INJORA 12T/22T overdrive front gears for TRX4M improve steering precision.
INJORA 24T/10T underdrive rear gears enhance crawling stability on rugged terrain.
INJORA 20CrMo alloy steel gears detail shows durable construction.
INJORA TRX4M axle-fit image demonstrates front and rear compatibility.
INJORA gear-set packaging highlights easy-to-use upgrade kit.
INJORA front-overdrive detail suggests enhanced steering feel on challenging courses.
INJORA complete kit image shows front overdrive and rear underdrive gears together.

INJORA

INJORA Overdrive 12T/22T & Underdrive 24T/10T Alloy Helical Gear Set for TRX4M 1/18 RC Crawler – Upgrade Kit

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$34.50

Available quantity: 5.

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Product details

Overview

Upgrade your TRX4M 1/18 RC crawler with INJORA's alloy steel overdrive and underdrive gear set. Crafted from CNC-machined 20CrMo alloy steel, these gears deliver robust strength and precise engagement while staying quieter and smoother than stock plastic gears.

Designed for front and rear axles, this kit lets you tailor torque distribution for demanding terrains, helping you maintain control while navigating tight turns and steep inclines.

What is included

  • 12T/22T overdrive gears for the front axle
  • 24T/10T underdrive gears for the rear axle
  • Hardware and mounting hardware for TRX4M compatibility

Key benefits

  • 9% front overdrive and 16.7% rear underdrive to adjust drivetrain balance
  • Lower vibration, reduced noise, and improved wear resistance compared to stock plastic gears
  • Easy installation; a straightforward upgrade to improve steering and crawling dynamics

Real-world use cases include tight rock gardens, ladder courses, and rough off-road trails where precise steering and controlled torque help you maintain momentum. While results vary by driving style and terrain, many users report a more engaging, responsive feel under challenging conditions.

Fitment and compatibility

The gear set is compatible with TRX4M models and fits both the front and rear axles, making it a versatile upgrade for your 1/18 crawler.

Why choose INJORA

INJORA combines precision machining with durable alloy steel to deliver a reliable upgrade. This kit replaces fragile plastic gears with stronger components designed for hobby-level abuse and longer service life.

FAQ

Q: What is included in the INJORA TRX4M overdrive and underdrive gear set?

A: The kit includes CNC machined 12T/22T front overdrive gears and 24T/10T rear underdrive gears, made from 20CrMo alloy steel, with TRX4M installation hardware.

Q: Can this gear set improve steering and crawling on TRX4M?

A: Yes, it can improve steering response and crawling stability by adjusting torque distribution, depending on terrain, with straightforward installation.

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