Name: Tecnifibre Black Code 4S 18 (1.20)
Brand: Tecnifibre

Measured values

Stiffness

210lb/in

lower = softer, kinder on the arm

Tension loss

25%

lower = stays where you strung it

Energy return

88%

higher = livelier, more free power

Spin potential

6.1

higher = more spin off the string bed

Ball bite

0.532COF

higher = grabs the ball harder

Snapback

0.087COF

lower = strings slide and snap back

How it ranks against all 789 strings

Stiffness 210 lb/in · 80th pct

Stiffer than 80% of strings tested.

Tension loss 25 % · 37th pct

Sheds more tension than 37% of strings tested.

Energy return 88 % · 50th pct

Livelier than 50% of strings tested.

Spin potential 6.1 · 81st pct

More spin potential than 81% of strings tested.

Ball bite 0.532 COF · 87th pct

Grips the ball harder than 87% of strings tested.

Snapback 0.087 COF · 39th pct

More string-on-string friction than 39% of strings tested.

Strings that play like this

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

Yonex Poly Tour Spin 16L (1.25) 97% match Tecnifibre Razor Code 18 (1.20) 95% match Tourna Big HItter Silver 16 95% match Solinco Hyper-G 16L (1.25) 94% match Topspin Cyber Whirl 17 (1.24) 94% match Solinco Outlast 16L (1.25) 94% match

More from Tecnifibre

Black Code 4S 16 (1.30) gauge 16
Black Code 4S 17 (1.25) gauge 17
Black Code 15L (1.32) gauge 15L
Black Code 16 gauge 16
Black Code 17 gauge 17
Black Code 18 gauge 18
Duramix HD 16 gauge 16
Duramix HD 17 gauge 17
E-Matrix 16 gauge 16
E-Matrix 17 gauge 17
HDX Tour 16 (1.30) gauge 16
HDX Tour 17 (1.24) gauge 17

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 Code 4S 18 (1.20) against 789 strings Find the right string for me