Description Basic informationBrand RGTItem No EX86170 PROScale 1 10Color Army green and dark greyPower SystemESC FOC 40A esc Motor Brushless FOC system 1800kv motorSteering Servo Digital metal gear metal shell HV35KG steering servoWinch Servo 360° digital metal gear 25kg steering servoFunctional Servo 7 4V 9G 3P metal gear TransmitterXA8 remote controllerFrequency 2 4GChannel 8CHRemote Distance 100mRequired Battery 4X 1 5V AA battery not included BatteryRecommended Battery 2 3S Lipo or 5 9 cells NIMH battery not included OthersMaterial Plastic hardware and electronic partsCar Weight 3 02kg without battery Gear Ratio Low High 49 8 1 F 53 1 R 26 3 1 F 28 1 R Body Type PC soft with roll cageDrive Mode Front wheel drive 4wdDimensionCar Size 485 258 246mmWheelbase 313mmGround Clearance 70mm classic 54mm steel Wheel 120mm 45mm diameter width Box Size 570 275 282mm Since RGT Challenger was launched at the end of 2022 it has been recognized by the market with its powerful configuration and superior performance In order to further improve and enhance the performance of Challenger RGT will launch totally upgraded version of Challenger to match the market demand Model number EX86170PRO The upgraded Challenger is powered by Hobbywing brushless FOC system WP Fusion BLSYS for Crawler 540 SPEC RTR driven by magnetic orientation control with strong low speed torque and excellent linearity and the motor runs smoothly and quietly with excellent waterproof and dustproof function