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Roto Grip Jester Clear Polyester

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

How it moves

Foul lineArrows · 15 ft1° entry
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.
Roto Grip

Jester Clear Polyester

Hook potential1 (est.)1 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
Clear Polyester
Polyester
Core
3-piece Pancake
Factory finish
3500-grit Polished
Color
Black/Red
Released
2024-10-01
USBC
Approved 2024-05-21

Weights and specs

WeightRGDifferentialInt. diff
15 lb2.69——

Surface

oil · laneCoarse grit
oil · laneCoarse and fine
oil · laneFine grit or polish
3500-grit Polished. 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.