Check the listing for details. Spektrum Firma 2100Kv Brushless Sensored Crawler Motor (SPMXSM3001). Condition: New. Listed at 129.99 USD. New in package Spektrum Firma 2100Kv Brushless Sensored Crawler Motor (SPMXSM3001) The Spektrum FIRMA 60A Sensored Brushless Smart Crawler ESC is required to complete this package. The Spektrum RC Firma Sensored 540 Brushless Crawler Motor is a great choice for 1/10 scale crawlers, rock racers, and trailers running on 2S – 3S LiPo power. This motor features a low cog 4-pole 8-magnet rotor design, a CNC machined aluminum housing, insulated high purity copper windings, high-quality alloy steel 3.175mm (1/8") output shaft, and precision bearings for high durability and smooth rotation. Preinstalled with 4mm gold plated bullet connectors for easy installation. Features:Excellent upgrade for 540 brushed motors with the same diameter and mounting pattern (vehicle must accept pinions with a 1/8" mm bore) Perfect for low speed, high torque applications such as competition crawlers High-quality 4-pole sintered rotor Polarity protection - magnetic encoder inside the motor guarantees consistency between three phases’ signals and always outputs precise signals indicated by rotor position. When installing simply match wire color to esc connectors 4mm gold plated bullet connectors Waterproof sensor wire with locking plug and gasket High-quality construction with precision ball bearings and hardened steel 1/8" shaft Specifications: Type: Crawler Motor Size:1/10Application: 1/10 scale crawlers, rock racers, and trailers running on 2S-3S LiPo powerConnector Type: 4mm BulletProduct Length: 2.27" (58mm)Recommended Speed Control: Spektrum Firma 60A Sensored Brushless Smart Crawler ESCReverse: YesWater-Resistant: YesForward: YesMaximum Continuous Current: 38ABushing Or Bearing: BearingNumber of Poles: 4Motor Type: Brushless - SensoredRPM/Volt (Kv): 2100KvInput Voltage: 7.4 - 11.1VOuter Diameter: 1.42" (36mm)Shaft Diameter: 0.125" (3mm)Overall Length: 2.27" (58mm) Note: Pictures are for illustrative purposes only. Vehicle models vary. We DO NOT guarantee this will fit the vehicle specified in this listing!Verify that this item is appropriate for your vehicle. Consult your manual or vehicle manufacturer.Verify vehicle fit-ment before purchase.Returns will only be accepted on items that are returned in new, factory-sealed packaging. Used, damaged (unless damaged when it arrived to you), and opened items will not receive a full refund. Any and all warranty claims will be handled through the manufacturer directly.