The Tekin RS Gen3 Sensored Brushless ESC/Gen4 Modified Motor Combo is a competition ready racing package. Utilizing the best materials available the GEN4 has been redesigned to cut weight and reduce resistance, resulting in a purebred racing machine. A perfect choice for any discipline, the GEN4 delivers smooth power and control across the full RPM range. The SPEC-R is competition performance with the speed you need to win. The GEN4 motor line features a redesigned, precision stamped and pressed stator to increase efficiency and reduce resistance. The stators are hand-wound with high purity copper wire and machined from 6061-T6 aluminum. The motors can be tuned with optional rotors and are re-buildable, making the GEN4 motor a premium performance power plant designed for the serious racer. Maintain superior control in all situations with state-of-the-art components, award-winning performance and proven reliability. The RS GEN3 gives you the tools to win! 60 Degrees Adjustable Timing Advance. Modified Racing Specific Design. CNC Machined 6061-T6 Billet Aluminum Heat Sink Can. Precision Engineered for Maximum Energy Conversion. High Purity Copper Windings Maximize Conductivity. Low Resistance, High Power Solder Tabs. Anodized End-bell Plates Maximize Corrosion and Wear Resistance. High RPM Precision Bearings. Solder-less Sensor PCB Replacement. Legal in Major Race Governing Bodies. QuickTuneT One Touch Programming. HD Solder Post Design. 3rd Channel Input for On-The-Fly Drag Brake Adjustments. Adjustable Throttle and Brake Frequencies. High Voltage Programmable BEC. ESC Self Diagnostics with Error Codes. Brushless and Brushed Motor Drive. Sensored or Sensorless Operation. LiPo Safe with Custom Voltage Cutoffs. Sensor Plug for Precise Commutation. HDAC: High Density Copper PCB’s. Ultra-smooth and Precise Throttle and Braking Control. Input Voltage: 1-2S LiPO – 9.5T / 8.5T / 7.5T / 6.5T / 5.5T. Weight: 5.1oz / 145g. Shaft Dimensions: 3.18mm (1/8) x 15.3mm. Motor Diameter: 35.85mm / 1.40. Motor Length: 50.25mm / 1.978. Max Operating Temperature: 180°F / 82°C. Bearing Dimensions: Front: 4x13x5mm; Rear: 1/8×3/8×5/32. Rotor Size: 12.5mm GREEN. Input Voltage: 2S-3S LiPo / 4-9S NiMH-NiCD. Motor Limit Brushless Mode: 2S – 8.5T 2-pole 36mm Can, 3S – 10.5T 2-pole 36mm Can. Motor Limit Brushed Mode: 2S – 10T 36mm Can, 3S – 20T 36mm Can. Max Current: 140amps per phase. Dimensions: 1.0 x 1.3 x. 51 / 24.5 x 34 x 12.9mm. 83oz / 23.5g.