ARRMA 39T MOD1 Spool Gear 8mm Bore ARA310951

The ARRMA ARA310951 39T MOD1 Spool Gear is a steel 8mm bore drivetrain tuning gear designed for compatible ARRMA spool shaft setups needing adjustable gearing and smooth power transfer.

Features

• Gearing Tuning Option: Allows compatible ARRMA vehicles to be geared for different speed, acceleration, and driving conditions
• Strong Steel Construction: Durable steel material supports long service life in demanding RC use
• 39 Tooth Gear: 39T spool gear provides a lower gearing option compared with smaller tooth-count spool gears
• MOD1 Tooth Profile: Precision manufactured MOD1 teeth help provide smooth operation with compatible drivetrain components
• 8mm Bore Fitment: Designed to fit an 8mm diameter spool shaft
• Secure Mounting Hardware: Includes set screw and screw pin hardware for secure installation on the spool shaft

Specifications

• Brand: ARRMA
• Part Number: ARA310951
• Product Type: Spool gear
• Tooth Count: 39T
• Gear Pitch: MOD1
• Bore Size: 8mm
• Material: Steel
• Hardware: M4 set screw and M4 screw pin included
• Application: Compatible ARRMA spool shaft drivetrains using 8mm bore MOD1 spool gears
• Intended Use: Gearing adjustment, drivetrain tuning, replacement, and speed setup work

Includes

• 1 x ARRMA 39T MOD1 spool gear with 8mm bore
• 1 x M4 x 4mm set screw
• 1 x M4 screw pin

FAQ

What is the ARRMA ARA310951 spool gear used for? The ARRMA ARA310951 spool gear is used to fine tune gearing on compatible ARRMA spool shaft drivetrains using an 8mm bore MOD1 gear.

What bore size does this gear have? The ARRMA ARA310951 spool gear has an 8mm bore.

What tooth count is the ARRMA ARA310951 gear? The ARRMA ARA310951 spool gear has 39 teeth and a MOD1 tooth profile.

Does this gear include mounting hardware? Yes. The ARRMA ARA310951 gear includes one M4 x 4mm set screw and one M4 screw pin.

Will this fit every ARRMA vehicle? No. OZRC recommends checking your ARRMA vehicle manual or exploded diagram to confirm ARA310951 is the correct 8mm bore MOD1 spool gear before installation.

Important Notes

• Designed for compatible ARRMA spool shaft setups using an 8mm bore MOD1 spool gear.
• Check your vehicle manual, exploded diagram, motor shaft size, and gear mesh requirements before fitting.
• This listing is for the spool gear and included mounting hardware only. Spool shaft, motor, pinion gear, bearings, and other drivetrain components are not included.
• Changing gearing can affect motor temperature, ESC load, acceleration, and top speed. Monitor electronics temperatures after installation.