Name: Head Ultratour 17
Brand: Head

Measured values

Stiffness

208lb/in

lower = softer, kinder on the arm

Tension loss

45%

lower = stays where you strung it

Energy return

85%

higher = livelier, more free power

Spin potential

4.1

higher = more spin off the string bed

Ball bite

0.383COF

higher = grabs the ball harder

Snapback

0.094COF

lower = strings slide and snap back

How it ranks against all 789 strings

Stiffness 208 lb/in · 75th pct

Stiffer than 75% of strings tested.

Tension loss 45 % · 76th pct

Sheds more tension than 76% of strings tested.

Energy return 85 % · 20th pct

Livelier than 20% of strings tested.

Spin potential 4.1 · 32nd pct

More spin potential than 32% of strings tested.

Ball bite 0.383 COF · 14th pct

Grips the ball harder than 14% of strings tested.

Snapback 0.094 COF · 54th pct

More string-on-string friction than 54% of strings tested.

Strings that play like this

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

Luxilon Big Banger Ace 18 (1.12) 97% match Signum Pro Hyperion 17 (1.24) 96% match Luxilon Big Banger Timo 17 (1.22) 95% match Luxilon Big Banger ALU Power Spin 127/16 95% match Luxilon Big Banger XP 125/16L 94% match MSV Focus Evo 17 94% match

More from Head

ETS 16 gauge 16
ETS 17 gauge 17
Fibergel Power 16 gauge 16
Fibergel Power 17 gauge 17
Fibergel Spin 16 gauge 16
FXP 16 gauge 16
FXP 17 gauge 17
FXP Power 16 gauge 16
FXP Power 17 gauge 17
FXP Tour 16 gauge 16
Hawk 16 (1.30) gauge 16
Hawk 17 (1.25) gauge 17

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 Ultratour 17 against 789 strings Find the right string for me