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Kirschbaum

Pro Line II 1.30

Polyester 1.30 mm In production

Lab measurements for Kirschbaum Pro Line II 1.30, 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

210lb/in

lower = softer, kinder on the arm

Tension loss

48%

lower = stays where you strung it

Energy return

86%

higher = livelier, more free power

Spin potential

5.7

higher = more spin off the string bed

Ball bite

0.444COF

higher = grabs the ball harder

Snapback

0.078COF

lower = strings slide and snap back

How it ranks against all 789 strings

Stiffness 210 lb/in · 79th pct

Stiffer than 79% of strings tested.

Tension loss 48 % · 83rd pct

Sheds more tension than 83% of strings tested.

Energy return 86 % · 25th pct

Livelier than 25% of strings tested.

Spin potential 5.7 · 74th pct

More spin potential than 74% of strings tested.

Ball bite 0.444 COF · 52nd pct

Grips the ball harder than 52% of strings tested.

Snapback 0.078 COF · 19th pct

More string-on-string friction than 19% of strings tested.

Strings that play like this

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

Luxilon ALU Power 125/16L 97% match Prince Tour XC 15L 96% match Dunlop Ice 16 (1.30) 95% match Solinco Outlast 16 95% match Kirschbaum Helix 17 94% match Kirschbaum Super Smash 17 (1.25) 92% match

More from Kirschbaum

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 Pro Line II 1.30 against 789 strings Find the right string for me