StringSpec
String finder

Browse all 789

Gosen

Polylon SP 17 (1.24)

Polyester Gauge 17 1.25 mm In production

Lab measurements for Gosen Polylon SP 17 (1.24), 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

175lb/in

lower = softer, kinder on the arm

Tension loss

52%

lower = stays where you strung it

Energy return

85%

higher = livelier, more free power

Spin potential

4.6

higher = more spin off the string bed

Ball bite

0.399COF

higher = grabs the ball harder

Snapback

0.087COF

lower = strings slide and snap back

How it ranks against all 789 strings

Stiffness 175 lb/in · 43rd pct

Stiffer than 43% of strings tested.

Tension loss 52 % · 92nd pct

Sheds more tension than 92% of strings tested — goes dead fast, expect frequent restringing.

Energy return 85 % · 24th pct

Livelier than 24% of strings tested.

Spin potential 4.6 · 45th pct

More spin potential than 45% of strings tested.

Ball bite 0.399 COF · 23rd pct

Grips the ball harder than 23% of strings tested.

Snapback 0.087 COF · 39th pct

More string-on-string friction than 39% of strings tested.

Strings that play like this

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

Gosen Polymaster I 16 94% match MSV Co.-Focus 16L 93% match Topspin Cyber Flash 16 92% match Gosen Polymaster II 16 92% match Kirschbaum Pro Line I 18L (1.15) 92% match Poly Star Classic 16L (1.25) 91% match

More from Gosen

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 Polylon SP 17 (1.24) against 789 strings Find the right string for me