The Maclan DRK Drag Race King Drag Racing Modified Brushless Motor is a 100% hand built modified motor optimized for drag racing. Starting with the successful Maclan V2 platform, the DRK features various updates and improvements that make it an application specific drag race motor that pairs best with the Maclan DRK 160 ESC. IMPORTANT Tips: DRK 160 ESC preset profiles are based on 20 degree motor can timing. For best results, set motor can timing to 20 degrees or lower. When installing the DRK ESC, please set radio to factory settings, or use a new, unused model. Using “radio tricks” for throttle manipulation is unnecessary and could cause problems with the ESC, resulting in poor performance, or a damaged ESC. The DRK ESC is designed to replace all other methods of manipulating the throttle. Features: Engineered & Developed right here in the U.S.A. 100% hand built Available in 4.5T and 3.5T 13mm DRK Ultra High Torque Rotor (MCL4218) Precise aligned sensor gap for most accurate reading All aluminum screws Best to pair with DRK 160 ESC Specifications: Available Turns: 3.5/4.5 Case Length: 2.02in/51.50mm Case Diameter: 1.42in/36mm Shaft Extension: 0.552in/14mm Shaft Size: 3.17mm Weight: 3.5T@152g/ 4.5T@158g Poles: 2 Poles Default Rotor: MCL4218 13mm Ultra High Torque (Black)