This is the optional Factory Team 22T 48P Aluminum Pinion Gear.
Hard anodized light weight 7076-T6 aluminum construction
Fits many Team Associated vehicles, and may also be used in other
vehicles requiring 48 pitch gears
Fits motors with 1/8" diameter shaft
Laser etched tooth count
Two set screw holes
Factory Team 22T 48P Aluminum Pinion Gear with Set Screw
Number of Teeth: 22
Gear Pitch: 48
Hole Diameter: 1/8"