ARRMA Pinion Gear 35T Mod1 Safe-D8 Steel ARA311123

The ARRMA ARA311123 Pinion Gear is a 35T Mod1 Safe-D8 steel motor gear designed for compatible high-power ARRMA vehicles needing secure motor shaft fitment and reliable power transfer.

Features

• 35 Tooth Pinion Gear: Provides a high-speed gearing option for compatible ARRMA drivetrain setups
• Mod1 Gear Pitch: Designed to mesh with compatible Mod1 spur or spool gears
• Safe-D8 Bore Design: D-shaped bore matches compatible motor shaft profiles to help retain drive and braking if the set screw loosens
• Steel Construction: Strong and durable steel material supports long-lasting performance in extreme RC conditions
• Precision Wide Tooth Profile: Manufactured for smooth power delivery and reliable gear mesh
• 8mm Motor Shaft Fitment: Designed for compatible 8mm diameter motor shafts
• Retaining Hardware Included: Supplied with M4 set screw and 6mm E-clip for secure installation

Specifications

• Brand: ARRMA
• Part Number: ARA311123
• Product Type: Pinion gear
• Tooth Count: 35T
• Gear Pitch: Mod1
• Type: Safe-D8 pinion gear
• Bore Type: D-shaped bore
• Motor Shaft Diameter: 8mm
• Material: Steel
• Application: Compatible ARRMA high-power brushless vehicles using 8mm motor shafts and Mod1 gearing
• Intended Use: Gearing adjustment, speed tuning, drivetrain replacement, and high-load RC applications

Includes

• 1 x ARRMA 35T Mod1 Safe-D8 pinion gear
• 1 x M4 x 4mm set screw
• 1 x 6mm E-clip

FAQ

What motor shaft size does the ARRMA ARA311123 pinion fit? The ARRMA ARA311123 pinion gear is designed for compatible 8mm diameter motor shafts.

What does Safe-D8 mean on this pinion gear? Safe-D8 refers to the D-shaped bore that matches compatible motor shaft profiles, helping retain drive and braking if the set screw backs out.

What gear pitch is the ARRMA ARA311123 pinion? The ARRMA ARA311123 pinion gear uses a Mod1 gear pitch.

Is mounting hardware included? Yes. The ARRMA ARA311123 pinion gear includes an M4 x 4mm set screw and a 6mm E-clip.

Will this fit every ARRMA vehicle? No. OZRC recommends checking your ARRMA vehicle manual, motor shaft size, spur or spool gear pitch, and gearing requirements before fitting ARA311123.

Important Notes

• Designed for compatible 8mm motor shafts and Mod1 drivetrain gears only.
• Compatible with selected ARRMA high-power platforms such as 1/5 Kraton 4WD Extreme Bash Roller ARA5208 and ARA5208B, 1/5 Outcast Extreme Bash Roller ARA5210 and ARA5210B, and 1/7 Limitless V2 Speed Bash Roller ARA7116V2 where ARA311123 is specified.
• Check motor temperature, ESC temperature, gear mesh, and drivetrain load after changing gearing.
• This listing is for the pinion gear and included mounting hardware only. Motor, spur gear, spool gear, vehicle, tools, and other drivetrain parts are not included.