ESPN is reporting that the USGA has increased proposed limits on clubhead moment of inertia from 4,750 grams-centimeters squared to 5,900, with a tolerance of 100.
The change was made after manufacturer input and applies to woods and drivers.
Moment of Intertia is a measure of a clubhead’s resistance to twisting. It’s generally achieved by moving weight to the perimeter of a clubhead.
