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Diadem

Solstice Power 15L (1.35)

Polyester Gauge 15L 1.35 mm In production

Lab measurements for Diadem Solstice Power 15L (1.35), 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

229lb/in

lower = softer, kinder on the arm

Tension loss

30%

lower = stays where you strung it

Energy return

89%

higher = livelier, more free power

Spin potential

7.1

higher = more spin off the string bed

Ball bite

0.508COF

higher = grabs the ball harder

Snapback

0.072COF

lower = strings slide and snap back

How it ranks against all 789 strings

Stiffness 229 lb/in · 93rd pct

Stiffer than 93% of strings tested — punishingly firm — control at the cost of comfort.

Tension loss 30 % · 48th pct

Sheds more tension than 48% of strings tested.

Energy return 89 % · 55th pct

Livelier than 55% of strings tested.

Spin potential 7.1 · 91st pct

More spin potential than 91% of strings tested — elite spin generation.

Ball bite 0.508 COF · 81st pct

Grips the ball harder than 81% of strings tested.

Snapback 0.072 COF · 7th pct

More string-on-string friction than 7% of strings tested — slides and snaps back freely.

Strings that play like this

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

MSV Focus-Hex 16 (1.23) 96% match Grapplesnake Alpha 17 (1.25) 96% match Solinco Hyper-G 16 Round (1.30) 95% match MSV Focus Hex 17L (1.18) 95% match Solinco Hyper-G 16 95% match Head Hawk 16 (1.30) 95% match

More from Diadem

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 Solstice Power 15L (1.35) against 789 strings Find the right string for me