The putting green bobble test in practice

This chart shows almost a full season of bobble test measurements from Hazeltine National GC. I discussed measurements of smoothness and trueness of ball roll in this video, and I mentioned that I use and recommend the bobble test as a way to make these measurements.

Five different ways to measure smoothness and trueness of golf ball roll on putting greens

When Cam Shaw wrote with a question about measuring smoothness and trueness, he mentioned that he’d searched my blog and didn’t find anything. “Wow,” I thought, “have I really written nothing about this?