SURPASS HOBBY 3.175MM 13T 14T 15T 16T 17T Pinion Gear Set for 1/8 1/10 RC Motor

Teeth: 13T 14T 15T 16T 17T. Fly Wing FW450L V3 RC Helicopter Parts Battery Motor ESC Servo Belt Gear Rotor. Surpass Hobby Rocket 540 V3 Brushless Motor 5.5T -21.5T For 1/10 1/12 F1 RC Car. 17T: 11.4mm.

eBay