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Roto Grip Idol Cosmos

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

How it moves

Foul lineArrows · 15 ft48 ft · board 9.55.5° 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

Idol Cosmos

Discontinued
Hook potential5.5 (est.)5.5 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
XtremeTrax Pearl
Reactive pearl
Core
Ikon
Symmetric
Factory finish
4k Fast
Color
Stardust Teal
Released
2022-07-08
USBC
Approved 2022-05-03

Weights and specs

WeightRGDifferentialInt. diff
12 lb2.650.035—
13 lb2.590.045—
14 lb2.540.049—
15 lb2.490.052—
16 lb2.490.049—

Surface

oil · laneCoarse grit
oil · laneCoarse and fine
oil · laneFine grit or polish
4k Fast. Coarse surfaces grip through oil and hook early; fine or polished surfaces skid longer and hook later. Surface changes over games, and a pro shop can take any ball either way with a pad.

Balls like this

Same coverstock and core type; the closest company for this ball in a bag.