INJORA 4M-109UD Acrylic Transmission Underdrive Gears Crawle 1/18

( Brand: Injora ), ( Manufacturer Part Number: 4M-109UD ), ( Age Range Description: Kid ), ( Manufacturer Maximum Age: 120.0 ), ( Directions: Replace The Existing Transmission With This Upgrade Transmission. ), ( Size: 40.3/1 ), ( Target Gender: Unisex ), ( Color: Transparent ), ( Battery Description: No Batteries Required ), ( Operation Mode: Automatic ), ( Power Source Type: No Power Source ), ( Material: Acrylic, Stainless Steel ), ( Refund: Accept 30 Day Refund ), ( Package Dimensions Lxwxh: 5.0x3.35x0.94 Inches ), ( Weight: 0.07 Pounds )

Review INJORA Acrylic Complete Transmission Underdrive Gears For 1/18 Rc Crawle

Introducing the INJORA 4M-109UD Acrylic Transmission Underdrive Gears, a must-have accessory for your 1/18 scale crawler. These underdrive gears are specifically designed to provide improved torque and better efficiency for your RC vehicle.

The INJORA 4M-109UD gears are made from high-quality, clear acrylic material. This material offers several advantages over traditional metal gears. First, it is lightweight, which can help reduce the overall weight of your crawler and improve its agility on the trail. Second, acrylic gears generate less heat than metal gears, which can help extend the life of your transmission and other components. Third, the clear material allows you to easily see the gears in action, adding a visual element to your RC hobby.

These underdrive gears feature a 3:1 gear ratio, which can help increase the low-end torque of your crawler. This is particularly useful in off-road situations where you need maximum power to climb hills or navigate rough terrain. The gears are also precision-machined for a perfect fit, ensuring smooth operation and reducing the risk of damage or wear.

Installing the INJORA 4M-109UD gears is a straightforward process. They are designed to fit directly into the transmission case of most 1/18 scale crawlers. Simply remove the stock gears, clean the transmission case, and install the new underdrive gears. It's recommended to use a high-quality RC transmission oil to ensure proper lubrication and longevity of the gears.

In summary, the INJORA 4M-109UD Acrylic Transmission Underdrive Gears are a great investment for any RC crawler enthusiast. They offer improved torque, better efficiency, and a visual appeal that adds to the enjoyment of the hobby. Whether you're a seasoned RC veteran or just starting out, these gears are sure to enhance your off-road experience.

Injora's 4M-109UD acrylic transmission underdrive gears are a popular upgrade for 1/18 scale RC crawlers. These gears offer several benefits and drawbacks that are essential to consider before making a purchase.

1. Durability: Acrylic gears are known for their durability and strength. They are less prone to breaking or cracking compared to standard plastic or metal gears. Injora's acrylic gears are specifically designed for RC crawling and can handle the high torque and stress that comes with the hobby.

2. Lower Gearing: Underdrive gears provide a lower gear ratio, which results in more torque and improved crawling performance. This is especially beneficial for RC crawlers that need extra power to climb steep inclines or traverse rocky terrain.

3. Quieter Operation: Acrylic gears are quieter than metal gears, which can be a significant advantage for RC crawlers that operate in noise-sensitive environments.

4. Aesthetic Appeal: Acrylic gears have a unique, translucent appearance that can enhance the visual appeal of an RC crawler.

1. Cost: Injora's 4M-109UD acrylic transmission underdrive gears are more expensive than standard plastic or metal gears. This may be a significant consideration for budget-conscious RC crawler enthusiasts.

2. Weight: Acrylic gears are denser than plastic gears and slightly heavier than metal gears. This added weight can affect the overall performance and handling of the RC crawler.

3. Customization: Acrylic gears are not as easily customizable as metal or plastic gears. This can limit the ability to fine-tune the gear ratio or modify the gears for specific applications.

Injora's 4M-109UD acrylic transmission underdrive gears offer several benefits, including improved durability, better crawling performance, quieter operation, and aesthetic appeal. However, they also come with drawbacks, such as increased cost, added weight, and limited customization options.

If you are looking for a durable and high-performance upgrade for your 1/18 scale RC crawler and are willing to invest in the higher cost, Injora's 4M-109UD acrylic transmission underdrive gears are a great choice. They can help improve your crawler's torque, handling, and overall performance on challenging terrain. However, if you are on a tight budget or prefer customizable gears, you may want to consider alternative options.

Details:

Package List. 24g/each, Compatible with stock and aftermarket skid plate. 40.3/1 underdrive gears decrease speed approx 59%. Housing Material: Acrylic.

Gear Material: Stainless steel. 9.7/1 overdrive gears increase speed approx 71%. 16.6/1 gears do not change the speed, same as stock.

Stainless steel gears with acrylic housing.

part #: 4m109ud prices

• $40.98-$43.99

specifications rcparta:

• brand: Injora
• mpn: 4m-109ud
• age range description: Kid
• manufacturer maximum age: 120.0
• directions: Replace The Existing Transmission With This Upgrade Transmission.
• size: 40.3/1
• target gender: Unisex
• color: Transparent
• battery description: No Batteries Required
• operation mode: Automatic
• power source type: No Power Source
• material: Acrylic, Stainless Steel
• refund: Accept 30 Day Refund
• package dimensions lxwxh: 5.0x3.35x0.94 Inches
• weight: 0.07 Pounds

general rcparta:

• condition: New
• Radio Control Control Line > RC model Vehicle Parts Accs > Other RC Parts Accs

offer rcparta:

• availability: In Stock
• quantity: 1
• options: Ship-to-home
• sold: 0
• started: February 27, 2026

returns rcparta:

• policy: Returns Accepted
• method: Money back
• paid by: Seller
• time: 30 Days

shipping rcparta:

• cost: $0.00
• class: Standard
• type: Fixed
• service: Standard
• transit: 4-10 Days

seller rcparta:

• # reviews: 495
• city: West New York, New Jersey
• rating: 99.0%

payments rcparta:

• other
• wallet: Google-pay
• credit card: Discover

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