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Head to head

Gosen AK Pro 16 vs Head FXP 17

FXP 17 leads on 4 of 6 measurements. The widest gap is string friction, where AK Pro 16 is 12 percentile points ahead. Every figure is a testing-machine result at a fixed reference tension.

Measured, side by side

Gosen

AK Pro 16

Nylon · 16 ga

Head

FXP 17

Nylon · 17 ga

Stiffness lower = softer, kinder on the arm
17442nd pct
17341st pct
Tension loss lower = stays where you strung it
2225th pct
2119th pct
Energy return higher = livelier, more free power
9381st pct
9490th pct
Spin potential higher = more spin off the string bed
4.337th pct
4.132nd pct
Ball bite higher = grabs the ball harder
0.39822nd pct
0.41231st pct
String friction lower = strings slide and snap back
0.09353rd pct
0.10165th 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 AK Pro 16 at 52 lb

String FXP 17 at 54.6 lb 24.8 kg

Coming from FXP 17 at 52 lb

String AK Pro 16 at 49.7 lb 22.5 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.

AK Pro 16 mains / FXP 17 crosses

Stiffness42nd pct · 1 measured
Tension loss24th pct · 1 measured
Energy return86th pct · 1 measured
Spin potential36th pct · 1 measured
Ball bite24th pct · 1 measured
String friction56th pct · 1 measured

FXP 17 mains / AK Pro 16 crosses

Stiffness42nd pct · 1 measured
Tension loss21st pct · 1 measured
Energy return87th pct · 1 measured
Spin potential33rd pct · 1 measured
Ball bite29th pct · 1 measured
String friction62nd 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.

AK Pro 16

~32 hours of play

FXP 17

~34 hours of play

Both strings in full

Every published measurement
StringGaugePriceStiff lb/inLoss %Power %SpinBite COFFriction COF
Gosen AK Pro 16 Nylon16find17422934.30.3980.093
Head FXP 17 Nylon17find17321944.10.4120.101

Add a third string AK Pro 16 in full FXP 17 in full