StringSpec
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Browse all 788

Head to head

Boris Becker Bomber NYC 17 (1.23) vs Yonex Poly Tour HS 16L (1.25)

They split the measurements 3–3. The widest gap is ball bite, where Poly Tour HS 16L (1.25) is 24 percentile points ahead. Every figure is a testing-machine result at a fixed reference tension.

Measured, side by side

Boris Becker

Bomber NYC 17 (1.23)

Polyester · 17 ga

Yonex

Poly Tour HS 16L (1.25)

Polyester · 16L ga

Stiffness lower = softer, kinder on the arm
20674th pct
19867th pct
Tension loss lower = stays where you strung it
2741st pct
2944th pct
Energy return higher = livelier, more free power
8957th pct
8848th pct
Spin potential higher = more spin off the string bed
5.569th pct
5.774th pct
Ball bite higher = grabs the ball harder
0.42038th pct
0.46162nd pct
String friction lower = strings slide and snap back
0.07615th pct
0.08126th 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 Bomber NYC 17 (1.23) at 52 lb

String Poly Tour HS 16L (1.25) at 53.9 lb 24.4 kg

Coming from Poly Tour HS 16L (1.25) at 52 lb

String Bomber NYC 17 (1.23) at 50.1 lb 22.7 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.

Bomber NYC 17 (1.23) mains / Poly Tour HS 16L (1.25) crosses

Stiffness70th pct · 1 measured
Tension loss42nd pct · 1 measured
Energy return54th pct · 1 measured
Spin potential70th pct · 1 measured
Ball bite42nd pct · 1 measured
String friction18th pct · 1 measured

Poly Tour HS 16L (1.25) mains / Bomber NYC 17 (1.23) crosses

Stiffness70th pct · 1 measured
Tension loss43rd pct · 1 measured
Energy return53rd pct · 1 measured
Spin potential73rd pct · 1 measured
Ball bite59th pct · 1 measured
String friction22nd 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.

Bomber NYC 17 (1.23)

~28 hours of play

Poly Tour HS 16L (1.25)

~27 hours of play

Both strings in full

Every published measurement
StringGaugePriceStiff lb/inLoss %Power %SpinBite COFFriction COF
Boris Becker Bomber NYC 17 (1.23) Polyester17find20627895.50.4200.076
Yonex Poly Tour HS 16L (1.25) Polyester16Lfind19829885.70.4610.081

Add a third string Bomber NYC 17 (1.23) in full Poly Tour HS 16L (1.25) in full