StringSpec
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Browse all 791

Head to head

Double AR Raptor 1.27 vs Kirschbaum Max Power 17 (1.25)

They split the measurements 3–3. The widest gap is string friction, where Max Power 17 (1.25) is 17 percentile points ahead. Every figure is a testing-machine result at a fixed reference tension.

Measured, side by side

Double AR

Raptor 1.27

Polyester

Kirschbaum

Max Power 17 (1.25)

Polyester · 17 ga

Stiffness lower = softer, kinder on the arm
23897th pct
24198th pct
Tension loss lower = stays where you strung it
2227th pct
2431st pct
Energy return higher = livelier, more free power
9058th pct
9062nd pct
Spin potential higher = more spin off the string bed
5.364th pct
5.467th pct
Ball bite higher = grabs the ball harder
0.52184th pct
0.48571st pct
String friction lower = strings slide and snap back
0.09861st pct
0.08944th 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 Raptor 1.27 at 52 lb

String Max Power 17 (1.25) at 51.1 lb 23.2 kg

Coming from Max Power 17 (1.25) at 52 lb

String Raptor 1.27 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.

Raptor 1.27 mains / Max Power 17 (1.25) crosses

Stiffness98th pct · 1 measured
Tension loss28th pct · 1 measured
Energy return60th pct · 1 measured
Spin potential65th pct · 1 measured
Ball bite83rd pct · 1 measured
String friction57th pct · 1 measured

Max Power 17 (1.25) mains / Raptor 1.27 crosses

Stiffness98th pct · 1 measured
Tension loss29th pct · 1 measured
Energy return60th pct · 1 measured
Spin potential65th pct · 1 measured
Ball bite74th pct · 1 measured
String friction48th 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.

Raptor 1.27

~32 hours of play

Max Power 17 (1.25)

~31 hours of play

Both strings in full

Every published measurement
StringGaugePriceStiff lb/inLoss %Power %SpinBite COFFriction COF
Double AR Raptor 1.27 Polyester—find23822905.30.5210.098
Kirschbaum Max Power 17 (1.25) Polyester17find24124905.40.4850.089

Add a third string Raptor 1.27 in full Max Power 17 (1.25) in full