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Poly Star

Classic 17 (1.20)

Polyester Gauge 17 1.22 mm In production

Lab measurements for Poly Star Classic 17 (1.20), 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

167lb/in

lower = softer, kinder on the arm

Tension loss

62%

lower = stays where you strung it

Energy return

79%

higher = livelier, more free power

Spin potential

4.0

higher = more spin off the string bed

Ball bite

0.362COF

higher = grabs the ball harder

Snapback

0.090COF

lower = strings slide and snap back

How it ranks against all 789 strings

Stiffness 167 lb/in · 35th pct

Stiffer than 35% of strings tested.

Tension loss 62 % · 98th pct

Sheds more tension than 98% of strings tested — goes dead fast, expect frequent restringing.

Energy return 79 % · 1st pct

Livelier than 1% of strings tested — very muted and low-powered.

Spin potential 4.0 · 30th pct

More spin potential than 30% of strings tested.

Ball bite 0.362 COF · 6th pct

Grips the ball harder than 6% of strings tested — slick against the ball.

Snapback 0.090 COF · 46th pct

More string-on-string friction than 46% of strings tested.

Strings that play like this

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

Poly Star Energy 17 (1.20) 99% match Polyfibre TCS 16L 97% match Poly Star Energy 16 (1.30) 97% match Polyfibre Poly Hightec 16/1.30 96% match Poly Star Energy 16L (1.25) 96% match Polyfibre Hightec Premium 16/1.30 95% 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 Classic 17 (1.20) against 789 strings Find the right string for me