StringSpec
String finder

Browse all 791

Head to head

IsoSpeed Axon Mono 16L vs L-Tec Premium 5S 16L (1.25)

They split the measurements 3–3. The widest gap is spin potential, where Premium 5S 16L (1.25) is 17 percentile points ahead. Every figure is a testing-machine result at a fixed reference tension.

Measured, side by side

IsoSpeed

Axon Mono 16L

Polyester · 16L ga

L-Tec

Premium 5S 16L (1.25)

Polyester · 16L ga

Stiffness lower = softer, kinder on the arm
20068th pct
21079th pct
Tension loss lower = stays where you strung it
3457th pct
3762nd pct
Energy return higher = livelier, more free power
8953rd pct
8848th pct
Spin potential higher = more spin off the string bed
3.213th pct
4.030th pct
Ball bite higher = grabs the ball harder
0.38314th pct
0.41130th pct
String friction lower = strings slide and snap back
0.11982nd pct
0.10468th pct

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.

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 Axon Mono 16L at 52 lb

String Premium 5S 16L (1.25) at 50.4 lb 22.9 kg

Coming from Premium 5S 16L (1.25) at 52 lb

String Axon Mono 16L at 53.6 lb 24.3 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.

Axon Mono 16L mains / Premium 5S 16L (1.25) crosses

Stiffness72nd pct · 1 measured
Tension loss59th pct · 1 measured
Energy return52nd pct · 1 measured
Spin potential15th pct · 1 measured
Ball bite17th pct · 1 measured
String friction80th pct · 1 measured

Premium 5S 16L (1.25) mains / Axon Mono 16L crosses

Stiffness74th pct · 1 measured
Tension loss60th pct · 1 measured
Energy return50th pct · 1 measured
Spin potential25th pct · 1 measured
Ball bite27th pct · 1 measured
String friction73rd 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.

Axon Mono 16L

~23 hours of play

Premium 5S 16L (1.25)

~21 hours of play

Both strings in full

Every published measurement
StringGaugePriceStiff lb/inLoss %Power %SpinBite COFFriction COF
IsoSpeed Axon Mono 16L Polyester16Lfind20034893.20.3830.119
L-Tec Premium 5S 16L (1.25) Polyester16Lfind21037884.00.4110.104

Add a third string Axon Mono 16L in full Premium 5S 16L (1.25) in full