HRSMMX9390F Steel Helical Differential Ring & Pinion Gear for Traxxas® Mini Maxx® (Front) (39T/10T)

Steel helical differential ring and pinion gear set sized 39T/10T engineered for the front differential of Traxxas® Mini Maxx® vehicles. Precision machined gears use a helical tooth profile to provide smoother, quieter operation and increased surface contact for improved torque distribution compared with straight-cut gears. Hardened steel construction resists wear and deformation under load, enhancing drivetrain durability during aggressive driving and high-power use. Designed to fit directly into the Mini Maxx front differential housing using standard bearings and hardware without modification. Improves traction and differential action for better handling on varied terrain.

• Hardened steel helical ring and pinion gear set for long wear and strength.
• 39T ring gear paired with 10T pinion for correct Mini Maxx front diff ratio.
• Helical tooth profile for smoother, quieter engagement and extended gear life.
• Direct replacement for stock differential gears using factory components.
• Enhances front drivetrain durability under high torque conditions.
• Helps improve traction and power distribution during acceleration and cornering.
• Precision machining maintains accurate gear mesh and reduced backlash.