Traxxas 31-T 0.8 Metric Pitch 5mm Shaft RC Pinion Gear - 5638

The Traxxas 5638 is a 31-tooth pinion gear designed for Traxxas RC models using a 5mm motor shaft. Manufactured to 0.8 metric pitch — directly compatible with 32-pitch spur gears — this pinion gear (part number TRX5638) is a genuine Traxxas replacement part that keeps your drivetrain running with the correct mesh and tolerances. It includes a set screw for secure shaft retention. If you're rebuilding a worn drivetrain or swapping gear ratios on a compatible Traxxas model, this is the correct spec part to use.

Key Features

• 31-tooth count suits a range of drivetrain ratio configurations on compatible Traxxas models
• 0.8 metric pitch is cross-compatible with standard 32-pitch spur gears
• Fits 5mm motor shafts, matching the output shaft diameter used across many Traxxas electric platforms
• Includes a set screw for a firm, rattle-free fit on the motor shaft
• Genuine Traxxas part ensuring correct tolerances and mesh with OEM spur gears

Compatible With

• Traxxas 85086-4

What's Included

• 1 x Traxxas 5638 31-tooth pinion gear (0.8 metric pitch / 32-pitch compatible, 5mm shaft bore)
• 1 x Set screw