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Kirschbaum

P2 17 (1.25)

Polyester Gauge 17 1.26 mm In production

Lab measurements for Kirschbaum P2 17 (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

236lb/in

lower = softer, kinder on the arm

Tension loss

34%

lower = stays where you strung it

Energy return

90%

higher = livelier, more free power

Spin potential

4.9

higher = more spin off the string bed

Ball bite

0.465COF

higher = grabs the ball harder

Snapback

0.095COF

lower = strings slide and snap back

How it ranks against all 789 strings

Stiffness 236 lb/in · 96th pct

Stiffer than 96% of strings tested — punishingly firm — control at the cost of comfort.

Tension loss 34 % · 56th pct

Sheds more tension than 56% of strings tested.

Energy return 90 % · 60th pct

Livelier than 60% of strings tested.

Spin potential 4.9 · 54th pct

More spin potential than 54% of strings tested.

Ball bite 0.465 COF · 64th pct

Grips the ball harder than 64% of strings tested.

Snapback 0.095 COF · 56th pct

More string-on-string friction than 56% of strings tested.

Strings that play like this

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

Babolat RPM Dual 16 94% match Babolat Hurricane Feel 16 93% match Weiss Cannon Black 5 Edge 17 (1.24) 93% match Pacific Poly Force 17 92% match Tecnifibre Pro Red Code 17 92% match Tecnifibre Pro Red Code 18 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 P2 17 (1.25) against 789 strings Find the right string for me