{"product_id":"spektrum-spmxsm2100-firma-3668-2400kv-brushless-motor","title":"Spektrum SPMXSM2100 Firma 3668 2400Kv Brushless Motor","description":"\u003cp\u003eThe Spektrum SPMXSM2100 Firma 3668 is a 2400Kv 4-pole sensorless brushless motor built for 1\/10 scale vehicles, including the ARRMA Kraton 4S 1\/10 and Outcast 4S 1\/10.\u003c\/p\u003e\u003cp\u003eThe 4-pole design is the key characteristic. Compared with a 2-pole motor of similar size, a 4-pole layout produces more torque at lower RPM, which suits heavy 1\/10 scale bashers that need to accelerate hard out of corners and pull through loose surfaces rather than simply reach a high top speed on smooth ground. At 2400Kv running on 2S through 4S, it covers a wide usable power range depending on the pack fitted.\u003c\/p\u003e\u003cp\u003eBeing sensorless keeps the installation simple, with no sensor wire to route, damage, or contaminate with dirt and moisture, which is a practical advantage on a vehicle that gets run hard and washed often.\u003c\/p\u003e\u003cp\u003eSpecifications are a 68mm length and 36mm diameter, a weight of 288g, a 19.25mm shaft length with 5mm shaft diameter, 45mm wire leads, and 4mm bullet connectors for the ESC. The 5mm shaft accepts standard 5mm bore pinion gears.\u003c\/p\u003e\u003cp\u003eThis works both as a direct replacement where it was fitted as original equipment and as a power upgrade for a 1\/10 vehicle moving up in capability. One brushless motor is included.\u003c\/p\u003e","brand":"ARRMA","offers":[{"title":"Default Title","offer_id":55773752787266,"sku":"SPMXSM2100","price":69.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/5063\/8402\/files\/SPMXSM2100_A2_VCX7WRWZ.jpg?v=1785968993","url":"https:\/\/www.powerhobby.com\/products\/spektrum-spmxsm2100-firma-3668-2400kv-brushless-motor","provider":"PowerHobby","version":"1.0","type":"link"}