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Dunlop

S-Gut 17

Nylon/Polyurethane Gauge 17 1.25 mm In production

Lab measurements for Dunlop S-Gut 17, 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

163lb/in

lower = softer, kinder on the arm

Tension loss

21%

lower = stays where you strung it

Energy return

94%

higher = livelier, more free power

Spin potential

3.1

higher = more spin off the string bed

Ball bite

0.406COF

higher = grabs the ball harder

Snapback

0.129COF

lower = strings slide and snap back

How it ranks against all 789 strings

Stiffness 163 lb/in · 31st pct

Stiffer than 31% of strings tested.

Tension loss 21 % · 23rd pct

Sheds more tension than 23% of strings tested.

Energy return 94 % · 90th pct

Livelier than 90% of strings tested.

Spin potential 3.1 · 11th pct

More spin potential than 11% of strings tested.

Ball bite 0.406 COF · 27th pct

Grips the ball harder than 27% of strings tested.

Snapback 0.129 COF · 87th pct

More string-on-string friction than 87% of strings tested.

Strings that play like this

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

Babolat FiberTour 16 97% match Gamma Prodigy 16 96% match Gosen OG Sheep Micro 18 96% match Gosen OG Sheep Micro 17 95% match Gamma Professional Spin 16 95% match Tourna Irradiated 16 95% match

More from Dunlop

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 S-Gut 17 against 789 strings Find the right string for me