{"product_id":"otk-rear-hub-d50-77mm-magnesium","title":"OTK Rear Hub D50 x 77mm Magnesium","description":"\u003cp\u003eThe \u003cstrong\u003eOTK Rear Hub D50 x 77mm Magnesium\u003c\/strong\u003e is a genuine OTK magnesium rear wheel hub designed for compatible OTK-based kart chassis using a 50mm rear axle. This shorter 77mm magnesium hub is used to mount the rear wheel to the axle and is a popular choice for chassis setup, race preparation and replacement use. Sold individually as a genuine OTK spare part.\u003c\/p\u003e\n\u003cp\u003eRear hub length and material are both relevant factors in kart chassis setup. The length of the rear hub affects how rigidly the rear wheel is positioned relative to the axle, which in turn influences how the rear of the kart behaves on track. A shorter rear hub such as this 77mm option is often selected when track conditions offer higher grip levels, or when the driver wants to free up the rear of the kart and improve rotation through corners. Magnesium hubs are widely used in karting for their combination of strength and low weight, making them a practical choice for race setup, fine-tuning and replacement across a range of engine classes and track conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine OTK spare part\u003c\/li\u003e\n\u003cli\u003eOTK part number: 0046.E0\u003c\/li\u003e\n\u003cli\u003eMagnesium construction for strength and low weight\u003c\/li\u003e\n\u003cli\u003e50mm diameter — designed for 50mm rear axles\u003c\/li\u003e\n\u003cli\u003e77mm length — short rear hub option\u003c\/li\u003e\n\u003cli\u003eRear wheel hub for mounting the rear wheel to the axle\u003c\/li\u003e\n\u003cli\u003eSuitable for compatible OTK-based chassis using a 50mm rear axle\u003c\/li\u003e\n\u003cli\u003eSold individually\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eProduct details:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: OTK\u003c\/li\u003e\n\u003cli\u003ePart number: 0046.E0\u003c\/li\u003e\n\u003cli\u003eType: Rear wheel hub\u003c\/li\u003e\n\u003cli\u003eMaterial: Magnesium\u003c\/li\u003e\n\u003cli\u003eAxle diameter: 50mm\u003c\/li\u003e\n\u003cli\u003eHub length: 77mm\u003c\/li\u003e\n\u003cli\u003eDesign: Short rear hub\u003c\/li\u003e\n\u003cli\u003eQuantity: Sold individually\u003c\/li\u003e\n\u003cli\u003eWheel nuts, wheel, tyre, axle, axle key and fixings are not included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSetup note:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eRear hub length is a tuning variable used by mechanics and drivers to adjust how the rear of the kart behaves. A shorter hub such as this 77mm option reduces the lateral stiffness at the rear wheel, which can help free up the rear of the kart and improve rotation, particularly on higher grip tracks or in conditions where the rear is overworking. Hub length selection should always be considered alongside other setup variables including axle stiffness, tyre choice and track conditions. If you are unsure which hub length is correct for your setup, consult your mechanic or chassis documentation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment note:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis rear hub is designed for compatible OTK-based kart chassis using a 50mm rear axle. Before ordering, customers must verify the following:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eChassis model and manufacturer\u003c\/li\u003e\n\u003cli\u003eRear axle diameter (50mm required)\u003c\/li\u003e\n\u003cli\u003eRequired hub length for your setup\u003c\/li\u003e\n\u003cli\u003eAxle keyway specification\u003c\/li\u003e\n\u003cli\u003eWheel fitment and bore compatibility\u003c\/li\u003e\n\u003cli\u003eClass regulations and technical requirements\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis part is not suitable for every kart. It is intended for compatible OTK-based chassis where part number 0046.E0 and the 50mm x 77mm specification are confirmed correct.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIdeal for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTony Kart chassis using a 50mm rear axle\u003c\/li\u003e\n\u003cli\u003eKosmic chassis using a 50mm rear axle\u003c\/li\u003e\n\u003cli\u003eExprit chassis using a 50mm rear axle\u003c\/li\u003e\n\u003cli\u003eLN Kart chassis using a 50mm rear axle\u003c\/li\u003e\n\u003cli\u003eRedspeed chassis using a 50mm rear axle\u003c\/li\u003e\n\u003cli\u003eEOS chassis using a 50mm rear axle\u003c\/li\u003e\n\u003cli\u003eGillard chassis using a 50mm rear axle\u003c\/li\u003e\n\u003cli\u003eCS55 chassis using a 50mm rear axle\u003c\/li\u003e\n\u003cli\u003eDrivers and mechanics looking to tune rear grip and rotation using hub length\u003c\/li\u003e\n\u003cli\u003eRace preparation, testing and replacement use on compatible OTK-based chassis\u003c\/li\u003e\n\u003cli\u003eAny compatible OTK-based chassis where part number 0046.E0 and the 50mm x 77mm specification are confirmed correct\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf you are unsure whether this hub is correct for your chassis or setup, check your existing rear hub part number or consult your chassis documentation before ordering.\u003c\/p\u003e","brand":"OTK","offers":[{"title":"Default Title","offer_id":58439622525253,"sku":"0046.E0","price":89.47,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0946\/2785\/6709\/files\/otk-rear-hub-d50-77mm-magnesium-0046-e0.png?v=1783005928","url":"https:\/\/thekartstore.com\/products\/otk-rear-hub-d50-77mm-magnesium","provider":"IC Kartstore","version":"1.0","type":"link"}