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Track 505T

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

How it moves

Foul lineArrows · 15 ft38 ft · board 5.54.4° entry
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.
Track

505T

Discontinued
Hook potential8 (est.)8 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
All New MP Gen 4 Reactive™
Reactive solid
Core
Shuttle
Symmetric
Factory finish
500, 1000, 2000, 4000 Abralon®
Color
Steel Blue / Black / Gold
Released
Not listed
USBC
Approved 2010-05-01

Weights and specs

WeightRGDifferentialInt. diff
14 lb2.460.046—
15 lb2.480.040—
16 lb2.490.040—

Surface

oil · laneCoarse grit
oil · laneCoarse and fine
oil · laneFine grit or polish
500, 1000, 2000, 4000 Abralon®. 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.