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Bend, OR · High Desert Fitting Bay
CG Match Lab Center-of-Gravity Fitting Studio
Fitting Services / Iron

Iron Fitting

Most iron fittings stop at lie, loft, and length. We add a fourth variable — how CG placement steps from long iron to short iron — because an inconsistent progression is a common, invisible source of gapping trouble.

What We Capture

A CG Reading on Every Club in the Set

We run each iron across the balance fixture individually, not just the model as a whole, since CG placement can drift slightly club to club even within one manufacturer's line. That reading gets compared against your delivered loft and attack angle from the launch monitor.

A set with a clean, predictable CG progression tends to produce evenly stepped trajectories. A set that jumps around — often the case when mixing a blended set across two different model lines — usually shows up as an unpredictable flight window somewhere in the middle irons.

Iron Session Data Points
CG Progressionrig reading, per club
Lie Angledegrees, per club
Dynamic Loftdegrees, per club
Carry Gappingyards, per club
Shaft FrequencyCPM, per club
The Variables

What Actually Changes in an Iron Fitting

Cavity Depth

Deeper cavity backs pull CG lower and further back for forgiveness; shallower blade-style cavities raise CG for more workability and feedback.

Lie Angle

An upright or flat lie angle changes strike direction independent of CG, but the two interact once you're looking at consistent gapping across a set.

Length & Swingweight

A quarter-inch length change shifts feel and delivered loft together; we recheck swingweight after any adjustment so it never drifts unnoticed.

Shaft Frequency Step

Consistent CPM stepping from long iron to short iron keeps feel even, which matters as much as the CG progression itself.

Set Makeup

Where irons stop and hybrids or wedges take over is part of the fitting — not every golfer needs a 4-iron just because the set came with one.

Grip Diameter

Grip size affects hand action and can quietly change face angle at impact across an entire set, not just one club.

See Your Own Set's CG Progression

Bring your current irons and we'll rig-test the full set alongside demo alternatives.