Single and double action trucks are interchangeable on Laser plates. In other words, if you have single action, you may purchase 4 double action trucks (with cushions) and change your plates to double action. (And vice versa.)
C100C Single Action Truck/axle Complete with Cushions
C102C Double Action Truck/axle Complete with Cushions
C100 Single Action Nylon Truck Housing
C102 Double Action Truck Housing
AXMG-CN53P Magnum Axle with Stub Cones Installed
AXMG Magnum Axle
CN53P - Precision Stub Cone
C130 Action Bolt - self aligning 2 1/2in X 3/8in slot head
C135 Nylon Action Washer for Action Bolt
CH579 Single Action Laser Cushion
C139 Double Action Laser Cushion
C140 Action Bolt Cushion - 3/16 X .900 Black Urethane
C144 Washer - Retainer for .900 Cushions
C149 Action Nut, Heavy Jam - 3/8 - 16 X .250
C151 Action-Lock Clip/Washer aka Saddle Washer
D200 - Toe Stop Adjustment Screw, Button Head
D201 - Toe Stop Adjustment Screw Washer
D205 - Toe Stop Insert for plates after 1987
D206 - Toe Stop Insert for plates 1985-1987
E230 Short Mounting Bolt - Hardened Steel 1 7/8 in
E231 Long Mounting Bolt - Hardened Steel 2 1/2 in
E235 Flange Lock Nut
F300 Small Heel Support Discs - 2 in Dia, Nylon
F310 Medium Front Support Discs for 9.0, 9.1, 9.2 plates - 2 1/2 in Dia, Nylon
F315 - Large Front Support Discs for 9.3 & Larger plates - 2 in Dia, Nylon
NT932N 9/32 Nylon Lock Nut