Traxxas has released 48 PITCH PINION GEAR / 18T under category
This may be thw 18T 48P Pinion Gear and Set Screw from Traxxas. Features: steel construction Fits 2.3mm Shafts Includes: One 18T 48P Pinion Gear One 3x4mm Set Screw Specs: Outer Diameter: 10.3mm (0.41") interior Diameter: 2.39mm (0.09") Length: 8.5mm (0.33")