Universal Mod 1 Pinion Gear 21T 8mm Bore Hardened Steel Motor Rack Spur Gear for RC Car Truck Buggy Upgrade with Step for Smooth High Torque Gear Drive and Beefed Up Performance

1x Mod 1 Pinion Gear 21T 8mm Bore for RC Cars
✔️ 21T Mod1 pinion with 8mm bore, high-frequency hardened steel

This Mod 1 pinion gear is a 21-tooth, 8mm bore pinion made from 45# carbon steel. It's designed to pair with Mod 1 spur gears on RC cars, trucks, and buggies for upgraded, high-torque drive and smoother performance.

✅ Teeth: 21T
✅ Pitch: 3.14mm
✅ Bore: 8mm; Outer diameter: 23mm
✅ Thickness: 18mm; Gear step: 17mm x 8mm
✅ Material: 45# steel
✅ Surface treatment: High-frequency quenching
✅ Includes grub screws for secure mounting
✅ Fits Mod 1 spur gear with the same pitch
✅ Package contents: 1 pinion gear, 2 grub screws

💡 What is a pinion gear used for in RC vehicles and how does an 8mm bore Mod 1 pinion help?

This handy drive gear turns motor torque into wheel motion by meshing with a compatible spur gear, allowing you to tune drive ratios and torque delivery for different RC setups. - It is a basic drivetrain component that connects the motor shaft to the spur gear - Uses Mod 1 pitch and 8mm bore to match common RC spur gears - Helps control acceleration, torque, and speed in RC cars, trucks, and buggies