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
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.
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Xcel Power 17603rd
Professional 18 (1.22)488th
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Xcel Power 1765th
Professional 18 (1.22)29th
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Xcel Power 17733rd
Professional 18 (1.22)758th
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Xcel Power 1774th
Professional 18 (1.22)55th
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Xcel Power 17182nd
Professional 18 (1.22)189th
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Xcel Power 17647th
Professional 18 (1.22)708th
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Xcel Power 1776th
Professional 18 (1.22)59th
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
Professional 18 (1.22) mains / Xcel Power 17 crosses
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
| String | Gauge | Price | Stiff lb/in | Loss % | Power % | Spin | Bite COF | Friction COF |
|---|---|---|---|---|---|---|---|---|
| Babolat Xcel Power 17 Nylon | 17 | find | 146 | 22 | 93 | 3.6 | 0.378 | 0.104 |
| Gamma Professional 18 (1.22) Nylon | 18 | find | 124 | 22 | 93 | 3.9 | 0.450 | 0.114 |
Add a third string Xcel Power 17 in full Professional 18 (1.22) in full