9.5 X 28MM Bearings:
Fits RockStar, Rockstar II, RockStar Pro Hubs, Twistar and TriSpoke hubs
Fits 9.5mm All Terrain Skate (ATS) Trucks & Vector Trucks.
9.5 x 22mm bearings:
Bearings for ATS TRUCK w/ JEEP/ATOM 95/80 WHEEL
Fits RockStar hubs, TriSpoke hubs, and Twistar hubs.
Only fits Matrix, Matrix Lite and Matrix Pro trucks (12mm axle).
8 x 22 mm:
Fits Skate wheels.
Fits Standard Skate trucks.