Club Build Planner
Estimate swingweight and whole-club MOI before assembly, measure completed clubs, or plan adjustments.
Swingweight planning from components
Measure swingweight with a scale and ruler
Measure from the edge of the grip cap. A few grams or about 1/8 inch of balance-point error can move the result by more than one swingweight point.
Plan a swingweight adjustment
Whole-club MOI planning from components
Measure whole-club MOI with a pendulum
Mount the club at the butt and time many complete cycles. Dividing a 40–50 cycle measurement is much more reliable than timing one swing.
Plan a whole-club MOI adjustment
All results are estimates. Actual values can shift with shaft mass distribution, head CG, lie angle, insertion depth, epoxy, adapter and grip installation.