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Gamma

Zo Black Ice 17 (1.23)

Polyester Gauge 17 1.23 mm In production

Lab measurements for Gamma Zo Black Ice 17 (1.23), 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

212lb/in

lower = softer, kinder on the arm

Tension loss

41%

lower = stays where you strung it

Energy return

87%

higher = livelier, more free power

Spin potential

3.7

higher = more spin off the string bed

Ball bite

0.402COF

higher = grabs the ball harder

Snapback

0.110COF

lower = strings slide and snap back

How it ranks against all 789 strings

Stiffness 212 lb/in · 80th pct

Stiffer than 80% of strings tested.

Tension loss 41 % · 69th pct

Sheds more tension than 69% of strings tested.

Energy return 87 % · 39th pct

Livelier than 39% of strings tested.

Spin potential 3.7 · 23rd pct

More spin potential than 23% of strings tested.

Ball bite 0.402 COF · 25th pct

Grips the ball harder than 25% of strings tested.

Snapback 0.110 COF · 76th pct

More string-on-string friction than 76% of strings tested.

Strings that play like this

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

Weiss Cannon MatchPower 1.25 95% match Gamma Monoblast 16 95% match Tourna Big Hitter Blue Rough 16 94% match L-Tec Premium 5S 16L (1.25) 93% match Luxilon Adrenaline 16 93% match Prince Beast XP 16 93% match

More from Gamma

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 Zo Black Ice 17 (1.23) against 789 strings Find the right string for me