Small Gear Wheels

Motor Pulley, 9V Micromotor with axle hole

Light Gray· 2983

Technic Gear 14 Tooth Bevel

Light Gray· 4143

Technic Gear 16 Tooth with Round Holes [Old Style]

Light Gray· 4019

Technic Gear 24 Tooth [New Style with Single Axle Hole]

Light Gray· 3648b

Technic Gear 24 Tooth Crown with Reinforcements [New Style]

Light Gray· 3650c

Technic Gear 8 Tooth

Light Gray· 3647

Technic Gear Rack 1 x 4

Light Gray· 3743

Technic Worm Gear

Black· 4716

Technic Wedge Belt Wheel [aka Pulley]

Light Gray· 4185