Photo and specs courtesy of Brunswick. 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
ECA-X Pearl
Reactive pearl
Core
Kingpin Ultra Low RG
Asymmetric
Factory finish
500 Siaair, Crown Factory Compound
Color
Gold Pearl
Released
2018-09-19
USBC
Approved 2018-06-19
Weights and specs
Weight
RG
Differential
Int. diff
12 lb
2.61
0.043
0.011
13 lb
2.59
0.043
0.011
14 lb
2.50
0.055
0.020
15 lb
2.48
0.055
0.020
16 lb
2.47
0.055
0.020
Surface
Coarse grit
Coarse and fine
Fine grit or polish
500 Siaair, Crown Factory Compound. 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.
Balls like this
Same coverstock and core type; the closest company for this ball in a bag.
