Photo and specs courtesy of Track. Reproduced with credit to the maker.
How it moves
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.
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
QR-7 Hybrid (HK22)
Reactive hybrid
Core
Shuttle
Symmetric
Factory finish
500, 1500, 4000 Siaair
Color
Cobalt / Black
Released
2023-04-20
USBC
Approved 2023-03-21
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
0.040
0.006
15 lb
2.48
0.040
0.006
16 lb
2.49
0.038
0.006
Surface
Coarse grit
Coarse and fine
Fine grit or polish
500, 1500, 4000 Siaair. 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.
