Name: Tecnifibre Ruff Code 17 (1.25)
Brand: Tecnifibre

Measured values

Stiffness

208lb/in

lower = softer, kinder on the arm

Tension loss

29%

lower = stays where you strung it

Energy return

90%

higher = livelier, more free power

Spin potential

—

not measured

Ball bite

0.461COF

higher = grabs the ball harder

Snapback

—COF

not measured

How it ranks against all 789 strings

Stiffness 208 lb/in · 75th pct

Stiffer than 75% of strings tested.

Tension loss 29 % · 45th pct

Sheds more tension than 45% of strings tested.

Energy return 90 % · 62nd pct

Livelier than 62% of strings tested.

Ball bite 0.461 COF · 62nd pct

Grips the ball harder than 62% of strings tested.

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.