Head to head
Tecnifibre NRG2 16 vs Tecnifibre XR3 17
NRG2 16 leads on 5 of 6 measurements. The widest gap is ball bite, where NRG2 16 is 12 percentile points ahead. Every figure is a testing-machine result at a fixed reference tension.
Measured, side by side
Bars are percentile against all 791 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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NRG2 16536th
XR3 17584th
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NRG2 16140th
XR3 17171st
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NRG2 16665th
XR3 17630th
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NRG2 16123rd
XR3 17178th
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NRG2 1693rd
XR3 1794th
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NRG2 16617th
XR3 17706th
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NRG2 16109th
XR3 17162nd
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 NRG2 16 at 52 lb
String XR3 17 at 51.3 lb 23.3 kg
Coming from XR3 17 at 52 lb
String NRG2 16 at 52.7 lb 23.9 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.
NRG2 16 mains / XR3 17 crosses
XR3 17 mains / NRG2 16 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.
NRG2 16
~36 hours of play
XR3 17
~37 hours of play
Both strings in full
| String | Gauge | Price | Stiff lb/in | Loss % | Power % | Spin | Bite COF | Friction COF |
|---|---|---|---|---|---|---|---|---|
| Tecnifibre NRG2 16 Nylon | 16 | $14.96 | 158 | 18 | 93 | 3.2 | 0.503 | 0.155 |
| Tecnifibre XR3 17 Nylon/Polyurethane | 17 | find | 161 | 18 | 93 | 3.0 | 0.474 | 0.159 |