Sigma 2

The Sigma 2 shipped in 2018 as Ping's second generation of length-adjustable putters, spread across nine head shapes: Anser, ZB2, Arna, Kushin C, Fetch, Tyne, Tyne 4, Wolverine H, and Valor, according to the maker's page. PGATour.com's reporting on the line put the total at 10 different head models and credited the adjustable shaft to Dr. Paul Wood, Ping's VP of Engineering, noting that the first adjustable-length effort took around 2 years to develop while this second-generation feature took more like 3.

The core idea carried over from the earlier system is length adjustment, and the maker's page lists a quarter inch per full turn as the increment, with a length range of 32 to 36 inches. PGATour.com's editorial coverage frames the benefit in performance terms, citing 10 to 20% distance control improvements from letting a golfer set the putter to a comfortable length, and adds that Ping believed itself the first company with this kind of system. That same reporting also describes the face as carrying two-layered inserts with a patented variable depth groove, while the maker's page describes the face insert as dual-durometer PEBAX with a True Roll pattern that varies in depth and pitch across the face. Both sources point at the same face technology from different angles, one from the catalog sheet, one from the newsroom, and the reader can weigh which detail matters more to them.

On the grip side, the maker's page lists PP60, PP61, and PP62 pistol grips as options, and its own prose runs through the family in more granular terms, describing a heavy putter grip built for "an assured feel and promote a smooth tempo throughout your stroke," a midsize lightweight design "with a foam under-listing and dominant flats for face awareness," and a third option built with "a rubber under-listing for a softer response." PGATour.com's reporting adds that the shafts were built in Phoenix and that the line was sorted into face balanced, mid-hang, and toe down categories for fitting, with testing said to show heel, center, and toe hits rolling very close to the same distance. Against the rest of Ping's putter catalog, the Sigma 2 reads as the company's attempt to standardize adjustable length across a full spread of head shapes rather than a single flagship model.