This 48P motor pinion gear set is designed for RC car motors with a 3.175mm (1/8”) shaft, providing stable and efficient power transfer within the drivetrain system. Each set includes five pinion gears with different tooth counts (see selected style), allowing precise gear ratio tuning for improved torque or speed based on vehicle setup and driving conditions. Manufactured from hardened steel, these pinion gears offer enhanced wear resistance and durability, making them suitable for repeated gear mesh adjustments and long-term use. Compatible with RC vehicles using 48 pitch spur gears. Please confirm gear pitch and motor shaft diameter before installation.