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Roto Grip Haywire

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

How it moves

Foul lineArrows · 15 ft40 ft · board 6.54.5° 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.
Roto Grip

Haywire

Discontinued
Hook potential7.5 (est.)7.5 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
80H MicroBite Solid
Reactive solid
Core
Middle Roll 70
Factory finish
2000 Grit Pad
Color
Navy/Peach/Sky Blue
Released
2015-08-01
USBC
Approved 2015-06-01

Weights and specs

WeightRGDifferentialInt. diff
15 lb2.500.043—

Surface

oil · laneCoarse grit
oil · laneCoarse and fine
oil · laneFine grit or polish
2000 Grit 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.