy return7th pct · 1 measured
Spin potential78th pct · 1 measured
Ball bite61st pct · 1 measured
Snapback19th pct · 1 measured

Tour XR 15L (1.35) mains / Super Smash 17 (1.25) crosses

Stiffness81st pct · 1 measured
Tension loss85th pct · 1 measured
Energy return7th pct · 1 measured
Spin potential86th pct · 1 measured
Ball bite71st pct · 1 measured
Snapback13th 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.

Super Smash 17 (1.25)

~15 hours of play

Tour XR 15L (1.35)

~14 hours of play

Both strings in full

Every published measurement
StringGaugeStiff lb/inLoss %Power %SpinBite COFSnap COF
Kirschbaum Super Smash 17 (1.25) Polyester1721148835.70.4530.080
Prince Tour XR 15L (1.35) Polyester15L21349826.70.4880.073

Add a third string Super Smash 17 (1.25) in full Tour XR 15L (1.35) in full