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 Solid
Reactive solid
Core
Super Offset
Asymmetric
Factory finish
500, 1500 Siaair Micro Pad
Color
Black / Purple / White / Red
Released
2025-11-20
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
Reviews on YouTube
BrunsNick · 2025 · TOTAL INSANITY! | Hammer Zero Mercy SolidHammer Bowling · 2025 · Hammer Zero Mercy Solid | Bill O'NeillBowlerX.com · 2026 · Hammer Zero Mercy Solid and Pearl Mixed Review | BowlerX Review with JR Raymond
Picked by search for this ball; videos belong to their creators and open on YouTube.
