{"product_id":"varstrom-48v-500w-125evhrc","title":"AIKEMA 48V 500W 125EVH.RC500 Rear Hub Complete Conversion Kit","description":"\u003ch2\u003eHelical Gear – The Technical Upgrade\u003c\/h2\u003e\n\u003cp\u003eThe gradual adoption of Helical Gear hub motors isn’t merely a simple “noise reduction choice”—it’s the inevitable technological destiny for the e-bike industry as it evolves from “wild growth” to “standardization and premium quality.” It upgrades the \u003cspan style=\"color: rgb(146, 198, 71);\"\u003e\u003cstrong\u003eregulatory compliance\u003c\/strong\u003e\u003c\/span\u003e, \u003cstrong\u003e\u003cspan style=\"color: rgb(146, 198, 71);\"\u003esmoother power\u003c\/span\u003e \u003c\/strong\u003eand \u003cspan style=\"color: rgb(146, 198, 71);\"\u003e\u003cstrong\u003eriding experience\u003c\/strong\u003e\u003c\/span\u003e. A modest price premium has already been accepted by consumers.\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0588\/1125\/2889\/files\/HelicalGearVARSTROMAIKEMARearHubKitsvsSpurGears.jpg?v=1773653724\" alt=\"Helical Gear VARSTROM AIKEMA Rear Hub Kits vs Spur Gears\"\u003e\u003c\/p\u003e\n\u003ch2\u003eAdvantages of Helical Gear\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eRegulatory Compliance: Reduces noise to meet EU, UK and most US state laws\u003c\/li\u003e\n\u003cli\u003ePerformance Upgrade: Multiple teeth engage simultaneously, increasing load capacity—ideal for high-power motors\u003c\/li\u003e\n\u003cli\u003eExtended Lifespan: Lower contact stress extends fatigue life by 60%+\u003c\/li\u003e\n\u003cli\u003eEnhanced Smoothness: Reduces vibration amplitude, significantly improving ride quality\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e125XVH.RC500 and Controller\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0588\/1125\/2889\/files\/MotorandControllerSpecsforVARSTROM_AIKEMA48V500W125EVH.RC500RearHubCompleteConversionKit.jpg?v=1773654548\" alt=\"Motor and Controller Specs for VARSTROM \u0026amp; AIKEMA 48V 500W 125EVH.RC500 Rear Hub Complete Conversion Kit\"\u003e\n\u003c\/h2\u003e\n\u003ch3\u003eRear Hub Motor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePosition: Rear Hub\u003c\/li\u003e\n\u003cli\u003eOLD: \u003cspan style=\"color: rgb(146, 198, 71);\"\u003e\u003cstrong\u003e142 (±1)mm\u003c\/strong\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eNorminal Voltage: 48V\u003c\/li\u003e\n\u003cli\u003eRated Power: 500W\u003c\/li\u003e\n\u003cli\u003eMax Torque: 65N.m\u003c\/li\u003e\n\u003cli\u003eMax Speed: \u003cspan style=\"color: rgb(146, 198, 71);\"\u003e\u003cstrong\u003e44km\/h\u003c\/strong\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eη: \u0026gt;75%\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e48V 500W Hub Motor Controller\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMax Current: 18A\u003c\/li\u003e\n\u003cli\u003eRated Current: 9A\u003c\/li\u003e\n\u003cli\u003eRated Voltage: 48V\u003c\/li\u003e\n\u003cli\u003eLow Voltage: 39 (±1)V\u003c\/li\u003e\n\u003cli\u003eOver Voltage: 62 (±1)V\u003c\/li\u003e\n\u003cli\u003eProgramming Cable: N\/A\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003e\u003cstrong\u003eWarm Tip: VARSTROM AIKEMA controller doesn't support reprogramming.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eInstallation Dimensions Confirmation\u003c\/h2\u003e\n\u003cp\u003eAt VARSTROM, we believe the first priority after determining your motor specifications is to clearly understand its installation dimensions. A clear grasp of the wheel installation logic eliminates the frustration of having to exchange products after they arrive. That’s why we’ve created an installation exploded-view diagram—to help you better comprehend the motor’s fitting requirements.\u003c\/p\u003e\n\u003cp\u003ePlease refer to this diagram to understand the \u003cspan style=\"color: rgb(146, 198, 71);\"\u003e\u003cstrong\u003eO.L.D (Over-Locknut Dimension) calculation range for this hub motor (note: O.L.D includes the anti-rotation washer)\u003c\/strong\u003e\u003c\/span\u003e, then measure the spacing on your frame accordingly.