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Pacific

Poly Force 17

Polyester Gauge 17 1.28 mm In production

Lab measurements for Pacific Poly Force 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

233lb/in

lower = softer, kinder on the arm

Tension loss

37%

lower = stays where you strung it

Energy return

89%

higher = livelier, more free power

Spin potential

4.5

higher = more spin off the string bed

Ball bite

0.356COF

higher = grabs the ball harder

Snapback

0.080COF

lower = strings slide and snap back

How it ranks against all 789 strings

Stiffness 233 lb/in · 95th pct

Stiffer than 95% of strings tested — punishingly firm — control at the cost of comfort.

Tension loss 37 % · 62nd pct

Sheds more tension than 62% of strings tested.

Energy return 89 % · 52nd pct

Livelier than 52% of strings tested.

Spin potential 4.5 · 43rd pct

More spin potential than 43% of strings tested.

Ball bite 0.356 COF · 3rd pct

Grips the ball harder than 3% of strings tested — slick against the ball.

Snapback 0.080 COF · 23rd pct

More string-on-string friction than 23% of strings tested.

Strings that play like this

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

Babolat RPM Dual 16 97% match Tecnifibre Pro Red Code 17 95% match Dunlop Explosive 16 93% match Gamma Zo Magic 16 93% match Babolat Hurricane Feel 17 93% match Tecnifibre Razor Code 16 (1.30) 93% match

More from Pacific

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 Poly Force 17 against 789 strings Find the right string for me