The fitting reference library
Read the numbers. Understand the context. Choose a better next test.
Practical guides for working fitters: what the measurements tell you, what they leave unanswered, and how to keep the player’s objective in view.
Source-backed educational guide. Fitting suggestions are editorial guidance, not FORJ test results or an expert-approved fitting protocol.
Impact & speed
Club speed describes the club’s motion before impact. Ball speed describes the ball’s motion after it leaves the face. Read them together before deciding why a shot went farther.
Read the guideDriver flight
A spin number is incomplete without launch, ball speed, delivery, and the player’s objective. Lower is not a fitting strategy on its own.
Read the guideClub delivery
Attack angle describes where the clubhead is moving. Dynamic loft describes how the face is oriented. Neither is the ball’s launch angle.
Read the guideApproach flight
Landing angle describes how steeply the ball arrives. It helps assess an approach shot’s suitability, but it does not specify how far the ball will roll after landing.
Read the guideThe whole bag
A club’s distance is useful in relation to the clubs around it. Gapping checks whether the bag provides usable coverage—not whether every club wins a distance comparison.
Read the guideShot patterns
An average describes the centre of a sample. Dispersion describes its spread. Neither is meaningful without knowing which shots were included.
Read the guideDriver impact
A driver’s launch, spin, and curvature depend partly on where the ball meets the face. Read the strike alongside the flight before attributing a result to the head, shaft, or swing.
Read the guideFitting comparisons
A fitting comparison should establish which tested build better serves the player’s objective. It should also make clear what changed, what stayed consistent, and what the session cannot prove.
Read the guideIron specifications
Height and wrist-to-floor measurements can suggest an initial iron specification. The final recommendation needs evidence from how the player delivers the club and where the shots go.
Read the guideBall selection
The club produces a result with the ball being struck. Record that ball, keep it consistent when comparing builds, and evaluate the recommendation with the model the golfer intends to play.
Read the guideDriver specifications
A shorter driver is a candidate to test—not a guaranteed improvement. Evaluate playing length through club speed, ball speed, contact, flight, and dispersion together.
Read the guideBuild measurements
Total weight tells you how much the assembled club weighs. Swingweight describes its static balance on a swingweight scale. Matching one does not mean you have matched the other—or the golfer’s experience.
Read the guideLong-end fitting
Choose the next club to test from the shot the bag needs—not simply the number on the sole or the player’s handicap.
Read the guideLearn about FORJ for your fitting business, or talk with our team about your needs.