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900 Global Hard Drive

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

How it moves

Foul lineArrows · 15 ft50 ft · board 6.510.4° 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.
900 Global

Hard Drive

Discontinued
Hook potential6.5 (est.)6.5 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
S74 Pearl
Reactive pearl
Core
RAM
Asymmetric
Factory finish
4000 Grit NEAT T
Color
Midnight Blue/ Steel
Released
2013-07-03
USBC
Approved 2013-06-01

Weights and specs

WeightRGDifferentialInt. diff
15 lb2.480.0530.023

Surface

oil · laneCoarse grit
oil · laneCoarse and fine
oil · laneFine grit or polish
4000 Grit NEAT T. 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.