StringSpec
String finder

Browse all 789

Dunlop

Black Widow 16

Polyester Gauge 16 1.31 mm In production

Lab measurements for Dunlop Black Widow 16, 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

193lb/in

lower = softer, kinder on the arm

Tension loss

38%

lower = stays where you strung it

Energy return

87%

higher = livelier, more free power

Spin potential

5.2

higher = more spin off the string bed

Ball bite

0.557COF

higher = grabs the ball harder

Snapback

0.107COF

lower = strings slide and snap back

How it ranks against all 789 strings

Stiffness 193 lb/in · 61st pct

Stiffer than 61% of strings tested.

Tension loss 38 % · 64th pct

Sheds more tension than 64% of strings tested.

Energy return 87 % · 39th pct

Livelier than 39% of strings tested.

Spin potential 5.2 · 62nd pct

More spin potential than 62% of strings tested.

Ball bite 0.557 COF · 91st pct

Grips the ball harder than 91% of strings tested — bites the ball hard through the brush.

Snapback 0.107 COF · 72nd pct

More string-on-string friction than 72% of strings tested.

Strings that play like this

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

Babolat RPM Blast 18 (1.20) 97% match Signum Pro Poly-Plasma 17L (1.18) 95% match SuperString Viper V2 Rough 16L 95% match Luxilon ALU Power Feel 18/1.20 94% match Yonex Poly Tour Pro 17 (1.20) 94% match Head Sonic Pro Edge 16 94% 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 Black Widow 16 against 789 strings Find the right string for me