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
Gauntlet
Asymmetric
Factory finish
500, 1000 Siaair Micro Pad
Color
Black
Released
2026-05-14
Sold
Sold in the US
USBC
Approved 2026-05-05
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
2.52
0.050
0.012
15 lb
2.50
0.050
0.012
16 lb
2.51
0.044
0.011
Surface
Coarse grit
Coarse and fine
Fine grit or polish
500, 1000 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
BrunsNick · 2026 · IT'S BORN AGAIN! 😈🗡️ | Hammer SpawnGGJ Bowling · 2026 · [Review] Hammer Spawn. The ball that came out of nowhere.West Seattle Bowl Proshop · 2026 · Hammer Spawn versus Widow 3.0 Dynasty // Ball Review
Picked by search for this ball; videos and thumbnails belong to their creators and play on YouTube.
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