Photo and specs courtesy of Hammer. Reproduced with credit to the maker.
How it moves
Straight (spare ball). 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
Polyester
Polyester
Core
Gas Mask
Asymmetric
Factory finish
500, 1000, 2000 Siaair / Factory Polish
Color
White Diamond
Released
2026-09-17
Sold
Sold in the US
USBC
Approved 2026-09-08
Weights and specs
Weight
RG
Differential
Int. diff
10 lb
2.80
0.002
—
11 lb
2.77
0.002
—
12 lb
2.61
0.043
0.011
13 lb
2.59
0.043
0.011
14 lb
2.51
0.058
0.013
15 lb
2.48
0.058
0.013
16 lb
2.50
0.049
0.012
Surface
Coarse grit
Coarse and fine
Fine grit or polish
500, 1000, 2000 Siaair / Factory Polish. 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 · 2026 · IT'S PLASTIC, BUT...🕷️ | Hammer Black Widow Spare+Hammer Bowling · 2026 · Hammer Black Widow Spare+ | Release VideoBad Bad Bowling 101 · 2026 · Hammer Black Widow Spare + review on PBA Chameleon
Picked by search for this ball; videos and thumbnails belong to their creators and play on YouTube.
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