This is the Tekin 17.5T Redline Gen2 Sensored Brushless Motor. FEATURES: Ideal for on or off-road applications Legal in major governing racing bodies Dual plug sensor wire harness for all sensored and sensoreless systems CNC machined T 6061 billet aluminum heatsink can with anodized endbell plates High RPM precision bearings High purity copper windings Adjustable timing Neodimium sintered magnet INCLUDES: Tekin 17.5T Redline Gen2 Sensored Brushless Motor with Sensor Wire SPECS: Weight: 6.2oz (177g) Shaft Dimensions: 5 x 15.3mm Motor Diameter: 1.40" (35.85mm) Motor Length: 2.03" (51.8mm) Bearing Dimensions: front: 4x13x5mm rear: 1/8x3/8x5/32" kV: 2400 Rotor: 12.5mm jxs 11/05/12 ir/jxs