{"product_id":"reedy-sonic-540-sp5-spec-brushless-motor-21-5t","title":"Reedy Sonic 540‑SP5 Spec Brushless Motor (21.5T)","description":"\u003cstyle\u003e\na {\n    text-decoration: none;\n    color: #464feb;\n}\ntr th, tr td {\n    border: 1px solid #e6e6e6;\n}\ntr th {\n    background-color: #f5f5f5;\n}\n\u003c\/style\u003e\n\u003cdiv\u003e\n\u003ch2\u003eReedy Sonic 540‑SP5 Spec Brushless Motor (21.5T)\u003c\/h2\u003e\n\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eROAR‑Legal Spec Motor for 1\/10 Scale Racing\u003c\/p\u003e\n\u003cp\u003eThe Reedy Sonic 540‑SP5 21.5T Spec Brushless Motor is designed for competitive 1\/10 scale spec racing classes where smooth drivability, efficiency, and consistency are paramount. As part of Reedy’s SP5 motor platform, the 21.5T variant emphasizes controllable power delivery and reduced thermal fade, making it ideal for beginner and spec‑oriented racing categories.\u003c\/p\u003e\n\u003cp\u003eBuilt to ROAR specifications, this motor is widely used in spec touring car and spec off‑road classes.\u003c\/p\u003e\n\u003ch3\u003ePerformance and Design\u003c\/h3\u003e\n\u003cp\u003eAt the core of the Sonic SP5 is a custom in‑house stator engineered to maximize torque output while maintaining stable RPM. High‑quality copper magnet wire is wound to the maximum allowable specification and treated with heat‑transfer epoxy to efficiently dissipate heat, minimizing performance loss during long race mains.\u003c\/p\u003e\n\u003cp\u003eAn oversized collector ring paired with thick, low‑resistance solder tabs reduces electrical losses, while a balanced rotor with a high‑strength magnet ensures smooth, fade‑free power delivery. Dual precision stainless steel ball bearings support high‑RPM operation with excellent durability and efficiency.\u003c\/p\u003e\n\u003cp\u003eThe lightweight two‑piece CNC‑machined aluminum housing features optimized airflow and an aluminum end bell with adjustable timing, allowing racers to fine‑tune motor response for different track conditions.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for 1\/10 scale spec racing\u003c\/li\u003e\n\u003cli\u003eSensored brushless motor design\u003c\/li\u003e\n\u003cli\u003eCNC‑machined aluminum housing with optimized cooling\u003c\/li\u003e\n\u003cli\u003eCustom high‑power stator design\u003c\/li\u003e\n\u003cli\u003eLow‑resistance solder tabs and oversized collector ring\u003c\/li\u003e\n\u003cli\u003eBalanced rotor with high‑strength magnet\u003c\/li\u003e\n\u003cli\u003eDual precision ball bearings\u003c\/li\u003e\n\u003cli\u003eAluminum end bell with adjustable timing\u003c\/li\u003e\n\u003cli\u003eCompletely rebuildable\u003c\/li\u003e\n\u003cli\u003eCompetition proven\u003c\/li\u003e\n\u003cli\u003eBuilt to ROAR specifications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: Reedy \/ Team Associated\u003c\/li\u003e\n\u003cli\u003eProduct Type: Sensored Brushless Motor\u003c\/li\u003e\n\u003cli\u003eMotor Size: 540\u003c\/li\u003e\n\u003cli\u003eTurn Rating: 21.5T\u003c\/li\u003e\n\u003cli\u003eInput Voltage: 1–2S LiPo\u003c\/li\u003e\n\u003cli\u003eDiameter: 35.9 mm\u003c\/li\u003e\n\u003cli\u003eLength: 52.5 mm\u003c\/li\u003e\n\u003cli\u003eShaft Diameter: 3.15 mm\u003c\/li\u003e\n\u003cli\u003eWeight: 147–151 g\u003c\/li\u003e\n\u003cli\u003eManufacturer Part Number: ASC27479\u003c\/li\u003e\n\u003cli\u003eUPC: 784695274792\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1\/10 scale electric touring cars, buggies, and trucks\u003c\/li\u003e\n\u003cli\u003eSuitable for ROAR‑legal 21.5T spec racing classes\u003c\/li\u003e\n\u003cli\u003eCompatible with sensored brushless ESCs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat’s Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e(1) Reedy Sonic 540‑SP5 Spec Brushless Motor (21.5T)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"RC Hop Up Parts","offers":[{"title":"Default Title","offer_id":49012992016624,"sku":"ASC27479","price":136.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0434\/7985\/9361\/files\/asc27479.jpg?v=1773974920","url":"https:\/\/www.bigfrenchies.com\/products\/reedy-sonic-540-sp5-spec-brushless-motor-21-5t","provider":"BIG FRENCHIES","version":"1.0","type":"link"}