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Babolat

RPM Blast Rough 15L

Polyester Gauge 15L 1.35 mm In production

Lab measurements for Babolat RPM Blast Rough 15L, 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

200lb/in

lower = softer, kinder on the arm

Tension loss

37%

lower = stays where you strung it

Energy return

86%

higher = livelier, more free power

Spin potential

7.3

higher = more spin off the string bed

Ball bite

0.523COF

higher = grabs the ball harder

Snapback

0.072COF

lower = strings slide and snap back

How it ranks against all 789 strings

Stiffness 200 lb/in · 68th pct

Stiffer than 68% of strings tested.

Tension loss 37 % · 63rd pct

Sheds more tension than 63% of strings tested.

Energy return 86 % · 31st pct

Livelier than 31% of strings tested.

Spin potential 7.3 · 93rd pct

More spin potential than 93% of strings tested — elite spin generation.

Ball bite 0.523 COF · 85th pct

Grips the ball harder than 85% 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.

Babolat RPM Blast Rough 17 96% match Luxilon ECO Power 17 (1.25) 96% match Diadem Elite XT 16 95% match Luxilon LXN Smart 16L (1.25) 95% match Wilson Revolve 17 (1.25) 94% match Gamma Jet 16L (1.28) 94% match

More from Babolat

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 RPM Blast Rough 15L against 789 strings Find the right string for me