Head to head

Babolat Xcel French Open Black 16 vs Head Velocity MLT 17 (1.25)

Xcel French Open Black 16 leads on 4 of 6 measurements. The widest gap is snapback, where Velocity MLT 17 (1.25) is 20 percentile points ahead. Every figure is a testing-machine result at a fixed reference tension.

Measured, side by side

Babolat

Xcel French Open Black 16

Nylon · 16 ga

Head

Velocity MLT 17 (1.25)

Nylon · 17 ga

Stiffness lower = softer, kinder on the arm
1458th pct
15316th pct
Tension loss lower = stays where you strung it
132nd pct
154th pct
Energy return higher = livelier, more free power
9596th pct
9492nd pct
Spin potential higher = more spin off the string bed
5.262nd pct
5.569th pct
Ball bite higher = grabs the ball harder
0.48170th pct
0.45961st pct
Snapback lower = strings slide and snap back
0.09250th pct
0.08330th pct

Bars are percentile against all 788 strings, and the marked side is the one that measures better — which is not always the one you want. A firmer bed is worse for your elbow and better for your control, and no measurement knows which of those you came for.

Which one wins, by problem

Each string's standing on the site's rankings, out of every measured string in the database. This is where a comparison stops being arithmetic and starts being a decision.

Swapping between them: what tension?

Bed stiffness is published at one reference tension, so the only honest conversion is to scale it. These are starting points from 52 lb, not prescriptions — the calculator takes your own tension.

Coming from Xcel French Open Black 16 at 52 lb

String Velocity MLT 17 (1.25) at 49.1 lb 22.3 kg

Coming from Velocity MLT 17 (1.25) at 52 lb

String Xcel French Open Black 16 at 55.1 lb 25.0 kg

Hybrid: what if you used both?

Estimated, not measured. No hybrid combination has been tested as a bed — these figures are the two strings' own lab measurements weighted by how much of the bed each one actually is. Treat them as a guide to which way a pairing moves, never as lab data.

Xcel French Open Black 16 mains / Velocity MLT 17 (1.25) crosses

Stiffness11th pct · 1 measured
Tension loss3rd pct · 1 measured
Energy return95th pct · 1 measured
Spin potential64th pct · 1 measured
Ball bite69th pct · 1 measured
Snapback45th pct · 1 measured

Velocity MLT 17 (1.25) mains / Xcel French Open Black 16 crosses

Stiffness13th pct · 1 measured
Tension loss3rd pct · 1 measured
Energy return94th pct · 1 measured
Spin potential68th pct · 1 measured
Ball bite63rd pct · 1 measured
Snapback35th pct · 1 measured

Open this in the hybrid builder

Which goes dead first?

Estimated from tension loss, which is the only thing the database measures about ageing. This is when the bed stops playing the way you strung it — not when the string breaks.

Xcel French Open Black 16

~39 hours of play

Velocity MLT 17 (1.25)

~39 hours of play

Both strings in full

Every published measurement
StringGaugeStiff lb/inLoss %Power %SpinBite COFSnap COF
Babolat Xcel French Open Black 16 Nylon1614513955.20.4810.092
Head Velocity MLT 17 (1.25) Nylon1715315945.50.4590.083

Add a third string Xcel French Open Black 16 in full Velocity MLT 17 (1.25) in full