RcThjia 5Pcs 48P Aluminum Alloy Pinion Gear Set 3.175mm 33T-37T for 1/10 RC Cars, with M4 Screw and Hex Key
RcThjia 5Pcs 48P Aluminum Alloy Pinion Gear Set 3.175mm 33T-37T for 1/10 RC Cars, with M4 Screw and Hex Key
This RcThjia 5-piece pinion gear set gives you five tooth counts from 33T to 37T, all with a 3.175mm bore and 48P pitch. Made from aluminum alloy, these gears are built for 1/10 scale RC vehicles and fit most 540/550 motors with 3.175mm shafts. They work with popular brands like Traxxas, Axial, Arrma, HPI, Kyosho, Losi, and Tamiya models.
What’s in the Set and How to Use Them
The set includes pinion gears with 33, 34, 35, 36, and 37 teeth. Each gear has a 3.175mm bore and uses a 48P metric pitch to mesh with standard spur gears. You also get an M4 setscrew and a hex key for mounting. Swapping gears lets you adjust your RC car’s gear ratio: fewer teeth give more torque for crawling, more teeth increase top speed on track days.
Aluminum Alloy vs. Steel – What It Means for Your RC Car
These gears are CNC-machined from high-strength aluminum alloy. Compared to traditional steel pinions, they are lighter, which reduces rotating mass and helps the motor spin up faster. The aluminum also has a surface treatment that resists wear and deformation during bashing, crawling, or racing. While steel gears may last longer in extreme abuse, aluminum offers a performance advantage for many 1/10 scale setups.
How This Gear Set Improves Drive Experience
Precision machining ensures each gear engages smoothly with your spur gear. That means less noise and vibration under load, so your car runs quieter even during hard acceleration. The smooth mesh also delivers consistent power transfer from the motor to the drivetrain, giving you more predictable handling.
Specifications at a Glance
| Number of Pinions | 5 |
| Tooth Counts | 33T, 34T, 35T, 36T, 37T |
| Bore Diameter | 3.175mm (1/8-inch) |
| Pitch | 48P (metric) |
| Material | Aluminum alloy |
| Included Hardware | M4 setscrew, hex key |
| Compatible Motor Shafts | 3.175mm (540/550 size) |
| Compatible Models | 1/10 scale trucks, buggies, crawlers, monster trucks |
| Brand Compatibility | Traxxas, Axial, Arrma, HPI, Kyosho, Losi, Tamiya TT01/TT02, and others |
Frequently Asked Questions
Will these gears fit my Traxxas Stampede?
Yes, they fit 1/10 scale Traxxas models that use a 48P pitch and 3.175mm motor shaft. Always check your spur gear pitch (48P) before installing.
Can I use these with a brushless motor?
Yes. The 3.175mm bore fits most 540/550 brushless and brushed motors with that shaft diameter.
Are these gears compatible with 32P spur gears?
No. They are 48P pitch and require a matching 48P spur gear. Using them with 32P will cause poor mesh and damage.
What size hex wrench is included?
The set comes with a hex key that fits the M4 setscrew included.