These hub-mountable aluminum gears are ideal for transmitting motion from a motor or servo to a wheel or shaft. These gears have 48 teeth with a gear pitch of 32P, an outer diameter of 1.563", a bore of 0.50", and utilizes the 0.77" hub pattern. Gear Specifications - Tooth: 48T| P.D. 1.500"| O.D. 1.563"| .500"| Weight .30 oz.