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Brunswick U-Motion

Photo and specs courtesy of Brunswick. Reproduced with credit to the maker.

How it moves

Foul lineArrows · 15 ft34 ft · board 12.51.5° entry
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.
Brunswick

U-Motion

Discontinued
Hook potential3.5 (est.)3.5 of 10, estimated

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
Urethane
Core
U-Motion
Factory finish
500, 1000 Siaair Micro Pad
Color
Deep Dark Purple
Released
Not listed
USBC
Approved 2020-02-04

Weights and specs

Weight specs have not been entered yet.

Surface

oil · laneCoarse grit
oil · laneCoarse and fine
oil · laneFine 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.