{"product_id":"otk-genuine-50mm-rear-axle","title":"OTK Genuine 50mm Rear Axle","description":"\u003cp\u003eThe \u003cstrong\u003eOTK Genuine 50mm rear axle\u003c\/strong\u003e is a replacement and setup axle for compatible OTK-based kart chassis. Available in different lengths and hardness options, it is ideal for kart setup, race preparation and replacing worn or damaged axles.\u003c\/p\u003e\n\n\u003cp\u003eSourced directly from OTK, this is a genuine manufacturer component designed to fit OTK-based chassis to the correct specification. Whether you are replacing a worn or damaged axle, preparing for a race weekend or fine-tuning your kart's handling balance, this axle is a reliable, competition-ready choice for racers, mechanics and teams running compatible OTK-based machinery.\u003c\/p\u003e\n\n\u003cp\u003eRear axle selection is one of the most influential chassis setup decisions in karting. The stiffness of the axle directly affects how the rear of the kart behaves through corners, under braking and on corner exit. A harder axle tends to reduce rear flex, which can improve stability and suit higher-grip circuits, heavier drivers or conditions where the kart is already generating strong rear traction. Softer options allow more chassis movement, which can help the kart work in lower-grip conditions or on circuits where rear-end rotation is needed. Choosing the correct axle hardness for your conditions, class and driving style is an important part of competitive kart setup.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine OTK rear axle — not an aftermarket or pattern part\u003c\/li\u003e\n\u003cli\u003e50mm diameter, compatible with OTK-based chassis using a 50mm rear axle specification\u003c\/li\u003e\n\u003cli\u003eAvailable in 1000mm and 1030mm lengths depending on variant\u003c\/li\u003e\n\u003cli\u003eAvailable in multiple hardness options depending on variant\u003c\/li\u003e\n\u003cli\u003eSuitable for Tony Kart, Kosmic, Exprit, LN Kart, EOS, Red Speed, Carlos Sainz 55 and Gillard chassis\u003c\/li\u003e\n\u003cli\u003eSold individually\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eVariant guide:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e Available in 1000mm or 1030mm — check your chassis specification before ordering\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardness:\u003c\/strong\u003e Options may include Medium, Hard, Extra Hard and Extra Extra Hard — availability depends on current stock\u003c\/li\u003e\n\u003cli\u003eOnly variants shown as available in the product listing are currently in stock\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSetup note:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAxle hardness has a direct effect on kart handling. A harder axle generally reduces rear flex and suits high-grip conditions, heavier drivers or circuits where stability is the priority. A softer axle allows more chassis movement and can help the kart generate rear grip in lower-traction conditions. Always select your axle based on circuit conditions, class requirements, driver weight and setup advice from your team or mechanic.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eProduct details:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: OTK (genuine part)\u003c\/li\u003e\n\u003cli\u003eDiameter: 50mm\u003c\/li\u003e\n\u003cli\u003eAvailable lengths: 1000mm \/ 1030mm\u003c\/li\u003e\n\u003cli\u003eHardness options: Medium \/ Hard \/ Extra Hard \/ Extra Extra Hard (subject to availability)\u003c\/li\u003e\n\u003cli\u003eSold individually\u003c\/li\u003e\n\u003cli\u003eAxle keys, bearings, hubs and other fittings are not included\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCompatibility note:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis axle is designed for OTK-based kart chassis using a 50mm rear axle. It is commonly used on the following chassis:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTony Kart\u003c\/li\u003e\n\u003cli\u003eKosmic\u003c\/li\u003e\n\u003cli\u003eExprit\u003c\/li\u003e\n\u003cli\u003eLN Kart\u003c\/li\u003e\n\u003cli\u003eEOS\u003c\/li\u003e\n\u003cli\u003eRed Speed\u003c\/li\u003e\n\u003cli\u003eCarlos Sainz 55\u003c\/li\u003e\n\u003cli\u003eGillard\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBefore ordering, please confirm your chassis model, axle diameter, axle length, brake hub, sprocket carrier, wheel hub and bearing carrier compatibility. This axle is not a universal fit and is intended only for compatible OTK-based chassis using the 50mm rear axle specification.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIdeal for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReplacing a worn or damaged rear axle on an OTK-based chassis\u003c\/li\u003e\n\u003cli\u003eKart chassis setup and rear-end grip adjustment\u003c\/li\u003e\n\u003cli\u003eRace preparation and testing\u003c\/li\u003e\n\u003cli\u003eKart mechanics and race teams managing multiple chassis\u003c\/li\u003e\n\u003cli\u003eOwner-drivers maintaining or setting up their own kart\u003c\/li\u003e\n\u003cli\u003eCompetitive karting across a range of classes and circuits\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eA genuine OTK component, built to the correct specification for competitive karting on compatible OTK-based chassis.\u003c\/p\u003e","brand":"OTK","offers":[{"title":"1000 \/ Super Soft (U)","offer_id":58432088736069,"sku":"0054G0100U","price":136.84,"currency_code":"GBP","in_stock":true},{"title":"1000 \/ Soft (Q)","offer_id":58432088768837,"sku":"0054G0100Q","price":136.84,"currency_code":"GBP","in_stock":true},{"title":"1000 \/ Medium (N)","offer_id":58432088801605,"sku":"0054G0100N","price":136.84,"currency_code":"GBP","in_stock":true},{"title":"1000 \/ Medium Hard (A)","offer_id":58432088834373,"sku":"0054G0100A","price":136.84,"currency_code":"GBP","in_stock":false},{"title":"1000 \/ Hard (H)","offer_id":58432088867141,"sku":"0054G0100H","price":136.84,"currency_code":"GBP","in_stock":true},{"title":"1000 \/ Extra Hard (HH)","offer_id":58432088899909,"sku":"0054G0100HH","price":136.84,"currency_code":"GBP","in_stock":true},{"title":"1000 \/ Extra Extra Hard (HD)","offer_id":58432088932677,"sku":"0054G0100HD","price":136.84,"currency_code":"GBP","in_stock":false},{"title":"1030 \/ Super Soft (U)","offer_id":58432088965445,"sku":"0054G0U","price":136.84,"currency_code":"GBP","in_stock":true},{"title":"1030 \/ Soft (Q)","offer_id":58432088998213,"sku":"0054G0Q","price":136.84,"currency_code":"GBP","in_stock":true},{"title":"1030 \/ Medium (N)","offer_id":58432089030981,"sku":"0054G0N","price":136.84,"currency_code":"GBP","in_stock":true},{"title":"1030 \/ Medium Hard (A)","offer_id":58432089063749,"sku":"0054G0A","price":136.84,"currency_code":"GBP","in_stock":true},{"title":"1030 \/ Hard (H)","offer_id":58432089096517,"sku":"0054G0H","price":136.84,"currency_code":"GBP","in_stock":true},{"title":"1030 \/ Extra Hard (HH)","offer_id":58432089129285,"sku":"0054G0HH","price":136.84,"currency_code":"GBP","in_stock":true},{"title":"1030 \/ Extra Extra Hard (HD)","offer_id":58432089162053,"sku":"0054G0HD","price":136.84,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0946\/2785\/6709\/files\/otk-genuine-50mm-rear-axle-karting.webp?v=1782996569","url":"https:\/\/thekartstore.com\/products\/otk-genuine-50mm-rear-axle","provider":"IC Kartstore","version":"1.0","type":"link"}