Head to head

MSV Co-Focus 17L (1.18) vs Solinco Hyper-G 18 (1.15)

Hyper-G 18 (1.15) leads on 4 of 6 measurements. The widest gap is string friction, where Co-Focus 17L (1.18) is 26 percentile points ahead. Every figure is a testing-machine result at a fixed reference tension.

Measured, side by side

MSV

Co-Focus 17L (1.18)

Polyester · 17L ga

Solinco

Hyper-G 18 (1.15)

Polyester · 18 ga

Stiffness lower = softer, kinder on the arm
18653rd pct
18046th pct
Tension loss lower = stays where you strung it
3149th pct
2844th pct
Energy return higher = livelier, more free power
8952nd pct
8850th pct
Spin potential higher = more spin off the string bed
7.292nd pct
7.595th pct
Ball bite higher = grabs the ball harder
0.49375th pct
0.61797th pct
String friction lower = strings slide and snap back
0.0683rd pct
0.08228th pct

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.

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 Co-Focus 17L (1.18) at 52 lb

String Hyper-G 18 (1.15) at 53.6 lb 24.3 kg

Coming from Hyper-G 18 (1.15) at 52 lb

String Co-Focus 17L (1.18) at 50.4 lb 22.9 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.

Co-Focus 17L (1.18) mains / Hyper-G 18 (1.15) crosses

Stiffness50th pct · 1 measured
Tension loss48th pct · 1 measured
Energy return51st pct · 1 measured
Spin potential92nd pct · 1 measured
Ball bite82nd pct · 1 measured
String friction6th pct · 1 measured

Hyper-G 18 (1.15) mains / Co-Focus 17L (1.18) crosses

Stiffness48th pct · 1 measured
Tension loss46th pct · 1 measured
Energy return51st pct · 1 measured
Spin potential94th pct · 1 measured
Ball bite95th pct · 1 measured
String friction19th 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.

Co-Focus 17L (1.18)

~25 hours of play

Hyper-G 18 (1.15)

~27 hours of play

Both strings in full

Every published measurement
StringGaugePriceStiff lb/inLoss %Power %SpinBite COFFriction COF
MSV Co-Focus 17L (1.18) Polyester17Lfind18631897.20.4930.068
Solinco Hyper-G 18 (1.15) Polyester18$13.9918028887.50.6170.082

Add a third string Co-Focus 17L (1.18) in full Hyper-G 18 (1.15) in full