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Poly Star

Energy 16L (1.25)

Polyester Gauge 16L 1.25 mm In production

Lab measurements for Poly Star Energy 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

170lb/in

lower = softer, kinder on the arm

Tension loss

68%

lower = stays where you strung it

Energy return

76%

higher = livelier, more free power

Spin potential

3.7

higher = more spin off the string bed

Ball bite

0.354COF

higher = grabs the ball harder

Snapback

0.096COF

lower = strings slide and snap back

How it ranks against all 789 strings

Stiffness 170 lb/in · 38th pct

Stiffer than 38% of strings tested.

Tension loss 68 % · 100th pct

Sheds more tension than 100% of strings tested — goes dead fast, expect frequent restringing.

Energy return 76 % · 0th pct

Livelier than 0% of strings tested — very muted and low-powered.

Spin potential 3.7 · 23rd pct

More spin potential than 23% of strings tested.

Ball bite 0.354 COF · 3rd pct

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

Snapback 0.096 COF · 57th pct

More string-on-string friction than 57% of strings tested.

Strings that play like this

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

Polyfibre TCS 16L 98% match Poly Star Energy 16 (1.30) 96% match Poly Star Classic 17 (1.20) 96% match Poly Star Energy 17 (1.20) 96% match Polyfibre Poly Hightec 16/1.30 95% match Prince Poly Spin 3D 94% match

More from Poly Star

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 Energy 16L (1.25) against 789 strings Find the right string for me