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Tecnifibre

Duramix HD 17

Nylon/Polyester Gauge 17 1.28 mm In production

Lab measurements for Tecnifibre Duramix HD 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

170lb/in

lower = softer, kinder on the arm

Tension loss

32%

lower = stays where you strung it

Energy return

89%

higher = livelier, more free power

Spin potential

1.7

higher = more spin off the string bed

Ball bite

0.391COF

higher = grabs the ball harder

Snapback

0.231COF

lower = strings slide and snap back

How it ranks against all 789 strings

Stiffness 170 lb/in · 38th pct

Stiffer than 38% of strings tested.

Tension loss 32 % · 52nd pct

Sheds more tension than 52% of strings tested.

Energy return 89 % · 57th pct

Livelier than 57% of strings tested.

Spin potential 1.7 · 1st pct

More spin potential than 1% of strings tested — minimal spin generation.

Ball bite 0.391 COF · 18th pct

Grips the ball harder than 18% of strings tested.

Snapback 0.231 COF · 99th pct

More string-on-string friction than 99% of strings tested — notches badly and stays put.

Strings that play like this

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

Wilson NXT Control 16 (1.32) 94% match Tecnifibre Duramix HD 16 92% match Gamma Live Wire 16 91% match IsoSpeed Energetic 17 90% match Wilson Shock Shield 16 90% match Tecnifibre Pro Mix 17 89% match

More from Tecnifibre

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 Duramix HD 17 against 789 strings Find the right string for me