Photo and specs courtesy of bowling.com. 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
HK22 - Cohesion Hybrid Reactive CFI
Reactive hybrid
Core
Huntsman
Factory finish
500, 1500 Siaair Micro Pad
Color
Black/Lime/Silver/Purple
Released
2025-09-01
USBC
Approved 2025-09-09
Weights and specs
Weight
RG
Differential
Int. diff
15 lb
2.47
0.050
—
Surface
Coarse grit
Coarse and fine
Fine grit or polish
500, 1500 Siaair Micro Pad. Sanded then smoothed (1500 to 3000 grit): enough tooth for oil, enough gloss to get down the lane. Most box finishes. Surface changes over games, and a pro shop can take any ball either way with a pad.
Reviews on YouTube
BrunsNick · 2025 · THE BOSS! | Hammer Maximum EffectRev It Up Bowling · 2025 · Hammer Maximum Effect Review – Big Core, Big Motion, Big Control“Back After 10” Ball Reviews · 2025 · Hammer Maximum Effect Full Review
Picked by search for this ball; videos and thumbnails belong to their creators and play on YouTube.
