Cobra BiO Cell vs Cobra Fly-Z

Side-by-side factory specifications. Differing values are highlighted.

Cobra BiO Cell2013–2014 · Game Improvement Ironsinvestment cast deep-undercut cavity back with tungsten weighting · stainless steel with tungsten weights in the heel and toe of the long and mid irons and behind the face in the short irons Cobra Fly-Z2014–2015 · Game Improvement Ironsinvestment cast undercut cavity back with welded face insert · 17-4 stainless steel body with a high-strength 455 stainless steel face insert

Specification comparison

Club	BiO Cell loft	Fly-Z loft	BiO Cell lie	Fly-Z lie	BiO Cell length	Fly-Z length
3	18	17	60	60	40	40
4	20	19	61	61	39.25	39.25
5	23	23	61.5	61.5	38.5	38.5
6	26.5	26.75	62	62	37.75	37.75
7	30.5	30.5	62.5	62.5	37.25	37.25
8	35	35.25	63	63	36.75	36.75
9	40	40	63.5	63.5	36.25	36.25
PW	45	45	64	64	36	36
GW	50	50	64	64	35.75	35.75
SW	55	55	64	64	35.5	35.5
LW	60	60	64	64	35.5	35.5

Highlighted cells differ between the two sets. Lofts and lies are factory standard.

Lofts compared

BiO Cell
Fly-Z

Lofts differ on 4 of the 11 clubs the two sets share. A lower point is a stronger loft.

What the differences mean

At the 7-iron, the BiO Cell is 30.5° and the Fly-Z is 30.5°, identical at the club most golfers compare on, although other clubs in the sets differ. Across the 11 clubs both sets share, the differences roughly cancel out, with the largest gap at the 3-iron (18° vs 17°).

Both are game improvement irons, built for roughly 10 to 25 handicaps. Perimeter-weighted cavity backs with wider soles, more offset and stronger lofts, aimed at mid handicaps. Because they target the same golfer, the decision comes down to the specific loft, feel and shaping differences rather than who the sets are made for.

The BiO Cell is listed as investment cast deep-undercut cavity back with tungsten weighting and the Fly-Z as investment cast undercut cavity back with welded face insert. The BiO Cell adds tungsten weighting, which lowers the centre of gravity and raises stability on mis-hits, helping the long irons launch.

The Fly-Z arrived 1 year after the BiO Cell, a typical one-generation refresh. Changes over that span are usually incremental: refined face thickness, revised weighting, updated looks and small loft tweaks rather than a new concept.

Which should you choose?

Loft differences between the BiO Cell and Fly-Z run in both directions rather than shifting the whole set one way, so the choice comes down to shaping, feel and gapping at the ends of the set rather than outright distance.

Both charts are reproduced in full on their own pages: Cobra BiO Cell specs and Cobra Fly-Z specs.

Frequently asked questions

Is the Cobra BiO Cell stronger lofted than the Fly-Z?

Not at the 7-iron, where both are 30.5°. Other clubs in the sets differ, so compare the full table above.

What is the loft difference between the Cobra BiO Cell and Fly-Z?

At the 7-iron the difference is 0° (30.5° vs 30.5°). The largest gap on a shared club is 1° at the 3-iron, and 4 of the 11 shared clubs differ.

Are the Cobra BiO Cell and Fly-Z aimed at the same golfer?

Yes. Both are game improvement irons, built for roughly 10 to 25 handicaps. Choose on feel, looks and gapping, ideally after hitting both.

Do the Cobra BiO Cell and Fly-Z have the same lie and length?

At the 7-iron, yes: both are 62.5° lie and 37.25 inches long.

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