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Spin Spec Lab Measurement Bureau · Est. 2009
Journal

Notes From the Roll Room

Putting is where measurement pays back fastest and gets applied least. These six pieces cover the geometry we spend most of our roll room hours on, written for golfers rather than for engineers.

Putter Geometry8 min read

Toe Hang Is Not a Preference

Balance a putter on one finger and watch where the toe settles. That single observation predicts more about whether the club will suit you than the badge on the sole ever will.

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Stroke Mechanics9 min read

Reading Your Stroke Arc

Straight, slight, moderate or strong. How the laser gate classifies an arc, why the class is remarkably stable over years, and what each one demands from the head.

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Putter Geometry7 min read

Lie Angle, the Quietest Error

Two degrees of putter lie shifts where the face points at address, and because the golfer corrects for it unconsciously the miss never gets traced back to the club.

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Setup7 min read

Length Sets Your Eyes

Putter length is not about comfort at address. It determines where your eyes sit relative to the ball, and that governs how accurately you can see and aim a line.

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Putter Geometry6 min read

Hosel Offset and What You See

Full shaft offset, half shaft, or none at all. Offset changes the visual relationship between shaft and face at address, and it changes where your hands want to sit.

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Feel & Pace8 min read

Head Mass Against Green Speed

Why the right head weight for a Bermuda green in July is not the right head weight for the same green in February, and what to do about a putter you cannot swap seasonally.

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Why Only Putting

We Write About What We Measure Most

The roll room generates more surprising findings per hour than any other space in the building, largely because putter specification is so rarely checked. Nearly two thirds of the putters that come through here are mismatched to their owner's measured stroke arc.

So this is where the writing goes. When we have something equally concrete to say about driver mass or wedge bounce we will add it, but we would rather publish six pieces we can support with our own readings than thirty assembled from elsewhere.

Roll Room Data12 mo
Sessions logged146
Hang mismatched63%
Lie outside band48%
Too long41%

Reading Is the Easy Part

Everything on this page becomes considerably more interesting when the numbers being discussed are your own.

Pieces published6
Written byThe bench
Roll room22 ft