Head to head

Babolat M7 16 (1.30) vs Gamma Synthtic Gut 15L W/wearguard (1.38)

M7 16 (1.30) leads on 3 of 6 measurements. The widest gap is stiffness, where M7 16 (1.30) is 9 percentile points ahead. Every figure is a testing-machine result at a fixed reference tension.

Measured, side by side

Babolat

M7 16 (1.30)

Nylon · 16 ga

Gamma

Synthtic Gut 15L W/wearguard (1.38)

Nylon · 15L ga

Stiffness lower = softer, kinder on the arm
16126th pct
16736th pct
Tension loss lower = stays where you strung it
1913th pct
178th pct
Energy return higher = livelier, more free power
9386th pct
9384th pct
Spin potential higher = more spin off the string bed
4.748th pct
4.748th pct
Ball bite higher = grabs the ball harder
0.47267th pct
0.46865th pct
String friction lower = strings slide and snap back
0.10063rd pct
0.09962nd 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 M7 16 (1.30) at 52 lb

String Synthtic Gut 15L W/wearguard (1.38) at 49.9 lb 22.6 kg

Coming from Synthtic Gut 15L W/wearguard (1.38) at 52 lb

String M7 16 (1.30) at 54.2 lb 24.6 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.

M7 16 (1.30) mains / Synthtic Gut 15L W/wearguard (1.38) crosses

Stiffness30th pct · 1 measured
Tension loss12th pct · 1 measured
Energy return86th pct · 1 measured
Spin potential48th pct · 1 measured
Ball bite66th pct · 1 measured
String friction62nd pct · 1 measured

Synthtic Gut 15L W/wearguard (1.38) mains / M7 16 (1.30) crosses

Stiffness32nd pct · 1 measured
Tension loss10th pct · 1 measured
Energy return86th pct · 1 measured
Spin potential48th pct · 1 measured
Ball bite65th pct · 1 measured
String friction62nd 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.

M7 16 (1.30)

~36 hours of play

Synthtic Gut 15L W/wearguard (1.38)

~38 hours of play

Both strings in full

Every published measurement
StringGaugePriceStiff lb/inLoss %Power %SpinBite COFFriction COF
Babolat M7 16 (1.30) Nylon16find16119934.70.4720.100
Gamma Synthtic Gut 15L W/wearguard (1.38) Nylon15Lfind16717934.70.4680.099

Add a third string M7 16 (1.30) in full Synthtic Gut 15L W/wearguard (1.38) in full