The first motor (in the world) with a built-in chip which helps esc identify it's a hobbywing motor (when pairing with xerun xr8/xr8 plus) and form a power system which can work in the ""full-sensored"" mode and provide users with the better performance and smoother control. The first ""error-free"" hall sensing system (hobbywing's patent) (in the rc field) adopted by this motor guarantees users the steady operation in the ""full-sensored"" mode. A separate high-speed high precision encoder always output the clean signals (indicate the rotor's location) and not be affected by other signal interference. Cnc-machined aluminum ribbed heatsink case with the sensor port covered by silicon o-ring seal guarantees users the effective heat dissipation and dust prevention. New-style u gold-plated tabs with extremely-low internal resistance allows users to solder output wires easily and firmly on. This motor is not only applicable to popular 1/8th scale racing vehicles like cobra e-truggy, tlr 8ight-e 3. 0, ae rc8. 2e, team c dex8t and serpent-977e, but also other trucks, buggies, touring cars, etc. Hobbywing xerun 4268sd g2 features: full-sensored mode turbo timing technology bi-directional adjustable timing advanced hall sensing system low cogging torque quality materials & excellent design spec check: scale: 1/8th brushed/brushless: brushless sensored/sensorless: sensored pole count: 4 kv rating: 1600 lipo cells: 2-6s no-load current(a): 2. 8 timing: 20-40 degrees(adjustable) o. D. (mm): 42. 0 length (mm): 68. 0 shaft diameter (mm): 5. 0 weight (g): 322 (hw30401900)