{"product_id":"front-hub-bearing-csc-go-qmb139-scooters-0600-4003","title":"Front Hub Bearing: 139QMB Scooters","description":"\u003ch2\u003eSmooth Rolling: High-Precision Front Hub Bearing\u003c\/h2\u003e\u003cp\u003eRestore the handling and safety of your scooter with this \u003cstrong\u003eHigh-Precision Front Hub Bearing\u003c\/strong\u003e. Specifically designed for the 10mm axle systems found on Chicago Scooter Company models and 139QMB (GY50) Chinese scooters, this bearing ensures low-friction rotation and a stable front-end feel. Whether you are experiencing wheel wobble, \"grinding\" noises, or performing a routine front-wheel service, this OEM-spec bearing is the standard for reliable urban commuting.\u003c\/p\u003e\u003ch3\u003eTechnical Performance Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM-Spec Geometry:\u003c\/strong\u003e Features exact 30mm OD \/ 10mm ID dimensions for a press-fit installation that matches the factory tolerances of your front hub.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Shielded Design:\u003c\/strong\u003e Equipped with protective shields to keep road grime and moisture out of the internal raceways, significantly extending the life of the bearing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Speed Rated:\u003c\/strong\u003e Engineered to handle the RPMs and lateral loads of 10-inch and 12-inch scooter wheels at full city speeds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-Friction Performance:\u003c\/strong\u003e Reduces rolling resistance to improve fuel efficiency and provide a smoother, more predictable steering response.\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003ch3\u003eComprehensive Fitment Guide\u003c\/h3\u003e\u003cp\u003eThis bearing is a direct replacement for the front wheel assembly of the following \u003cstrong\u003e50cc 4-stroke\u003c\/strong\u003e scooters:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eBrand \/ Manufacturer\u003c\/th\u003e\n\u003cth style=\"text-align: left;\"\u003eCompatible Models\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChicago Scooter Co.\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGo, Go. MAX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChinese GY6 50cc\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e139QMB \/ QMB139 \/ GY50 Engine Platforms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePopular Brands\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTaoTao, Wolf, Ice Bear, Bintelli (50cc Models)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003chr\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOuter Diameter:\u003c\/strong\u003e 30 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInner Diameter:\u003c\/strong\u003e 10 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 9 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBearing Type:\u003c\/strong\u003e 6000 Series (Verify size on old bearing)\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003cblockquote\u003e\n\u003cstrong\u003eMechanic's Note:\u003c\/strong\u003e Wheel bearings should always be replaced in pairs to ensure even wear and balanced handling. When installing, never strike the inner race of the bearing; always use a \u003cstrong\u003eBearing Driver Tool\u003c\/strong\u003e or a socket that matches the diameter of the outer race to press the bearing into the hub. For the best results, clean the hub bore thoroughly and apply a light film of \u003cstrong\u003eHigh-Temp Grease\u003c\/strong\u003e before installation.\u003c\/blockquote\u003e\u003cp style=\"font-size: 0.85em; color: #666;\"\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e 0600-4003 \u003cbr\u003e\u003cstrong\u003eMPN:\u003c\/strong\u003e 3500136\u003c\/p\u003e\u003cp\u003eFront Hub bearing for CSC Go or 139QMB Chinese Scooter\u003c\/p\u003e","brand":"Chicago Scooter Company","offers":[{"title":"Default Title","offer_id":46759730643224,"sku":"0600-4003","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/1728\/1816\/products\/0600-4003_ca7cffb3-aed9-4d28-b67a-3bd53feb815d.jpg?v=1695304138","url":"https:\/\/www.scooterworks.com\/products\/front-hub-bearing-csc-go-qmb139-scooters-0600-4003","provider":"Scooterworks USA, LLC","version":"1.0","type":"link"}