How the numbers are made

Factory specs

Loft, lie, length and offset are taken from each manufacturer’s official product page. One source per manufacturer:

• Callawaycallawaygolf.com
• Cobracobragolf.com
• Mizunomizunogolf.com
• PINGping.com
• Srixonus.dunlopsports.com
• TaylorMadetaylormadegolf.com
• Titleisttitleist.com

Modeled ball flight

Carry, height, spin, launch and landing angle are computed by GOTRECA’s own physics model (standard projectile motion with drag and Magnus lift). It is calibrated against the publicly shown output of club fitters on YouTube across different iron models at 70–90 mph, used only as plausibility fixtures. Those figures are never shown as GOTRECA’s own numbers and never stored in the database.

Tour benchmark

The single “PGA Tour average” row shown next to a club’s modeled flight is TrackMan’s published PGA Tour Averages table — one row per club number, never the whole table.

trackman.com · retrieved 2026-09-08

Forgiveness rating

The Forgiveness axis of a set’s profile comes from independent robot and tester data, not from GOTRECA’s model: a 0–10 score and a shot-area from MyGolfSpy’s buyers’ guides and “most forgiving irons” articles, and a shot-area from Golf Digest’s robotic-testing analyses. GOTRECA derives its own 0–1 rating from these. The eight sets with no independent test carry a category-and-offset estimate, labeled “modeled” rather than “tested”.

• golfdigest.com
• mygolfspy.com

Shot dispersion

The dispersion top-view is built from a published 7-iron front-to-back dispersion study by GOLFTEC (via golf.com): scratch hcp 0 ≈ 36 ft, hcp 8 ≈ 56 ft, hcp 13 ≈ 90 ft. Bands beyond the study’s sample are extrapolated and labeled as such. This is an iron statistic; the widely quoted “±35 yards” figure is a driver statistic and is not used here.

golf.com · retrieved 2026-09-10

Bring your own numbers

Everything above is modeled or compiled from public sources. A future version of GOTRECA will let you upload your own launch-monitor data instead. There’s nothing to upload yet. Join the list and we’ll email you when it opens.