1、RC Metal Steel Spur Gear: Provides Steel 54T 32P spur gear with 15T/17T/19T pinion gear, allowing for multiple gear ratio options for Slash 4x4 4WD/for 2WD/for VXL Rally/for Stampede 4x4 VXL/for Summit/ for T Maxx/for Rustler 4X4 VXL. 2、Inner Diameter: The inner diameter of the 15T/17T/19T pinion gear set is 5.0mm/0.196inch, using the coupler can convert 3 pinion apertures from 5mm/0.196inch to 3.17mm/0.125inch. Suitble for 5mm and 3.17mm shaft motors 3、Smoothly Use: Precise machined RC metal spur gears ensure smoothly and quiet use, minimizing noise and vibration. Provides a seamless driving experience for all RC car enthusiasts. 4、Customizable Gear Ratios: Offers 3 different pinion gear options for personalized gear ratios. Allows users to fine tune their RC car's speed and performance according to their preferences. 5、Excellent Quality Steel Material: Made of robust steel material for enhanced strength and durability. Ensures long lasting performance and reliability during high speed racing and rough terrains. Item Type: RC Metal Steel Spur Gear Material: Steel Application: for Slash 4x4 4WD/for 2WD/for VXL Rally/for Stampede 4x4 VXL/for Summit / for T Maxx/for Rustler 4X4 VXL. 2 x 54T Gear 2 x 15T Gear 2 x 17T Gear 2 x 19T Gear 10 x Accessories 2 x Hex Wrench Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store