1、PROFESSIONAL DESIGN: RC differential gear set is designed for more efficient reduction of power for speed changes to provide a smoother ride, lower RPM and higher torsion. 2、15T 17T 19T: RC pinion gear set offers 3 different pinion gears with different tooth counts and speeds depending on your gear ratios, giving you more options in gear ratios. 3、IMPROVE CAR PERFORMANCE: 15T 17T 19T gear set effectively improves the performance of the car, acts as a deceleration, increases engine torsion, and allows the RC car to drive smoothly. 4、PRECISE SHAPE: RC car differential gear set has a precise shape and size manufacturing to provide a balanced ride and maximize the deceleration performance of RC cars. 5、WEAR RESISTANT: RC car motor pinion gear set is made of aluminum alloy and steel material, which is durable, resistant to wear and tear and high strength, thus extending the service life. 6、ANTI RUST TREATMENT: The surface of RC motor pinion gear set is treated with anti rust treatment, which can directly replace the original or damaged parts for higher strength. Item Type: RC Differential Gear Set Material: Aluminum Alloy, Steel Number Of Teeth Of Differential Gear: 54T Number Of Motor Teeth: 15T 17T 19T Gear Pitch: 32P 0.8M Center Hole Diameter: Approx. 5.0mm/0.20in 15T Size: Approx. Diameter 13.2x13.5mm / 0.52x0.53in 17T Size: Approx. Diameter 15x14mm / 0.60x0.55in 19T Size: Approx. Diameter 16.5x14mm / 0.65x0.55in Differential Gear Size: Approx. 61x45mm / 2.40x1.77in Suitable For Traxxas Slash, For Stampede, For Rustler, For VXL, For XL5 1 x 54T RC Differential Gear 3 x Motor Gear 3 x Coupler 3 x Grub Screw 1 x Wrench