Photo and specs courtesy of Motiv. 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). Normalized from the maker's own scale.
Coverstock
Propulsion™ MXV Pearl Reactive
Reactive pearl
Core
Detonator™ Symmetrical
Factory finish
5000 Grit LSS
Color
Not listed
Released
2025-08-13
USBC
Approved 2025-07-22
Weights and specs
Weight
RG
Differential
Int. diff
12 lb
2.62
0.032
—
13 lb
2.55
0.045
—
14 lb
2.49
0.054
—
15 lb
2.47
0.055
—
16 lb
2.47
0.054
—
Surface
Coarse grit
Coarse and fine
Fine grit or polish
5000 Grit LSS. 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
Dzintars Grinfelds · 2026 · Comparing the new MOTIV Sigma Tour Pearl to the Steel Forge | Bowling Ball ReviewBowlerX.com · 2025 · MOTIV Steel Forge Bowling Ball | BowlerX Full ReviewVirtue Bowling Supply · 2025 · Motiv Steel Forge | High & Low Rev Comparisons Review
Picked by search for this ball; videos and thumbnails belong to their creators and play on YouTube.
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