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Gosen

AK Pro 17

Nylon Gauge 17 1.25 mm In production

Lab measurements for Gosen AK Pro 17, ranked against all 789 strings in the database. Every figure below is a testing-machine result at a fixed reference tension, not a playtest opinion.

Measured values

Stiffness

162lb/in

lower = softer, kinder on the arm

Tension loss

21%

lower = stays where you strung it

Energy return

91%

higher = livelier, more free power

Spin potential

4.4

higher = more spin off the string bed

Ball bite

0.393COF

higher = grabs the ball harder

Snapback

0.089COF

lower = strings slide and snap back

How it ranks against all 789 strings

Stiffness 162 lb/in · 29th pct

Stiffer than 29% of strings tested.

Tension loss 21 % · 20th pct

Sheds more tension than 20% of strings tested.

Energy return 91 % · 68th pct

Livelier than 68% of strings tested.

Spin potential 4.4 · 40th pct

More spin potential than 40% of strings tested.

Ball bite 0.393 COF · 19th pct

Grips the ball harder than 19% of strings tested.

Snapback 0.089 COF · 44th pct

More string-on-string friction than 44% of strings tested.

Strings that play like this

Closest matches across stiffness, tension loss, energy return and spin potential.

Gosen Compositemaster I 16 96% match Wilson NXT Duramax 15 (1.40) 94% match Head FXP Power 17 94% match Wilson K-Gut 16 94% match Gamma TNT2 Tour 17 (1.27) 94% match Toalson Leoina 77 (1.30) 93% match

More from Gosen

What these numbers mean

Stiffness · lb/in

How much the string bed resists deflection. Higher plays firmer and more controlled; lower plays softer and easier on the arm.

Tension loss · %

Share of the reference tension the string sheds under a fixed test protocol. Lower means the bed stays where you strung it for longer.

Energy return · %

Share of impact energy handed back to the ball. Higher plays livelier and more powerful.

Spin potential

Ball friction divided by string-on-string friction. Higher means better bite with a cleaner snapback, so more spin.

Ball bite · COF

String-on-ball friction. Higher grabs the ball harder through the brush.

Snapback · COF

String-on-string friction. Lower lets the mains slide and snap back into place after impact.

Compare AK Pro 17 against 789 strings Find the right string for me