Firma 2100Kv Brushless Sensored Crawler Motor (SPMXSM3001)

Firma 2100Kv Sensored Brushless Crawler Motor is a high-performance powerplant designed for 1/10-scale crawlers, rock racers, and trailers powered by 2S–3S LiPo packs. It features a low-cog 4-pole, 8-magnet rotor, CNC-machined aluminum housing, insulated high-purity copper windings, and a precision 3.175 mm (1/8") output shaft with durable bearings for smooth rotation. Preinstalled with 3.5 mm gold-plated bullet connectors for easy installation. This motor serves as an excellent upgrade from 540 brushed motors with the same diameter and mounting pattern, provided the vehicle accepts pinions with a 1/8-inch bore. A Spektrum FIRMA 60A Sensored Brushless Smart Crawler ESC is required for operation.

Designed to balance speed and torque for trail and scale crawling, the motor uses a 4-pole sintered rotor and features polarity protection via an integrated magnetic encoder, ensuring consistent rotor-position signals across all three phases. The waterproof sensor wire includes a locking plug and gasket, and the hardened steel 1/8" shaft along with precision bearings delivers durability in rugged terrain. This configuration provides smooth throttle response and efficient power delivery for crawlers upgrading from brushed systems.