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Signum Pro

Poly Megaforce 17 (1.19)

Polyester Gauge 17 1.21 mm In production

Lab measurements for Signum Pro Poly Megaforce 17 (1.19), 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

213lb/in

lower = softer, kinder on the arm

Tension loss

36%

lower = stays where you strung it

Energy return

87%

higher = livelier, more free power

Spin potential

4.8

higher = more spin off the string bed

Ball bite

0.447COF

higher = grabs the ball harder

Snapback

0.093COF

lower = strings slide and snap back

How it ranks against all 789 strings

Stiffness 213 lb/in · 82nd pct

Stiffer than 82% of strings tested.

Tension loss 36 % · 61st pct

Sheds more tension than 61% of strings tested.

Energy return 87 % · 34th pct

Livelier than 34% of strings tested.

Spin potential 4.8 · 51st pct

More spin potential than 51% of strings tested.

Ball bite 0.447 COF · 54th pct

Grips the ball harder than 54% of strings tested.

Snapback 0.093 COF · 52nd pct

More string-on-string friction than 52% of strings tested.

Strings that play like this

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

Kirschbaum Pro Line X 17 (1.25) 97% match Wilson Enduro Pro 16 97% match Pacific X Force 18 96% match Luxilon Alu Power Vibe 16 (1.25) 96% match Tourna Big Hitter Blue 17 95% match Wilson Ripspin 15 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 Megaforce 17 (1.19) against 789 strings Find the right string for me