ARRMA Kraton Outcast 8S 12T Spiral Main Input Gear AR310912

The ARRMA Kraton Outcast 8S 12T spiral main input gear is a genuine replacement drivetrain gear for compatible ARRMA 1/5 8S vehicles, helping restore smooth power transfer and reliable gearbox operation after wear or damage.

This high-quality 12 tooth spiral cut main input gear is manufactured from tough steel for long-lasting durability in demanding RC conditions. The precision manufactured spiral gear teeth are designed for smooth operation inside compatible ARRMA 8S gearbox assemblies where AR310912 or ARA310912 is listed in the vehicle manual.

Features

• Genuine ARRMA Replacement Part: Factory main input gear for compatible ARRMA 8S vehicles
• 12 Tooth Gear: Matches the specified 12T main input gear used in supported ARRMA drivetrain assemblies
• Spiral Cut Gear Teeth: Precision manufactured tooth profile helps provide smooth gearbox operation
• Tough Steel Construction: Built for long-lasting durability and consistent performance in high-power RC use
• Kraton And Outcast 8S Fitment: Commonly listed for ARRMA Kraton 8S and Outcast 8S vehicles where this part number appears in the manual
• Useful Drivetrain Spare: Ideal for replacing worn, chipped, noisy or damaged main input gears during gearbox servicing

Specifications

• Brand: ARRMA
• Part Number: AR310912
• Horizon Hobby Orderable Number: ARA310912
• Reference Number: 310912
• Product Type: Main input gear
• Scale: 1/5
• Vehicle Compatibility: ARRMA vehicles where AR310912 or ARA310912 is listed in the manual
• Common Listed Applications: ARRMA Kraton 8S and Outcast 8S platforms where confirmed by the vehicle manual
• Material: Steel
• Tooth Count: 12T
• Gear Type: Spiral cut main input gear
• Position: Gearbox input assembly
• Quantity: 1 gear
• Intended Use: Replacement gearbox input gear for compatible ARRMA large-scale RC vehicles

Includes

• 1 x ARRMA 12T spiral cut main input gear

FAQ

Does this main input gear fit the ARRMA Kraton 8S? Yes. ARRMA ARA310912 is listed for compatible Kraton 8S vehicles where this part number appears in the manual.

Does this main input gear fit the ARRMA Outcast 8S? Yes. ARRMA fitment data lists compatible Outcast 8S models where ARA310912 is used as a standard part.

How many gears are included? This listing includes one 12T spiral cut main input gear.

When should the main input gear be replaced? Replace it if the gear teeth are chipped, worn, noisy, binding, damaged from incorrect mesh or causing rough drivetrain operation.

Are bearings or shafts included? No. This listing includes the 12T main input gear only. Bearings, shafts, screws and gearbox case parts are not included unless listed separately.

Important Notes

• Check your ARRMA vehicle manual to confirm AR310912 or ARA310912 is the correct replacement part before ordering.
• This listing includes the main input gear only.
• Gearbox shafts, bearings, screws, diff parts, gearbox case components, grease and tools are not included unless listed separately.
• Inspect related gears, bearings and shafts during installation, as worn mating parts can quickly damage a new gear.
• After installation, check drivetrain movement by hand before driving and re-inspect after the first run.