Signum Pro

Yellow Jacket 17g (1.22)

Name: Signum Pro Yellow Jacket 17g (1.22)
Brand: Signum Pro

Polyester Gauge 17 1.26 mm In production

Lab measurements for Signum Pro Yellow Jacket 17g (1.22), 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

198lb/in

lower = softer, kinder on the arm

Tension loss

33%

lower = stays where you strung it

Energy return

88%

higher = livelier, more free power

Spin potential

6.3

higher = more spin off the string bed

Ball bite

0.614COF

higher = grabs the ball harder

Snapback

0.097COF

lower = strings slide and snap back

How it ranks against all 789 strings

Stiffness 198 lb/in · 66th pct

Stiffer than 66% of strings tested.

Tension loss 33 % · 52nd pct

Sheds more tension than 52% of strings tested.

Energy return 88 % · 50th pct

Livelier than 50% of strings tested.

Spin potential 6.3 · 84th pct

More spin potential than 84% of strings tested.

Ball bite 0.614 COF · 96th pct

Grips the ball harder than 96% of strings tested — bites the ball hard through the brush.

Snapback 0.097 COF · 59th pct

More string-on-string friction than 59% of strings tested.

Strings that play like this

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

Gamma Moto Soft 16 (1.29) 97% match Gamma IO Soft 16 (1.28) 97% match Head Hawk 18 (1.20) 96% match Solinco Revolution 18 (1.16) 95% match Luxilon Alu Power Soft 1.25 95% match Luxilon Element Rough 16 (1.30) 94% 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 Yellow Jacket 17g (1.22) 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 Signum Pro

What these numbers mean