{"product_id":"headset-bearings","title":"Headset Bearings","description":"\u003cp\u003eHeadset bearings form an integral part of a bicycle’s steering system. They are usually found in pairs. A single bearing at the top of the head tube and another bearing at the lower end of the head tube. Headset bearings operate at very low speed and their primary function is to support axial load (ie the weight of the bike and rider) as opposed to radial load which is the turning of the handlebars.\u003c\/p\u003e\n\u003cp\u003eThey are commonly angular contact bearings with some chamfers used for locating geometric positions. Occasionally, some large deep groove ball bearings are used.\u003c\/p\u003e\n\u003cp\u003eDo not hesitate to contact us if you need assistance to determine the correct replacement.\u003c\/p\u003e\n\u003ch2 class=\"wp-block-heading\"\u003eMeasuring\u003cspan class=\"ez-toc-section-end\"\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cp\u003eHeadset bearings are notoriously problematic because they do not follow conventional ISO or JIS standards for numbering. It is always advisable to measure the physical bearing if at all possible. Use of the bearing number to size the bearing is an option,\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ebut it is not recommended\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eHeadset bearings are often imperial derived (inch) sizes. The use of a vernier caliper or digital caliper is highly recommended. A micrometer would be advantageous.\u003c\/p\u003e\n\u003cp\u003eThe figure below shows all of the measurements required to correctly identify a headset bearing.\u003c\/p\u003e\n\u003cul class=\"wp-block-list\"\u003e\n\u003cli\u003eInner Diameter\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e(this does not need to be extremely accurate\u003c\/strong\u003e)\u003c\/li\u003e\n\u003cli\u003eOuter Diameter\u003c\/li\u003e\n\u003cli\u003eHeight (width)\u003c\/li\u003e\n\u003cli\u003eInternal (Inner) Chamfer Angle in degrees\u003c\/li\u003e\n\u003cli\u003eExternal (Outer) Chamfer Angle in degrees\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Chapter 2 Cycle","offers":[{"title":"38 x 27.1 x 6.5 36\/45","offer_id":47573567930506,"sku":null,"price":45.0,"currency_code":"SGD","in_stock":true},{"title":"41 x 30.1 x 6.5 36\/45","offer_id":47573553086602,"sku":null,"price":45.0,"currency_code":"SGD","in_stock":true},{"title":"41 x 30.1 x 6.5 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