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MSV

Co-Focus 17L (1.18)

Polyester Gauge 17L 1.37 mm In production

Lab measurements for MSV Co-Focus 17L (1.18), 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

186lb/in

lower = softer, kinder on the arm

Tension loss

31%

lower = stays where you strung it

Energy return

89%

higher = livelier, more free power

Spin potential

7.2

higher = more spin off the string bed

Ball bite

0.493COF

higher = grabs the ball harder

Snapback

0.068COF

lower = strings slide and snap back

How it ranks against all 789 strings

Stiffness 186 lb/in · 53rd pct

Stiffer than 53% of strings tested.

Tension loss 31 % · 49th pct

Sheds more tension than 49% of strings tested.

Energy return 89 % · 52nd pct

Livelier than 52% of strings tested.

Spin potential 7.2 · 92nd pct

More spin potential than 92% of strings tested — elite spin generation.

Ball bite 0.493 COF · 75th pct

Grips the ball harder than 75% of strings tested.

Snapback 0.068 COF · 3rd pct

More string-on-string friction than 3% of strings tested — slides and snaps back freely.

Strings that play like this

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

Volkl Cyclone 19 (1.10) 96% match Volkl Cyclone 18L (1.15) 96% match Diadem Solstice Pro 16L (1.25) 96% match Solinco Hyper-G 18 (1.15) 95% match Diadem Elite XT 17 95% match Diadem Solstice Pro 15L (1.35) 95% match

More from MSV

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 Co-Focus 17L (1.18) against 789 strings Find the right string for me