Chasing the Sweet Spot: Pinion and Spur Gear Combinations in RC Ask ten RC hobbyists about the “best” pinion and spur combo, and you’ll probably get ten different answers. That’s because there really isn’t a single “perfect” setup—it all depends on your motor, track, battery, and what you’re trying to… Continue reading
For the Tamiya BT01, this is the max (36T pinion, 55T spur): If there is a gear module (mod) or pitch mismatch between the pinion and spur gear, the meshing of the two gears will be flawed, leading to a number of mechanical problems—some immediate, others more destructive over time…. Continue reading
Using a large pinion gear on an RC car changes the gear ratio, which can significantly affect the vehicle’s performance and durability. While it often leads to higher top speed, it comes with several drawbacks. When you install a larger pinion, you’re effectively increasing the gear ratio, which means the… Continue reading
The choice between metal and plastic spur gears in RC cars depends heavily on performance needs, durability expectations, and driving conditions. Metal spur gears are typically used when strength and durability are top priorities. They can handle high torque and power without stripping or wearing out quickly, making them ideal… Continue reading
In RWD setups, only the rear wheels are driving the car forward. That means the rear tires need to maintain grip under acceleration, cornering, and braking. A low CG keeps the weight closer to the ground, reducing the tendency of the chassis to lift the front and unload the rear… Continue reading
Stock is 61T, and we changed it to 55T. Pinion stays at 25. Stock 540 silver can. Mild speed improvement over 61T + 23T. Seems like upgrading to brushless can give more. No doubt you can use a 29T pinion, and that should make quite a difference, but then the… Continue reading
One very good thing about the BT01 gearbox module is that you can test fit the gears and make sure they mesh well before plugging it back into the chassis. With TT01, TT02 and TA02, easy test fitting of gears is diffult if not impossible. With BT01, it becomes real… Continue reading
Gear ratio is a fundamental concept in RC car performance, balancing acceleration, speed, and torque. Internal Drive Ratio refers to the gear reduction inside the transmission or drivetrain before reaching the final wheels. It is determined by the car’s built-in gearing (e.g., differential and internal gearbox). Final Drive Ratio (FDR)… Continue reading
0.6 Mod is close in size to 48 pitch (imperial measurement) but not identical. They are not interchangeable. 48 pitch gears have a slightly different tooth profile, so using them with 0.6 Mod gears can lead to premature wear or damage. 0.8 Mod (or 32 Pitch) gears are larger and… Continue reading
