INJORA 13T Steel Overdrive Gears for SCX24 AX24 RC Crawler Differential Upgrade

These INJORA overdrive gears replace the stock differential gears in Axial SCX24 series RC crawlers. Made from hardened steel, each set weighs 4g and uses a 13-tooth pinion to deliver approximately 23% more wheel speed compared to the original 16T gears. The overdrive effect helps the vehicle climb steep lines and reduces the chance of tipping backward on obstacles.

What benefits do overdrive gears provide for crawling?

Installing a set of these 13T gears in the front differential shifts more speed to the front wheels. This pulls the chassis forward during climbs and prevents the rear from lifting, a common cause of rollovers on steep grades. The steel construction adds durability without significant weight gain — just 4g per set — so handling changes are minimal. The tooth count is etched directly onto the pinion gear for easy identification.

Compatibility and vehicle fitment

These gears are designed for the Axial SCX24 platform, including the C10, JLU, Gladiator, Bronco, Deadbolt, and the AX24. They fit both front and rear differential housings. Running overdrive in the front with standard or underdrive in the rear is the typical setup for better climbing. If you want overdrive on both axles, you need two sets.

Details and measurements

• Material: Steel
• Weight per set: 4g
• Pinion tooth count: 13T (etched on gear)
• Replaces: Stock 16T differential gears
• Compatible with: SCX24 C10, JLU, Gladiator, Bronco, Deadbolt; AX24

What buyers ask

Does one set cover both front and rear differentials?

Each set includes parts for a single differential. You need two sets to apply overdrive to both axles.

Are these gears a direct replacement for the stock gears?

Yes, they are designed as a direct swap for the original 16T differential gears in SCX24 and AX24 models. The 13T pinion is the only difference in tooth count.

How much faster will my crawler go?

The 13T gears increase wheel speed by about 23% compared to the 16T stock gears. This improves climbing performance rather than top speed.