\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0588\/1125\/2889\/files\/InstallationMeasurementforVARSTROM_AIKEMA48V500W125EVH.RC500RearHubCompleteConversionKit.jpg?v=1773654548\" alt=\"Installation Measurement for VARSTROM \u0026amp; AIKEMA 48V 500W 125EVH.RC500 Rear Hub Complete Conversion Kit\"\u003e\u003c\/p\u003e\n\u003ch3\u003eInstallation Recommendation\u003c\/h3\u003e\n\u003cp\u003eIf the motor’s installation dimension (O.L.D) is slightly larger than your frame dropout, you can install the anti-rotation washer on the outside of the dropout. However, if the O.L.D is significantly larger than the dropout, VARSTROM recommends considering an alternative motor option.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFriendly Tip: If your frame's rear dropout spacing is less than 142mm (e.g., 135mm), consider installing the torque arm on the outside of the rear dropout.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNote: Shims are used to create or fill installation space; O.L.D measurements do not account for shim thickness.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eDisc\/V Brake Rim Options\u003c\/h2\u003e\n\u003cp\u003eVARSTROM offers both disc brake rims and V-brake rims for this motor. If your bicycle uses a V-brake system, you must select the V-brake rim version.\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0588\/1125\/2889\/files\/RimstyleforVARSTROM_AIKEMA_48V500W125XVH.RCRearHubCompleteConversionKit.jpg?v=1773644070\" alt=\"Rim style for VARSTROM (AIKEMA) 48V 500W 125XVH.RC Rear Hub Complete Conversion Kit\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eFriendly Tip: If disc brake version wheels are temporarily out of stock, V-brake rim versions will also support Disc Brake System. So, VARSTROM will ship V-brake version wheels as a substitute.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eSpecs for VARSTROM Disc\/V Brake Wheel\u003c\/h2\u003e\n\u003ch3\u003eDisc Brake Wheels\u003c\/h3\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0588\/1125\/2889\/files\/DiscBrakeRimSizeforVARSTROM_AIKEMA_RearHubWheels.jpg?v=1773640628\" alt=\"Disc Brake Rim Size for VARSTROM (AIKEMA) Rear Hub Wheels\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003ch3\u003eV-Brake Wheels\u003c\/h3\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0588\/1125\/2889\/files\/V-BrakeRimSizeforVARSTROM_AIKEMA_RearHubWheels.jpg?v=1773640628\" alt=\"V-Brake Rim Size for VARSTROM (AIKEMA) Rear Hub Wheels\"\u003e\u003c\/p\u003e\n\u003ch2\u003eVarstrom eBrake Options\u003c\/h2\u003e\n\u003cp\u003eTo better matching customer's existing brake system, VARSTROM provides power-cutoff mechanical brake levers and sensors. This device automatically stops the motor when braking which is a critical safety feature for e-bikes.\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg style=\"float: none;\" alt=\"Varstrom eBrake Options_Varstrom\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0588\/1125\/2889\/files\/VarstromeBrakeOptions_Varstrom.jpg?v=1770880927\"\u003e\u003c\/div\u003e\n\u003ch2\u003eDisplay Options\u003c\/h2\u003e\n\u003cp\u003eVARSTROM AIKEMA hub kits features can-bus display, Varstrom offered 3 displays for the hub kit system.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0588\/1125\/2889\/files\/DisplayOptionsforVARSTROM_AIKEMA_RearHubCompleteConversionKit.jpg?v=1773640628\" alt=\"Display Options for VARSTROM (AIKEMA) Rear Hub Complete Conversion Kit\"\u003e\u003c\/p\u003e\n\u003ch2\u003eBattery Options\u003c\/h2\u003e\n\u003cp\u003eAll VARSTROM 48V batteries are compatible with this motor. We recommend exploring our \u003cspan style=\"color: rgb(146, 198, 71);\"\u003e\u003ca rel=\"noopener\" title=\"Varstrom 48V Battery for E-Bike Conversion Kits.\" href=\"https:\/\/varstrom.com\/products\/48v-ebike-battery\" style=\"color: rgb(146, 198, 71);\" target=\"_blank\"\u003e\u003cstrong\u003e48V Battery with Charger for E-Bike Conversion\u003c\/strong\u003e\u003c\/a\u003e\u003c\/span\u003e collection to find the right power solution for your build.