Parts/Drivetrain/Pinion gears/Arrma Mod 0.5 Pinion Gear (2.3mm Bore) (21T)
Arrma Mod 0.5 Pinion Gear (2.3mm Bore) (21T)
Arrma

Arrma Mod 0.5 Pinion Gear (2.3mm Bore) (21T)

Part # ARA3112075.0(1)
Where to buy
$5.99
AMain Hobbies
Seen Oct 12, 2026
$5.99Buy
Prices are as last seen at the store; stock is not tracked.

About this part

Pinion Gear Overview:

This is the Mod 0.5 Pinion Gear from Arrma. Crafted from tough steel, this gear provides a robust and reliable option for your RC vehicle's kit pinion gear, ensuring smooth power transmission and durability. Available in multiple tooth counts this is the easiest way to tune your gear ratio.


Features:

  • Tough steel construction
  • 2.3mm bore
  • Smooth power transmission

Includes:

  • (1) Mod 0.5 Pinion Gear
  • (1) 3x4mm Set Screw
CA Residents Prop 65 Warning WARNING: This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov Details...

Reviews5.0 · 1 reviewacross all options

KenVerified owneron Arrma Mod 0.5 Pinion Gear (2.3mm Bore) (22T)

Perfect to you that slight edge on the Losi NASCAR. Perfect gear ratio with the factory spur gear and brushed motor. You get better top end and will have good off the line. You will need the Losi adjustable motor mount LOS-1949.

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