Name: Tecnifibre NRG2 18 (1.18)
Brand: Tecnifibre

Measured values

Stiffness

151lb/in

lower = softer, kinder on the arm

Tension loss

20%

lower = stays where you strung it

Energy return

93%

higher = livelier, more free power

Spin potential

2.6

higher = more spin off the string bed

Ball bite

0.514COF

higher = grabs the ball harder

Snapback

0.198COF

lower = strings slide and snap back

How it ranks against all 789 strings

Stiffness 151 lb/in · 14th pct

Stiffer than 14% of strings tested.

Tension loss 20 % · 18th pct

Sheds more tension than 18% of strings tested.

Energy return 93 % · 78th pct

Livelier than 78% of strings tested.

Spin potential 2.6 · 5th pct

More spin potential than 5% of strings tested — minimal spin generation.

Ball bite 0.514 COF · 82nd pct

Grips the ball harder than 82% of strings tested.

Snapback 0.198 COF · 98th pct

More string-on-string friction than 98% of strings tested — notches badly and stays put.

Strings that play like this

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

Babolat Addiction 17 97% match Head ETS 17 97% match Babolat Xcel 16 96% match Gamma Ocho XP 16 (1.32) 96% match Tecnifibre Multi-Feel 17 (1.25) 96% match Tecnifibre E-Matrix 17 95% match

More from Tecnifibre

Black Code 4S 16 (1.30) gauge 16
Black Code 4S 17 (1.25) gauge 17
Black Code 4S 18 (1.20) gauge 18
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

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 NRG2 18 (1.18) against 789 strings Find the right string for me