\u003c\/p\u003e\n\u003cp\u003eYou may also use your own battery, provided it meets these requirements\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVoltage: \u003cstrong\u003e48V\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBMS Max Continuous Current: \u003cstrong\u003e≥30A\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWiring Schematic\u003c\/h2\u003e\n\u003cp\u003eIf you're not familiar with the wiring, during installation, you can save this \u003cspan style=\"color: rgb(146, 198, 71);\"\u003e\u003ca style=\"color: rgb(146, 198, 71);\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0588\/1125\/2889\/files\/ElectricalConnectionDiagramforMotorandControllerSpecsforVARSTROM_AIKEMA48V500W125EVH.RC500RearHubCompleteConversionKit.jpg?v=1773654548\" title=\"System Wiring Guide for VARSTROM \u0026amp; AIKEMA 48V 500W 125EVH.RC500 Rear Hub Complete Conversion Kit\" rel=\"noopener\" target=\"_blank\"\u003e\u003cstrong\u003e125EVH.RC500 Rear Hub Wiring Diagram\u003c\/strong\u003e\u003c\/a\u003e\u003c\/span\u003e for reference.\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0588\/1125\/2889\/files\/ElectricalConnectionDiagramforMotorandControllerSpecsforVARSTROM_AIKEMA48V500W125EVH.RC500RearHubCompleteConversionKit.jpg?v=1773654548\" alt=\"VARSTROM \u0026amp; AIKEMA 48V 500W 125EVH.RC500 Rear Hub Complete Conversion Kit\"\u003e\u003c\/p\u003e\n\u003ch2\u003ePackage Included\u003c\/h2\u003e\n\u003ch3\u003eFor the Kits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHub Motor Wheel\u003c\/li\u003e\n\u003cli\u003eHeadlight\u003c\/li\u003e\n\u003cli\u003eController\u003c\/li\u003e\n\u003cli\u003eController Box\u003c\/li\u003e\n\u003cli\u003eBrake Levers or Brake Sensors\u003c\/li\u003e\n\u003cli\u003eThumb Throttle (Accelerator)\u003c\/li\u003e\n\u003cli\u003eLeft Sight PAS Sensor (Smaller Hole)\u003c\/li\u003e\n\u003cli\u003e1T4 Cable\u003c\/li\u003e\n\u003cli\u003eInstallation Tools\u003c\/li\u003e\n\u003cli\u003e250W Labels\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFor Customize Options\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDisplay\u003c\/li\u003e\n\u003cli\u003eBattery\u003c\/li\u003e\n\u003cli\u003eTail Light\u003c\/li\u003e\n\u003cli\u003eRight Sight PAS Sensor (Larger Hole)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0588\/1125\/2889\/files\/PackageforVARSTROM_AIKEMA_48V500W125XVH.RCRearHubCompleteConversionKit.jpg?v=1773640628\" alt=\"Package for VARSTROM (AIKEMA) 48V 500W 125XVH.RC Rear Hub Complete Conversion Kit\"\u003e\u003c\/p\u003e\n\u003ch2\u003eDelivery Time and Warranty\u003c\/h2\u003e\n\u003cp\u003e90% of Varstrom's products are shipped from local warehouses and can be delivered within \u003cspan style=\"color: rgb(146, 198, 71);\"\u003e3 to 8 working days\u003c\/span\u003e. The delivery point in the EU region is in Poland, and the delivery time is \u003cspan style=\"color: rgb(146, 198, 71);\"\u003e6 to 8 working days\u003c\/span\u003e. Out - of - stock products may be shipped from China. Customers can contact Varstrom via \u003cspan style=\"color: rgb(146, 198, 71);\"\u003eWhatsApp (+86 15989932938)\u003c\/span\u003e or \u003cspan style=\"color: rgb(146, 198, 71);\"\u003e\u003ca style=\"color: rgb(146, 198, 71);\" href=\"mailto:service@varstrom.com\" rel=\"noopener\" target=\"_blank\"\u003eE-mail\u003c\/a\u003e\u003c\/span\u003e to inquire about the logistics situation.\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0588\/1125\/2889\/files\/VarstromShippingTimeExplanationDetail.jpg?v=1749692044\" alt=\"Varstrom Delivery Policy and Warranty Policy\" style=\"float: none;\"\u003e\u003c\/div\u003e","brand":"VARSTROM","offers":[{"title":"European Union \/ Disc Brake \/ 20-inch","offer_id":46396671131801,"sku":"HH043089","price":328.21,"currency_code":"AUD","in_stock":true},{"title":"European Union \/ Disc Brake \/ 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