Photo and specs courtesy of Roto Grip. Reproduced with credit to the maker.
How it moves
Hockey-stick turn (asymmetric 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). The maker publishes no number for this ball, so this is estimated from the coverstock, core, finish, and differential.
Coverstock
R_VR1 Solid
Reactive solid
Core
R_Morph_Wing
Asymmetric
Factory finish
R_4000 Grit
Color
Indigo/Violet/Slate
Released
2026-01-23
Sold
Sold in the US
USBC
Approved 2025-12-02
Weights and specs
Weight
RG
Differential
Int. diff
16 lb
2.50
0.050
—
Surface
Coarse grit
Coarse and fine
Fine grit or polish
R_4000 Grit. 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
BowlerX.com · 2026 · Roto Grip Transformer Bowling Ball | BowlerX Full ReviewWest Seattle Bowl Proshop · 2026 · Roto Grip Transformer - Layout and Surface Comparison // Ball ReviewBeef and Barnzy · 2026 · Roto Grip Transformer Review by Chris Barnes
Picked by search for this ball; videos and thumbnails belong to their creators and play on YouTube.
Balls like this
Same coverstock and core type; the closest company for this ball in a bag.
