SkyRC ARESPro 540 4100KV 8.5T Dual Sensor Port Brushless Motor is designed to provide both quality and performance at an affordable price. It is built from high quality aluminum alloy which is produced from the latest CNC milling machines, and is designed with high power and rotation speed to provide longer run time with its high efficiency. 

Features: 
CNC machined billet T6 aluminum heatsink can 
High purity copper windings maximizes conductivity 
High power solder tabs 
Removable/Replaceable rotor 
Powerful sintered neodymium magnet 
Precision engineered for maximum energy conversion 
Dual sensor port 
Incorporate radial fan in front end bell 
Adjustable timing 
Compatible with any sensored/ sensorless ESC 
IFMAR, ROAR compliance 

Specifications: 
Brand: SkyRC 
KV: 4100KV 
Power supply: 1S / 2S / 3S LiPo battery 
Max current: 80A 
Watts: 340W 
Rotor poles: 2 
Turns: 8.5T 
Unload current: 3.2A 
Internal resistance: 0.0138 Ohm 
Weight: 178g 
Outer diameter: 36mm 
Length: 54mm 
Shaft length: 12.5mm 
Shaft diameter: 3.175mm 
   
Package Information: 
Package size: 14 * 10.6 * 5cm / 5.4 * 4.2 * 2in 
Package weight: 210g / 7.4oz 
Brand gift box package 

Package List: 
1 * SkyRC 540 8.5T Brushless Motor