Head to head

Babolat Xcel Power 17 vs Gamma Professional 18 (1.22)

Professional 18 (1.22) leads on 3 of 6 measurements. The widest gap is ball bite, where Professional 18 (1.22) is 44 percentile points ahead. Every figure is a testing-machine result at a fixed reference tension.

Measured, side by side

Babolat

Xcel Power 17

Nylon · 17 ga

Gamma

Professional 18 (1.22)

Nylon · 18 ga

Stiffness lower = softer, kinder on the arm
1469th pct
1243rd pct
Tension loss lower = stays where you strung it
2225th pct
2226th pct
Energy return higher = livelier, more free power
9384th pct
9384th pct
Spin potential higher = more spin off the string bed
3.621st pct
3.927th pct
Ball bite higher = grabs the ball harder
0.37812th pct
0.45056th pct
String friction lower = strings slide and snap back
0.10468th pct
0.11479th 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 Power 17 at 52 lb

String Professional 18 (1.22) at 61.1 lb 27.7 kg

Coming from Professional 18 (1.22) at 52 lb

String Xcel Power 17 at 44.3 lb 20.1 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 Power 17 mains / Professional 18 (1.22) crosses

Stiffness5th pct · 1 measured
Tension loss25th pct · 1 measured
Energy return84th pct · 1 measured
Spin potential22nd pct · 1 measured
Ball bite17th pct · 1 measured
String friction71st pct · 1 measured

Professional 18 (1.22) mains / Xcel Power 17 crosses

Stiffness4th pct · 1 measured
Tension loss25th pct · 1 measured
Energy return84th pct · 1 measured
Spin potential25th pct · 1 measured
Ball bite50th pct · 1 measured
String friction78th 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 Power 17

~33 hours of play

Professional 18 (1.22)

~32 hours of play

Both strings in full

Every published measurement
StringGaugePriceStiff lb/inLoss %Power %SpinBite COFFriction COF
Babolat Xcel Power 17 Nylon17find14622933.60.3780.104
Gamma Professional 18 (1.22) Nylon18find12422933.90.4500.114

Add a third string Xcel Power 17 in full Professional 18 (1.22) in full