Application of the Justock 3650 SD G2.1 motor is for the Stock or Sport Class of 1/10th, 1/12th on-road and off-road racing, normal training and rock crawlers. - Built-in hall sensor, non-adjustable end bell is combined with a high precision and balanced rotor. - Silicone O-ring seal is fitted between the end bell and stator. - IFMAR and ROAR approved - LiPo: 2-3S - Diameter: 35.9mm - Length:52.5mm - Weight: 176g - No-Load Current: 3.5A - Max Output Power: 157W