Head to head

MSV Hepta-Twist 17 vs Volkl Cyclone 17

Cyclone 17 leads on 5 of 6 measurements. The widest gap is stiffness, where Hepta-Twist 17 is 11 percentile points ahead. Every figure is a testing-machine result at a fixed reference tension.

Measured, side by side

MSV

Hepta-Twist 17

Polyester · 17 ga

Volkl

Cyclone 17

Polyester · 17 ga

Stiffness lower = softer, kinder on the arm
18148th pct
19258th pct
Tension loss lower = stays where you strung it
5088th pct
4885th pct
Energy return higher = livelier, more free power
8414th pct
8516th pct
Spin potential higher = more spin off the string bed
5.773rd pct
5.876th pct
Ball bite higher = grabs the ball harder
0.48271st pct
0.48873rd pct
String friction lower = strings slide and snap back
0.08534th pct
0.08432nd 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 Hepta-Twist 17 at 52 lb

String Cyclone 17 at 48.4 lb 22.0 kg

Coming from Cyclone 17 at 52 lb

String Hepta-Twist 17 at 54.8 lb 24.9 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.

Hepta-Twist 17 mains / Cyclone 17 crosses

Stiffness52nd pct · 1 measured
Tension loss87th pct · 1 measured
Energy return15th pct · 1 measured
Spin potential74th pct · 1 measured
Ball bite71st pct · 1 measured
String friction33rd pct · 1 measured

Cyclone 17 mains / Hepta-Twist 17 crosses

Stiffness55th pct · 1 measured
Tension loss87th pct · 1 measured
Energy return16th pct · 1 measured
Spin potential74th pct · 1 measured
Ball bite73rd pct · 1 measured
String friction33rd 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.

Hepta-Twist 17

~14 hours of play

Cyclone 17

~15 hours of play

Both strings in full

Every published measurement
StringGaugePriceStiff lb/inLoss %Power %SpinBite COFFriction COF
MSV Hepta-Twist 17 Polyester17find18150845.70.4820.085
Volkl Cyclone 17 Polyester17$9.9919248855.80.4880.084

Add a third string Hepta-Twist 17 in full Cyclone 17 in full