Hot Racing Arrma Grom Rear Steel Helical Differential Ring & Pinion Gears Set (30/12T)

Helical Gear Overview:

The Steel Helical Differential Ring and Pinion Gear for Arrma Grom is a precision-machined upgrade featuring helical spiral-cut gears, which provide greater strength and smoother operation than stock bevel gears. Made from high-carbon steel, these gears are stronger, allowing for higher torque transmission with a lower tooth count.

About the Helical Gears

Helical Gears

High-carbon steel helical gear sets are premium upgrades for RC cars, designed to provide superior strength, smoother operation, and increased durability compared to standard bevel or straight-cut gears. The helical spiral-cut design enhances performance by allowing for better load distribution, reduced noise, and improved efficiency.

Features:

• Precision-machined helical spiral cut gears
• High-carbon steel construction
• Stronger than the stock gears
• More torque can be transmitted through a physical gear with fewer teeth ratio

Includes:

• (1) Steel Helical Cut Rear Ring Gear (30T)
• (1) Steel Helical Cut Rear Pinion Gear (12T)

*Note: It is recommended to use the same type of gears cut style for front and rear.

*Note: Do not use with stock pinion or ring gears with straight cut style teeth.

*Note: Apply a small amount of blue thread-lock on screws and greases on gears.

This product was added to our catalog on April 18, 2025

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