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Polyfibre

TCS 18 (1.15)

Polyester Gauge 18 1.16 mm In production

Lab measurements for Polyfibre TCS 18 (1.15), 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

156lb/in

lower = softer, kinder on the arm

Tension loss

61%

lower = stays where you strung it

Energy return

81%

higher = livelier, more free power

Spin potential

—

not measured

Ball bite

—COF

not measured

Snapback

—COF

not measured

How it ranks against all 789 strings

Stiffness 156 lb/in · 19th pct

Stiffer than 19% of strings tested.

Tension loss 61 % · 98th pct

Sheds more tension than 98% of strings tested — goes dead fast, expect frequent restringing.

Energy return 81 % · 5th pct

Livelier than 5% of strings tested — very muted and low-powered.

More from Polyfibre

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 TCS 18 (1.15) against 789 strings Find the right string for me