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
Gen ET (Extreme Traction)
Core
The Legion 2 Turbo core is back. This core creates easy revs while storing plent
Asymmetric
Factory finish
In order to create the strong overall hook that was desired when creating the 91
Color
Blue / Red / Orange
Released
Not listed
USBC
Approved 2012-05-01
Weights and specs
Weight
RG
Differential
Int. diff
12 lb
2.60
0.039
—
13 lb
2.53
0.055
—
14 lb
2.51
0.048
0.012
15 lb
2.50
0.046
0.011
16 lb
2.51
0.040
0.010
Surface
Coarse grit
Coarse and fine
Fine grit or polish
In order to create the strong overall hook that was desired when creating the 91. 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.