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Track Theorem Delta

Photo and specs courtesy of Track. Reproduced with credit to the maker.

How it moves

Foul lineArrows · 15 ft46 ft · board 57° entry
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.
Track

Theorem Delta

Hook potential7.5 est.7.5 of 10, estimated

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
Super Response Hybrid (HK22)
Reactive hybrid
Core
MC2 Asym
Asymmetric
Factory finish
500, 1000, 1500 Siaair / Factory Compound
Color
Black / Indigo / Blue
Released
2026-08-13
USBC
Approved 2026-06-30

Weights and specs

WeightRGDifferentialInt. diff
12 lb2.590.0410.014
13 lb2.600.0410.014
14 lb2.490.0460.017
15 lb2.470.0460.017
16 lb2.480.0440.017