Sidewinder 4 Sensorless ESC & 1406 7700KV Brushless Motor Upgrade for 1/10 RC V. 4 x 3 x 1.3 inches. 10 years and up. Brushless power from the leader in aftermarket upgrades, the Sidewinder 4 builds upon Castle’s most popular platform, the SIDEWINDER 1:10 SCALE SERIES. The Sidewinder line of ESCs are our Sport-Class Surface Speed Controllers. They’re designed to withstand the most abusive environments while keeping your ride moving fast and cool. They are sensorless and have loads of Castle Power! CRYO-DRIVE TECHNOLOGY combines cutting-edge hardware and software advancements to significantly increase thermal performance by reducing the amount of time the ESC’s electrical components spend generating heat. Your setup will be able to handle higher gear ratios, in heavier vehicles, with longer runs. COOLER TEMPS mean LONGER RUNS and MORE POWER in your SIDEWINDER 4 setup. This pairing is perfect for 1/10th scale on-road cars for 2s use. It can also be used in some lighter off-road 1/10th stadium trucks and buggies with conservative gearing. Please note, it is not for use in 2WD or 4WD short course trucks. Maximum recommended vehicle weight for this combo is no more than 5lbs with battery, ready-to-run. Our 4-pole 12-slot motor designs boast exceptional efficiency, and the oversized NMB bearings and vibration dampening system ensure the longest bearing life possible. High-strength, high-temperature grade neodymium sintered magnets combined with a high-strength Kevlar wrap ensures the integrity of the rotor is not compromised during harsh running conditions. You will reap the benefits of longer run times on one battery and a cooler running motor that can be pushed harder. SEND IT with a SIDEWINDER! We offer the best prices around on high quality products. Our E-store includes media such as books, movies, music and games while offering electronics, toys, sporting apparel, clothing, tools, general home, garden items and more. We are always working hard to ensure your package arrives as soon as possible. We do not accept P. Please provide a physical address. We try our very best to make sure every customer is completely satisfied. If there’s a problem, message us! We’re happy to help.