Traxxas 12-Tooth HD Pinion Gear 32-P 3mm Bore Slash 4x4 Rustler Stampede - 3942X

Maximize your vehicle's low-end torque, improve acceleration, and keep your motor running cool with this factory-authentic Traxxas 3942X 12-Tooth Heavy Duty Pinion Gear. Engineered to handle high-stress setups, this gear is the perfect choice for RCs running larger tires, tackling thick mud, or conquering steep rock crawls where raw pulling power is needed most.

Constructed from ultra-durable, high-grade steel, this pinion gear features a 32-pitch (0.8 metric module) tooth profile. The thick, robust tooth design provides massive surface area contact, making it virtually strip-proof when paired with a matching 32-pitch spur gear under heavy brushless power loads.

Key Features & Specifications

• Heavy-Duty Steel Construction: Machined from high-tensile steel to resist wear and chipping under extreme brushless or brushed motor torque.

• Torque-Optimized Gearing: A lower 12-tooth count reduces overall top-end speed while massively increasing wheel torque and reducing motor amp draw.

• Precision Fit: Features a standard 3mm internal bore diameter with a clean, pre-machined flat surface for a secure set screw hold.

• Factory Spec Details:

  • Part Number: TRX3942X / 3942X

  • Tooth Count: 12T

  • Gear Pitch: 32-Pitch (Compatible with 0.8 Mod spur gears)

  • Shaft Bore Diameter: 3 mm

  • Included Hardware: (1) Pinion Gear, (1) Set Screw / Grub Screw

Broad Vehicle Compatibility

This 32-pitch pinion gear is widely used across Traxxas 4x4 and high-power 2WD lines utilizing standard 3mm motor shafts (such as Titan 12T brushed motors or Velineon 3500 brushless motors). Direct fitment includes:

• Traxxas Slash 4X4 (Ultimate, Platinum, VXL, and BL-2s versions)

• Traxxas Rustler 4X4 (VXL and BL-2s versions)

• Traxxas Stampede 4X4 (VXL and BL-2s versions)

• Traxxas E-Revo & Summit (1/10 scale models running multi-motor or 3mm shaft setups)

• Traxxas Hoss 4X4 VXL (When converting/tuning motor shafts)