Photo and specs courtesy of Hammer. Reproduced with credit to the maker.
How it moves
Arcing turn (symmetric core). Dotted is skid, then the turn, then the roll into the pocket. Estimated from the coverstock, finish, core, and differential for a right-handed bowler with medium revs on a house shot. Lane conditions, speed, and layout move all of this.
How much the ball wants to hook, 1 (straight, a spare ball) to 10 (the strongest oil-eaters). The maker publishes no number for this ball, so this is estimated from the coverstock, core, finish, and differential.
Coverstock
Juiced Pearl
Reactive pearl
Core
Raw Hammer
Symmetric
Factory finish
500, 1000, 2000 Siaair / Factory Polish
Color
Red / White / Purple
Released
2026-05-14
USBC
Approved 2026-05-05
Weights and specs
Weight
RG
Differential
Int. diff
10 lb
2.80
0.002
—
11 lb
2.77
0.002
—
12 lb
2.61
0.040
—
13 lb
2.58
0.040
—
14 lb
2.55
0.038
—
15 lb
2.54
0.038
—
16 lb
2.54
0.033
—
Surface
Coarse grit
Coarse and fine
Fine grit or polish
500, 1000, 2000 Siaair / Factory Polish. Skims the oil and saves its energy for the dry part of the lane: longer skid, later and sharper hook. Polished and pearl balls. Surface changes over games, and a pro shop can take any ball either way with a pad.
Balls like this
Same coverstock and core type; the closest company for this ball in a bag.
