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Volkl

Power-Fiber II 17

Nylon Gauge 17 1.28 mm In production

Lab measurements for Volkl Power-Fiber II 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

159lb/in

lower = softer, kinder on the arm

Tension loss

20%

lower = stays where you strung it

Energy return

94%

higher = livelier, more free power

Spin potential

2.7

higher = more spin off the string bed

Ball bite

0.403COF

higher = grabs the ball harder

Snapback

0.150COF

lower = strings slide and snap back

How it ranks against all 789 strings

Stiffness 159 lb/in · 24th pct

Stiffer than 24% of strings tested.

Tension loss 20 % · 16th pct

Sheds more tension than 16% of strings tested.

Energy return 94 % · 92nd pct

Livelier than 92% of strings tested — huge free power off the string bed.

Spin potential 2.7 · 6th pct

More spin potential than 6% of strings tested — minimal spin generation.

Ball bite 0.403 COF · 26th pct

Grips the ball harder than 26% of strings tested.

Snapback 0.150 COF · 94th pct

More string-on-string friction than 94% of strings tested — notches badly and stays put.

Strings that play like this

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

Gosen OG Sheep Micro 18 95% match Alpha Gut 2000 16 95% match Head PerfectControl 16 95% match Dunlop S-Gut 17 95% match Babolat Addiction 17 94% match Tecnifibre NRG2 16 94% match

More from Volkl

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 Power-Fiber II 17 against 789 strings Find the right string for me