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Signum Pro

Poly-Plasma 16L

Polyester Gauge 16L 1.30 mm In production

Lab measurements for Signum Pro Poly-Plasma 16L, 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

226lb/in

lower = softer, kinder on the arm

Tension loss

39%

lower = stays where you strung it

Energy return

87%

higher = livelier, more free power

Spin potential

4.7

higher = more spin off the string bed

Ball bite

0.465COF

higher = grabs the ball harder

Snapback

0.098COF

lower = strings slide and snap back

How it ranks against all 789 strings

Stiffness 226 lb/in · 91st pct

Stiffer than 91% of strings tested — punishingly firm — control at the cost of comfort.

Tension loss 39 % · 66th pct

Sheds more tension than 66% of strings tested.

Energy return 87 % · 34th pct

Livelier than 34% of strings tested.

Spin potential 4.7 · 48th pct

More spin potential than 48% of strings tested.

Ball bite 0.465 COF · 64th pct

Grips the ball harder than 64% of strings tested.

Snapback 0.098 COF · 61st pct

More string-on-string friction than 61% of strings tested.

Strings that play like this

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

Mantis Comfort Poly 16 98% match Wilson Enduro Pro 16 97% match Kirschbaum Pro Line X 17 (1.25) 97% match Dunlop Comfort Poly 17 95% match Tourna Big Hitter Blue 17 95% match Signum Pro Hyperion 16 95% match

More from Signum Pro

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-Plasma 16L against 789 strings Find the right string for me