Callaway Big Bertha Diablo Driver

March 6, 2009

Big Bertha drivers have been a gold standard,
since 1991, for easy-to-hit, ultra-forgiving sticks
that mid- and high-handicappers swear by. Big
Bertha Diablo looks to spread the love to include
highly skilled players, too. The three-piece, all titanium
clubhead fuses a light, strong body
to a lively clubface and a thin crown (Callaway’s
thinnest ever at 0.027″). The light frame enables
discretionary weight

(a 10-gram internal weight
chip in the Neutral head; a 15-gram chip in the
Draw version) to be welded into the rear. This contributes
to a higher moment of inertia (MOI) and a
precise center of gravity (CG) placement. “We also
use head shape more aggressively than in previous
designs to steer the center of gravity to neutral
or draw locations,” says Dr. Alan Hocknell,
VP of Innovation and Advanced Design. In total,
the MOI in the Diablo Neutral is 20 percent higher
(the Draw version is 10 percent higher) than the
Big Bertha 460 driver. Its hyperbolic face—thicker
in the center, thinner around the periphery—
works with the more stable head to deliver
faster ball speeds on off-center hits (translation:
less distance loss) than Callaway’s previous
titanium drivers.

$299, graphite