{"product_id":"cuscinetto-sigillato-fsa-1-1-8-th-873e-acb-36x45-single-seal-mr122-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-873E ACB bearing: performance and reliability for the headset\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eFSA TH-873E ACB sealed bearing\u003c\/strong\u003e is a technical benchmark solution for those seeking high-performance headset components. Designed to \u003cstrong\u003e36x45°\u003c\/strong\u003e standards, this bearing offers an optimized geometry to ensure smooth steering action and directional stability. Technical specifications include an \u003cstrong\u003einternal diameter of 30.2mm\u003c\/strong\u003e and an external diameter of 41mm, with a reduced height of 6.5mm for compact integration in traditional headsets. The \u003cstrong\u003esingle seal MR122\u003c\/strong\u003e effectively protects the interior from dirt, moisture, and contaminants, extending the component’s durability under varying riding conditions.\u003c\/p\u003e\n\n\u003ch3\u003eConstruction specifications and bearing materials\u003c\/h3\u003e\n\n\u003cp\u003eThe construction of the \u003cstrong\u003eACB bearing\u003c\/strong\u003e uses \u003cstrong\u003eCr-Mo (Chromium-Molybdenum)\u003c\/strong\u003e steel balls with a diameter of 1.8 inches, with 23 elements to ensure optimal load distribution. This material is selected for its resistance to wear and corrosion, essential characteristics in components exposed to the outdoor environment. The \u003cstrong\u003e36° contact angle\u003c\/strong\u003e at the entry and 45° at the exit allows balanced handling of radial and axial loads, typical of tapered bearings used in \u003cstrong\u003e1-1\/8 inch\u003c\/strong\u003e headsets. The integrated sealing maintains consistent performance over time, reducing the need for frequent maintenance.\u003c\/p\u003e\n\n\u003ch3\u003eApplications and compatibility with standard headsets\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eTH-873E\u003c\/strong\u003e complies with technical specifications for \u003cstrong\u003e1-1\/8 inch\u003c\/strong\u003e headsets, the most common standard on road bikes, gravel and modern mountain bikes. The \u003cstrong\u003esingle seal\u003c\/strong\u003e design offers a compromise between protection and reduced friction compared with fully sealed solutions, maintaining smooth operation even after long periods of use. Its compact dimensions (ID 30.2mm, OD 41mm, H 6.5mm) allow direct installation in standard headset cartridges, simplifying replacement operations and routine maintenance at specialist workshops.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical features\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eInternal diameter (ID): \u003cstrong\u003e30.2mm\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eExternal diameter (OD): 41mm.\u003c\/li\u003e\n\u003cli\u003eHeight (H): 6.5mm.\u003c\/li\u003e\n\u003cli\u003eContact angles: \u003cstrong\u003e36° inner \/ 45° outer\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eBall type: \u003cstrong\u003eCr-Mo steel\u003c\/strong\u003e, 1.8-inch diameter, quantity 23.\u003c\/li\u003e\n\u003cli\u003eSealing: \u003cstrong\u003eSingle seal MR122\u003c\/strong\u003e for protection against contaminants.\u003c\/li\u003e\n\u003cli\u003eCompatible standard: \u003cstrong\u003e1-1\/8 inch headset\u003c\/strong\u003e (ZS44).\u003c\/li\u003e\n\u003cli\u003eManufacturer: FSA.\u003c\/li\u003e\n\u003cli\u003eModel: TH-873E ACB.\u003c\/li\u003e\n\u003cli\u003eMain application: Bicycle headset.\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":54681675268442,"sku":"160-0014000000","price":9.9,"currency_code":"EUR","in_stock":false}],"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-873e-acb-36x45-single-seal-mr122-nero","provider":"All4cycling ","version":"1.0","type":"link"}