I'm not understanding how these work. Wouldn't changing the front and rear gear ratios just cause the truck to bind?

Good question. If you were to drastically change the front and rear ratio (super overdrive front and rear), it would cause issues but not bind. The slight increase spin of the front tires causes the truck to pull more front the front, instead of push more from the rear. This is very helpful when going over obstacles and on hill climbing

12t 22t Overdrive And 24t 10t Underdrive Steel Helical Gear

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

€ 53.32

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Croatia.

Secure transaction

Description

⚡ Upgrade your crawl game with precision and power!

SILENT STRENGTH - Helical gear design drastically cuts down noise and vibration for a premium driving experience.
BUILT TO OUTLAST - Alloy steel construction resists wear far better than stock plastic gears, keeping you ahead of the pack.
TERRAIN MASTERY UPGRADE - Optimized overdrive and underdrive ratios boost crawling and steering on complex terrains.
PLUG PLAY INSTALLATION - Easy fitment for TRX4M front or rear axles—upgrade your RC crawler in minutes.
PRECISION ENGINEERED POWER - CNC machined alloy steel ensures unmatched durability and smooth performance.

This 12T/22T overdrive and 24T/10T underdrive helical gear set is CNC machined from durable 20CrMo alloy steel, designed to replace stock plastic gears on TRX4M 1/18 RC crawler cars. It reduces noise and vibration while providing a 9% overdrive to the front axle and a 16.7% underdrive to the rear axle, enhancing steering and crawling performance on challenging terrains. Easy to install, this upgrade is recommended for users aged 14 and above.

Specifications

ASIN	B0BZLBWSRV
Age Range Description	Kid
Best Sellers Rank	#101,911 in Toys & Games ( See Top 100 in Toys & Games ) #45 in RC Vehicle Transmission Gears
Brand Name	INJORA
Color	Black
Customer Reviews	4.4 out of 5 stars 214 Reviews
Educational Objective	Game, play
Item Dimensions	3.9 x 0.79 x 2.8 inches
Item Weight	0.02 kg
Manufacturer	INJORA
Manufacturer Part Number	4M-10-34B
Manufacturer recommended age	0 - 5 years
Material Type	Steel
Model Number	4M-10-34B
Number of Players	1
Operation Mode	Manual
Set Name	Overdrive & Underdrive Gear Set
Size	12/22T&10/24T
Theme	Car
Unit Count	2 Count

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

€ 53.32

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Croatia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Reema J.

Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

View all Trustpilot reviews

12T/22T Overdrive & 24T/10T Underdrive Steel Helical Gear for TRX4M

Description

Specifications

Common Questions