The ProTek PTK8035 RC Steel Pinion Gear is a high-quality replacement part suitable for various RC vehicles, including cars, trucks, and motorcycles. This pinion gear, with 17 teeth and a 48 pitch, features a 3.17mm bore size, making it compatible with a range of vehicles operating at scales of 1:18, 1:12, and 1:10. Designed for electric vehicles, this pinion gear is durable and reliable, ensuring smooth and efficient gear functionality for hobbyists aged 12 and above. Made by ProTek RC, a trusted brand in the radio control industry, this original new in package component is a valuable addition to any RC vehicle's drivetrain system.