







⚙️ Elevate your crawl game—because slow and steady wins every rock battle!
The INJORA 15g Stainless Steel 40.3:1 Low Range Transmission Gear Set is a premium upgrade for the TRX4M 1/18 RC Crawler, featuring CNC-machined stainless steel gears that deliver exceptional durability and rust resistance. Its ultra-low gear ratio maximizes torque for superior rock crawling performance, backed by a strong 4.8-star rating and proven long-term reliability among RC enthusiasts.






| ASIN | B0C1CTWH9X |
| Age Range Description | Unisex Adult |
| Best Sellers Rank | #187,180 in Toys ( See Top 100 in Toys ) #40 in RC Vehicle Transmission Gears |
| Brand Name | INJORA |
| Color | Silver |
| Customer Reviews | 4.8 out of 5 stars 546 Reviews |
| Educational Objective | Develop problem-solving skills through convenient assembly and operation of mechanical systems. |
| Included Components | Gear |
| Item Dimensions | 10 x 7 x 2 centimeters |
| Item Type Name | RC Gear |
| Manufacturer | INJORA |
| Manufacturer Minimum Age (MONTHS) | 168.00 |
| Material Type | Stainless Steel |
| Number of Players | 1 |
| Operation Mode | Automatic |
| Power Source | Battery |
| Size | 40.3:1 |
| Subject Character | RC Gear |
| Supported Battery Types | No batteries required |
| Theme | RC |
| Unit Count | 1 Count |
N**B
Ottimo upgrade
Perfetti, lavorati benissimo. Ottimi.
D**E
2 years in, still recommend.
TL;DR Only one run, so far so good. Running brushless Furitek. Update March 2025. Almost 2 years on these gears and still working great. Still highly recommend this if you want to rock crawl. Too slow for trail or general purpose driving, but a must have if you’re looking for more torque and slow speed crawling. I’ve had no issues out of these gears (or anything on my 4M for that matter) Update: April 2024, 1 year later still runs like the day I installed. I don’t drive it every day but at least a couple times per week. Would buy again. Original review: Installed in my Bronco running bearing kit and the Furitek brushless motor/esc. Gears dropped right in no fitment issues. There has been a clicking ever since installing the new motor but the plastic crawler gears from Traxxas also made a clicking. So I just run it. Worth noting though. These gears appear to be nicely machined. If you’re into rock crawling with your TRX4m, I’d suggest this as your first upgrade along with bearings second. Those two upgrades even on the stock motor and electronics make it a whole new truck. The torque of the stock motor is actually pretty good with the crawl gears. I bought these injora gears because I thought that I had stripped the plastic ones causing them to click when driving, turns out these click too. The quality of injora parts is excellent. I’m also running their brass differential covers front and rear. So far these are a 5 star all day. If anything happens, I’ll update my review.
G**J
Fait le taf
Très bonne compatibilité. Mais le trx-4m est devenu beaucoup plus bruyant. C'est dommage.
M**H
Sehr gutes Produkt
Passen perfekt und Auto fährt langsamer
G**❤
Good
Perfect thanks
Trustpilot
2 months ago
1 month ago