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Babolat

Synthetic Gut 17 (1.25)

Nylon Gauge 17 1.31 mm In production

Lab measurements for Babolat Synthetic Gut 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

162lb/in

lower = softer, kinder on the arm

Tension loss

17%

lower = stays where you strung it

Energy return

92%

higher = livelier, more free power

Spin potential

6.0

higher = more spin off the string bed

Ball bite

0.422COF

higher = grabs the ball harder

Snapback

0.070COF

lower = strings slide and snap back

How it ranks against all 789 strings

Stiffness 162 lb/in · 29th pct

Stiffer than 29% of strings tested.

Tension loss 17 % · 9th pct

Sheds more tension than 9% of strings tested — outstanding tension maintenance.

Energy return 92 % · 76th pct

Livelier than 76% of strings tested.

Spin potential 6.0 · 79th pct

More spin potential than 79% of strings tested.

Ball bite 0.422 COF · 39th pct

Grips the ball harder than 39% of strings tested.

Snapback 0.070 COF · 5th pct

More string-on-string friction than 5% of strings tested — slides and snaps back freely.

Strings that play like this

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

Babolat Synthetic Gut 16 (1.30) 95% match Wilson NXT Duramax 16 (1.32) 95% match Gamma Synthetic Gut 18 (1.18) 95% match Gosen AK Pro CX 16 (1.30) 94% match Gosen AK Pro Spin 15L (1.38) 94% match Gamma TNT2 18 (1.17) 94% match

More from Babolat

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 Synthetic Gut 17 (1.25) against 789 strings Find the right string for me