Head to head

Dunlop Synthetic Gut 16 vs Head Fibergel Spin 16

Synthetic Gut 16 leads on 4 of 6 measurements. The widest gap is ball bite, where Synthetic Gut 16 is 17 percentile points ahead. Every figure is a testing-machine result at a fixed reference tension.

Measured, side by side

Dunlop

Synthetic Gut 16

Nylon · 16 ga

Head

Fibergel Spin 16

Nylon · 16 ga

Stiffness lower = softer, kinder on the arm
17341st pct
16937th pct
Tension loss lower = stays where you strung it
2329th pct
2535th pct
Energy return higher = livelier, more free power
9384th pct
9384th pct
Spin potential higher = more spin off the string bed
3.927th pct
3.518th pct
Ball bite higher = grabs the ball harder
0.43145th pct
0.40929th pct
String friction lower = strings slide and snap back
0.11177th pct
0.11781st 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 Synthetic Gut 16 at 52 lb

String Fibergel Spin 16 at 56.1 lb 25.4 kg

Coming from Fibergel Spin 16 at 52 lb

String Synthetic Gut 16 at 48.9 lb 22.2 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.

Synthetic Gut 16 mains / Fibergel Spin 16 crosses

Stiffness39th pct · 1 measured
Tension loss31st pct · 1 measured
Energy return84th pct · 1 measured
Spin potential25th pct · 1 measured
Ball bite42nd pct · 1 measured
String friction78th pct · 1 measured

Fibergel Spin 16 mains / Synthetic Gut 16 crosses

Stiffness38th pct · 1 measured
Tension loss32nd pct · 1 measured
Energy return84th pct · 1 measured
Spin potential19th pct · 1 measured
Ball bite31st pct · 1 measured
String friction80th 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.

Synthetic Gut 16

~31 hours of play

Fibergel Spin 16

~29 hours of play

Both strings in full

Every published measurement
StringGaugePriceStiff lb/inLoss %Power %SpinBite COFFriction COF
Dunlop Synthetic Gut 16 Nylon16find17323933.90.4310.111
Head Fibergel Spin 16 Nylon16find16925933.50.4090.117

Add a third string Synthetic Gut 16 in full Fibergel Spin 16 in full