The Castle Mamba X Waterproof Sensored Brushless Combo with 3800Kv Slate 1406 Motor is ideal for 1:10 scale low speed rock crawlers/trail runners on 2S weighing less than 9lbs. Also a great choice for more aggressive setups in lighter 1:10 scale touring cars, stadium trucks or buggies weighing up to 5lbs. The Castle Creations Mamba X is extremely versatile, and capable of powering a wide variety of applications and vehicles.* The Mamba X is ideal for racing at the track with your 2wd buggy, bashing through mud puddles in your monster truck, or navigating a hardcore trail with your crawler. The Mamba X raises the bar. The Castle "Slate" 1406 Sensored 4-Pole Brushless Crawler Motors are ROCK READY! With super smooth startup and low RPM control, Castle has you covered if you are looking for the ultimate motor for the trails or Ultra 4 track day. *In 1/8th scale setups, the Mamba X is intended to be used for off-road racing in buggies weighing up to 9 lbs (including batteries and ready-to-run). In these 1/8th scale racing setups, the Mamba X should be run at 4S Lipo (16.8V) max and is recommended to be paired with the Castle 1512-1800Kv (P/N: 060-0062-00) or Castle 1512-2650Kv (P/N: 060-0061-00) motor, with appropriate gearing only.