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Injora has released a new series of Steel Helical Gears for the Traxxas TRX-4M. Whether you want a replacement for the TRX-4M’s stock, plastic gears, or you’d rather apply overdrive or underdrive to your small-scale crawler, these gear options should have you covered. While there are other ways to adjust the speed and torque of your TRX-4M, these gears apply change [...]
Whenever you wanna get really serious about fine-tuning the way your scale crawler handles, overdrive and underdrive gearing is something you absolutely should look into. I know that this can be confusing for some, so here’s a quick explanation for how it works. Overdrive (OD) and underdrive (UD) are measured by using the stock ring and pinion as a baseline. OD [...]
When it comes to scale crawling hop-up discussion, over/underdrive gears never fail to confuse noobs. What does “overdrive” even mean? Will it hurt your truck? Click the “Read More” below to get the skinny on a mod that can help your Axial truck get its Billy Goat on.
