RcThjia 5-Pack 64P Aluminum Pinion Gears (46T-50T) for 3.175mm Shaft - 1/10 RC Car Upgrade

This 5-piece pinion gear set from RcThjia gives you five aluminum alloy pinions with 46, 47, 48, 49, and 50 teeth, all with 64P pitch and a 3.175mm bore. Designed for 1/10 scale RC cars, these gears fit brushless and brushed 540/550 motors and are compatible with popular brands like Traxxas, Axial, Arrma, HPI, Kyosho, Losi, and Tamiya. The set includes M4 screws and a hex key, making it easy to swap ratios for tuning speed or torque.

Five tooth counts for ratio tuning

Having five different pinions (46T, 47T, 48T, 49T, 50T) lets you adjust the gear ratio of your RC car. A lower tooth count (46T) gives more torque for crawling or acceleration, while a higher count (50T) increases top speed for racing on flat tracks. This set covers a useful range without buying individual gears.

Broad compatibility with 1/10 scale models

These pinions are made for 3.175mm (1/8-inch) motor shafts and work with most 540 and 550 motors, both brushed and brushless. They fit a wide range of 1/10 scale trucks, buggies, crawlers, and monster trucks from major brands including Tamiya TT01/TT02, Traxxas, Axial, Arrma, HPI, Kyosho, and Losi. Always check your spur gear pitch – these are 64P, so they need a 64P spur gear for proper mesh.

Precision 64P pitch and smooth operation

The 64P metric pitch ensures accurate tooth engagement with matching spur gears. CNC machining from aluminum alloy keeps each gear lightweight but strong. The surface treatment helps resist wear. Users often notice quieter operation compared to steel pinions, with less vibration under load.

Technical details at a glance

What is 64P pitch and why does it matter?

64P means 64 teeth per inch of pitch diameter. It's a common standard for 1/10 scale RC cars. Using a 64P pinion with a 64P spur gear gives correct gear mesh, reduces noise, and helps avoid stripped teeth. Always match the pitch of your spur gear.

Will these pinions fit a 3.175mm motor shaft?

Yes, the bore is precisely 3.175mm (1/8-inch). Most 540 and 550 motors have this shaft diameter. The included M4 set screws secure the gear onto the shaft's flat spot.

What does the set include besides the gears?

Each pinion comes with an M4 set screw and a hex key is included to tighten them. You have everything needed to swap gears on your RC car.

Can I use these for a 1/10 crawler or rock racer?

Yes, the 46T or 47T pinion works well for crawling setups where low-speed torque is important. The aluminum construction keeps rotating mass low, which helps with throttle response.