Photo and specs courtesy of bowling.com. 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
eTrax Plus Pearl
Reactive pearl
Core
Roto Star Tour (RST)
Asymmetric
Factory finish
1500 Polished
Color
Tanzanite
Released
2021-08-20
USBC
Approved 2021-06-08
Weights and specs
Weight
RG
Differential
Int. diff
12 lb
2.59
0.029
0.008
13 lb
2.57
0.032
0.010
14 lb
2.55
0.053
0.016
15 lb
2.53
0.053
0.016
16 lb
2.52
0.049
0.015
Surface
Coarse grit
Coarse and fine
Fine grit or polish
1500 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.
Reviews on YouTube
EMAX Bowling Service · 2021 · Roto Grip RST X-2 Bowling Ball Review – Emax Bowling Ball Reviews with PBA Star Thomas LarsenCreating the Difference · 2021 · Roto Grip RST X-2 Bowling Ball Review - TruBall ReviewsTen Pin Life · 2021 · Roto Grip RST X-2 | Bowling Ball Review | Ten Pin Life
Picked by search for this ball; videos and thumbnails belong to their creators and play on YouTube.
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Same coverstock and core type; the closest company for this ball in a bag.
