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
Urethane Pearl 78D
Urethane
Core
Super LED
Factory finish
500 Siaair Micro Pad
Color
Purple Pearl
Released
2026-03-19
USBC
Approved 2026-03-10
Weights and specs
Weight
RG
Differential
Int. diff
12 lb
2.62
0.040
—
13 lb
2.60
0.040
—
14 lb
2.63
0.034
—
15 lb
2.63
0.034
—
16 lb
2.58
0.034
—
Surface
Coarse grit
Coarse and fine
Fine grit or polish
500 Siaair Micro Pad. Bites through heavy oil, so the ball reads the lane early and hooks sooner. Sanded balls (500 to 1000 grit) live here. Surface changes over games, and a pro shop can take any ball either way with a pad.
Reviews on YouTube
Luke Rosdahl · 2026 · HAMMER PURPLE PEARL URETHANE 78D | It's BACK . . or is it?? DEEP DIVE REVIEWCreating the Difference · 2026 · RETURN OF A MONSTER | Hammer Purple Pearl Urethane 78D | Deep Dive Ball Review
Picked by search for this ball; videos and thumbnails belong to their creators and play on YouTube.
