Ideal for running up to 8s LiPo in 1:8 and 1:7 scale vehicles, the mechanical design boasts a stainless-steel sleeve to reinforce and strengthen the rotor for high RPM operation. Coupled with a massive 8mm stainless steel motor shaft, 8.0mm bullets and high strand, low resistance, silicone coated 8 gauge copper wire, the 1721-2400Kv will deliver massive power and maximum top end speed.

• Runs in SmartSense™ Sensored mode or an ultra-efficient Sensorless mode
• Maximum 90,000 RPM
• LiPo voltage range of 4S to 8S

• Water Resistant Design: The sensor board is coated with silicone conformal coating to protect the sensors from moisture. The sensor connections are not water resistant; water can cause signal loss which could result in loss of sensored capabilities. Castle recommended applying dielectric grease to the outside of the sensor wire connections after installation of the wire. Routine maintenance is recommended after running in wet conditions. Please refer to this document for running and maintaining motors in wet environments.