{"product_id":"cuscinetto-sigillato-fsa-1-1-8-th-870e-acb-45x45-single-seal-mr121-nero","title":"Fsa 1-1\/8'' TH-873E ACB 36x45° single seal MR122 sealed bearing - Black","description":"\u003cdiv class=\"data item content\" id=\"description\" role=\"tabpanel\"\u003e\n\u003cdiv class=\"product attribute description\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003ch3\u003eSealed 1-1\/8'' TH-870E ACB bearing: reliable performance for the headset\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eFSA sealed bearing\u003c\/strong\u003e model TH-870E ACB is an advanced technical solution for those seeking reliability and durability in their headset system. Designed with \u003cstrong\u003edual sealing\u003c\/strong\u003e to protect internal elements from dirt and moisture, this component ensures smooth, precise rotation even under demanding use. The \u003cstrong\u003eCr-Mo balls\u003c\/strong\u003e deliver superior mechanical strength, while the \u003cstrong\u003e45x45°\u003c\/strong\u003e architecture enables optimal load distribution during pedaling and cornering.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical specifications and headset compatibility\u003c\/h3\u003e\n\n\u003cp\u003eThe bearing stands out for its compact, standardized dimensions: \u003cstrong\u003eID 31mm\u003c\/strong\u003e inner diameter and \u003cstrong\u003eOD 41.8mm\u003c\/strong\u003e outer diameter, with an 8mm height that makes it suitable for \u003cstrong\u003e1-1\/8 inch steerer tubes\u003c\/strong\u003e. The symmetric 45° contact angles ensure a balance between axial and radial stiffness, a crucial aspect for steering stability. The MR121 specification indicates the \u003cstrong\u003esingle seal\u003c\/strong\u003e configuration, which reduces friction while maintaining effective protection against external elements.\u003c\/p\u003e\n\n\u003ch3\u003eMaterials and durability in extreme conditions\u003c\/h3\u003e\n\n\u003cp\u003eThe composition of the 26 \u003cstrong\u003eCr-Mo balls measuring 1.8 inches\u003c\/strong\u003e provides greater fatigue resistance than standard steel bearings, allowing repeated load cycles without premature wear. The integrated \u003cstrong\u003esealing treatment\u003c\/strong\u003e reduces the need for frequent maintenance, extending the interval between cleaning and lubrication cycles. This bearing is ideal for cyclists tackling varied terrain and requiring high-performance components with long-term reliability.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical features\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eInner diameter (ID): \u003cstrong\u003e31mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eOuter diameter (OD): \u003cstrong\u003e41.8mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eHeight (H): 8mm\u003c\/li\u003e\n\u003cli\u003eContact angles: 45° inner \/ 45° outer\u003c\/li\u003e\n\u003cli\u003eBall material: \u003cstrong\u003eCr-Mo\u003c\/strong\u003e (number of balls: 26)\u003c\/li\u003e\n\u003cli\u003eBall diameter: \u003cstrong\u003e1.8 inches\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSeal type: \u003cstrong\u003eSingle seal\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eSpecification code: MR121\u003c\/li\u003e\n\u003cli\u003eCompatibility: \u003cstrong\u003e1-1\/8 inch\u003c\/strong\u003e (tapered) headsets\u003c\/li\u003e\n\u003cli\u003eBrand: FSA model TH-870E ACB\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Fsa","offers":[{"title":"One size","offer_id":54681920340314,"sku":"160-1647","price":9.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0532\/7139\/6534\/files\/137831-868945434-602b.webp?v=1788341088","url":"https:\/\/www.all4cycling.com\/en\/products\/cuscinetto-sigillato-fsa-1-1-8-th-870e-acb-45x45-single-seal-mr121-nero","provider":"All4cycling ","version":"1.0","type":"link"}