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Tourna

Irradiated 17

Nylon Gauge 17 1.33 mm In production

Lab measurements for Tourna Irradiated 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

154lb/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

5.4

higher = more spin off the string bed

Ball bite

0.472COF

higher = grabs the ball harder

Snapback

0.088COF

lower = strings slide and snap back

How it ranks against all 789 strings

Stiffness 154 lb/in · 16th pct

Stiffer than 16% 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 5.4 · 67th pct

More spin potential than 67% of strings tested.

Ball bite 0.472 COF · 67th pct

Grips the ball harder than 67% of strings tested.

Snapback 0.088 COF · 42nd pct

More string-on-string friction than 42% of strings tested.

Strings that play like this

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

Babolat SpiralTek 17 96% match Wilson NXT Power 17 (1.26) 95% match Prince Lightning Pro 16 (1.30) 95% match Tourna Quasi-Gut Armor 17 94% match Gamma TNT2 Tour 16 (1.32) 94% match Wilson NXT Duramax 16 (1.32) 93% match

More from Tourna

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 Irradiated 17 against 789 strings Find the right string for me