Elevate your RC car performance with this high-efficiency 3650 3900KV Brushless Motor and ESC Set, crafted from durable alloy for exceptional strength and longevity. Designed for optimal power delivery, the 3900KV motor delivers up to 900W with a maximum RPM of 50,000 under voltages below 13V, providing superior speed and torque for advanced RC applications. Choose from multiple ESC options—45A, 60A, 80A, or 120A—to perfectly match your power requirements and driving style. Key Features: · High-Performance 3650 3900KV Brushless Motor: Produces up to 900W power with a max RPM of 50,000, ideal for racing and high-speed RC vehicles. · Versatile ESC Options: Select from 45A, 60A, 80A, or 120A Electronic Speed Controllers (ESC) featuring continuous and burst current ratings to suit different battery setups and power needs. · Reliable BEC Output: All ESCs provide a stable 5.8V / 3A Battery Eliminator Circuit (BEC) to efficiently power your RC system. · Waterproof and Durable ESC Design: The 60A ESC is waterproof for enhanced durability, while all ESCs utilize high-quality connectors (T plug male and 4mm or 5mm banana plugs) for reliable electrical connections. · Complete Set with Heat Sink and Program Card: Includes a heat sink for effective thermal management and a portable, user-friendly RC car brushless ESC program card for easy tuning and optimization. · Precision Engineering: Motor dimensions include a 36mm diameter, 50mm length, and a 15mm axle length with 3.175mm diameter for straightforward installation and compatibility. · Wide Battery Compatibility: Supports 2-3S LiPo and 4-12S NiMH batteries depending on ESC choice, offering flexible power options to enhance RC vehicle performance. Specifications: Motor: · Type: 3650 Brushless Motor · KV Rating: 3900KV (RPM per Volt) · Power: 900W · Max Voltage: <13V · Max RPM: 50,000 · Max Ampere: 69A · Diameter: Approx. 36mm / 1.42in · Length: Approx. 50mm / 1.97in · Axle Length: Approx. 15mm / 0.59in · Axle Diameter: Approx. 3.175mm / 0.13in · Plug: 4mm Golden Banana Plug ESC Options: · 45A ESC: Continuous 45A, Burst 180A, Battery: 2-3S LiPo / 4-9S NiMH · 60A Waterproof ESC: Continuous 60A, Burst 320A, Battery: 2-3S LiPo / 4-9S NiMH · 80A ESC: Continuous 80A, Burst 480A, Battery: 2-3S LiPo / 4-9S NiMH · 120A ESC: Continuous 120A, Burst 480A (10 sec), Battery: 2-3S LiPo / 4-12S NiMH · All ESCs feature 5.8V / 3A BEC Output Program Card Features: · Lightweight and portable design for easy programming · Specifically designed for brushless ESC tuning to optimize performance Package Includes: · 1 x 3650 3900KV Brushless Motor · 1 x ESC (Choose from 45A, 60A, 80A, or 120A) · 1 x Heat Sink · 1 x Brushless ESC Program Card This comprehensive RC Motor and ESC Set is a practical modification accessory, engineered to significantly improve the efficiency, speed, and control of your RC cars. Its high-quality alloy construction and advanced features make it the ideal upgrade for hobbyists and professional RC racers seeking enhanced reliability and outstanding performance.