

HRASMMX9390F
Steel Helical Differential Ring & Pinion Gear for Traxxas Mini Maxx (Front) (39T/10T)
Steel Helical Differential Ring & Pinion Gear for Traxxas Mini Maxx (Front) (39T/10T)
Helical Gear Overview:
The Steel Helical Differential Ring and Pinion Gear for Traxxas® Mini Maxx® 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 Front 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 bevel gears
- More torque can be transmitted through a physical gear with fewer teeth ratio
Includes:
- (1) 39 Tooth Steel Helical Cut Front Ring Gear
- (1) 10 Tooth Steel Helical Cut Front Pinion Gear
Pairs well with
Easy to use for beginners
Durable build for long-lasting fun
Quick recharge and extended range for all-day play
Perfect for pools, lakes, and calm rivers

Steel Helical Differential Ring & Pinion Gear for Traxxas Mini Maxx (Front) (39T/10T)
Product details
Collapsible row
Use collapsible tabs for more detailed information that will help customers make a purchasing decision.
Ex: Shipping and return policies, size guides, and other common questions.
Collapsible row
Use collapsible tabs for more detailed information that will help customers make a purchasing decision.
Ex: Shipping and return policies, size guides, and other common questions.

Engineered for Speed. Built for Control.
Our RC vehicles and parts are crafted with cutting-edge tech and tested for durability. From high-speed drones to rugged RC cars and boats, every product delivers serious fun and unmatched reliability.
Performance You Can Trust
Join thousands of RC enthusiasts who count on ParkFlyers for top-tier quality, responsive customer support, and an unbeatable collection of parts and models.
Got Questions? We've Got Answers
What types of RC vehicles do you sell?
We offer a wide range of RC vehicles including airplanes, drones, helicopters, cars, trucks, boats, and a full selection of parts and upgrades for each.
Are your products ready to run (RTR) or require assembly?
Most of our models are RTR (Ready to Run) or RTF (Ready to Fly), meaning they include everything you need out of the box. Some kits may require minimal assembly—check the product description for details.
Do you offer replacement parts?
Yes! We stock replacement parts for most models we sell. If you’re not sure which part you need, contact our support team and we’ll help you find the right match.
How long does shipping take?
Orders typically ship within 1–2 business days. Delivery time depends on your location, but most customers in the U.S. receive their orders within 3–7 business days.
Do you ship internationally?
At the moment, we primarily ship within the U.S., but international shipping is available on select items. Please contact us for a custom quote.
























