Double AR

Raptor 1.27

Name: Double AR Raptor 1.27
Brand: Double AR

Polyester 1.27 mm In production

Lab measurements for Double AR Raptor 1.27, 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

238lb/in

lower = softer, kinder on the arm

Tension loss

22%

lower = stays where you strung it

Energy return

90%

higher = livelier, more free power

Spin potential

5.3

higher = more spin off the string bed

Ball bite

0.521COF

higher = grabs the ball harder

Snapback

0.098COF

lower = strings slide and snap back

How it ranks against all 789 strings

Stiffness 238 lb/in · 97th pct

Stiffer than 97% of strings tested — punishingly firm — control at the cost of comfort.

Tension loss 22 % · 27th pct

Sheds more tension than 27% of strings tested.

Energy return 90 % · 58th pct

Livelier than 58% of strings tested.

Spin potential 5.3 · 65th pct

More spin potential than 65% of strings tested.

Ball bite 0.521 COF · 84th pct

Grips the ball harder than 84% of strings tested.

Snapback 0.098 COF · 61st pct

More string-on-string friction than 61% of strings tested.

Strings that play like this

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

Kirschbaum Max Power 17 (1.25) 97% match Solinco Tour Bite 15L (1.35) 94% match Tourna Big HItter Black 7 16 (1.25) 94% match Gamma Zo Verve 16 (1.32) 93% match Kirschbaum Max Power 16 (1.30) 92% match Kirschbaum Max Power Rough 17 (1.25) 92% match

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 Raptor 1.27 against 789 strings Find the right string for me

Measured values

How it ranks against all 789 strings

Strings that play like this

More from Double AR

What these numbers mean