A prototype of the new Callaway prototype driver was spotted at last weeks tour stop. It appears this driver will feature a rear slide weight positioned towards the back vs TM’s version which features the slide bar on the bottom. Companies like Titleist, Callaway and Ping have preferred more rearward weighting strategies, which according to Ping’s Marty Jertson, a senior design engineer for the company, improves clubhead stability and allows golfers to achieve more efficient launch conditions (a.k.a. a lower spin loft).
The driver also includes a removable weight at the end of the weight track on the heel portion of the driver and a dual-cog adjustable hosel, but don’t count on this driver coming to retail exactly as is — Callaway officials declined comment on the unfinished prototype, which doesn’t have scoring lines on the face or markings on the sole.