Photo and specs courtesy of bowwwl.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
Solid Urethane 78D
Urethane
Core
Thunder Bolt
Symmetric
Factory finish
500/1000 Siaair Micro Pad
Color
Not listed
Released
2025-07-24
Sold
Overseas only
USBC
Approved
Weights and specs
Weight
RG
Differential
Int. diff
14 lb
2.50
0.046
—
15 lb
2.48
0.046
—
16 lb
2.48
0.046
—
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
Crusader Strikes · 2022 · 1988 Thunderbolt Urethane by Ebonite is up next #bowlingwithrelics
Picked by search for this ball; videos and thumbnails belong to their creators and play on YouTube.
Balls like this
Same coverstock and core type; the closest company for this ball in a bag.
