Photo and specs courtesy of Hammer. Reproduced with credit to the maker.
How it moves
Hockey-stick turn (asymmetric 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
HK22C² Pearl
Reactive pearl
Core
Super Offset
Asymmetric
Factory finish
500, 1000, 1500 Siaair / Factory Compound
Color
Silver / Orange / Black
Released
2025-11-20
Sold
Sold in the US
USBC
Approved 2025-10-14
Weights and specs
Weight
RG
Differential
Int. diff
12 lb
2.59
0.041
0.014
13 lb
2.60
0.041
0.014
14 lb
2.54
0.053
0.020
15 lb
2.52
0.053
0.020
16 lb
2.54
0.045
0.017
Surface
Coarse grit
Coarse and fine
Fine grit or polish
500, 1000, 1500 Siaair / Factory Compound. 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.
Reviews on YouTube
BrunsNick · 2025 · ABSURD BACKEND HOOK! | Hammer Zero Mercy PearlHammer Bowling · 2025 · Hammer Zero Mercy Pearl | Robert Smith900 Proshop · 2025 · Hammer Zero Mercy Pearl & Zero Mercy Solid | 900 Pro Shop Review
Picked by search for this ball; videos and thumbnails belong to their creators and play on YouTube.
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