The USGA occasionally develops new proposals regarding golf equipment. These proposals are submitted to manufacturers or published in press releases. A comment period is allowed before the USGA makes any decision on enacting such proposals.


A Study of the Effect of Rough Height on Tour Player Performance Using U- and V-Grooved Irons

Statistical Analysis of PGA Tour Skill Rankings 1980-2006

Interim Report on Study of Spin Generation

Second Report on Study of Spin Generation

Notice to Manufacturers - Club Adjustability

Notice to Manufacturers - New Groove Regulations

Limit On Clubhead Moment Of Inertia

Procedure For Measuring The Moment Of Inertia Of Golf Clubheads