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Signum Pro

Plasma HEXtreme 16L/1.25

Polyester Gauge 16L 1.24 mm In production

Lab measurements for Signum Pro Plasma HEXtreme 16L/1.25, 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

205lb/in

lower = softer, kinder on the arm

Tension loss

42%

lower = stays where you strung it

Energy return

86%

higher = livelier, more free power

Spin potential

5.9

higher = more spin off the string bed

Ball bite

0.451COF

higher = grabs the ball harder

Snapback

0.076COF

lower = strings slide and snap back

How it ranks against all 789 strings

Stiffness 205 lb/in · 73rd pct

Stiffer than 73% of strings tested.

Tension loss 42 % · 69th pct

Sheds more tension than 69% of strings tested.

Energy return 86 % · 29th pct

Livelier than 29% of strings tested.

Spin potential 5.9 · 78th pct

More spin potential than 78% of strings tested.

Ball bite 0.451 COF · 56th pct

Grips the ball harder than 56% of strings tested.

Snapback 0.076 COF · 15th pct

More string-on-string friction than 15% of strings tested.

Strings that play like this

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

IsoSpeed Black Fire 17 96% match Genesis Black Magic 16 (1.29) 95% match Prince Tour XR 17 (1.25) 95% match Luxilon LXN Smart 16L (1.25) 94% match Dunlop Ice 16 (1.30) 94% match Kirschbaum Helix 17 93% 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 Plasma HEXtreme 16L/1.25 against 789 strings Find the right string for me