{"product_id":"ohlins-shims-12-42-0-20-00520-42","title":"Öhlins Shims 12\/42\/0.20 – 00520-42","description":"\u003cp\u003eShims 12\/42\/0.20, Öhlins part number 00520-42. Outer diameter sets the lever the oil works against, and thickness sets the resistance.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eOuter Diameter 42 mm\u003c\/li\u003e\n\u003cli\u003eÖhlins part number 00520-42\u003c\/li\u003e\n\u003cli\u003eThickness 0.20 mm\u003c\/li\u003e\n\u003cli\u003eOriginal Öhlins service part\u003c\/li\u003e\n\u003cli\u003eInner Diameter 12 mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhere It Sits\u003c\/h2\u003e\u003cp\u003eÖhlins publishes 12 mm, 42 mm, 0.20 mm for 00520-42 — the dimensions are the identity of the part. A coned or marked shim is finished — it no longer seals against its neighbour. A shim is a thin, ground steel washer, and the stack of them is what generates damping. Öhlins grinds shims to a flatness tolerance because the faces have to seal against each other.\u003c\/p\u003e\u003ch2\u003eOriginal Öhlins Part\u003c\/h2\u003e\u003cp\u003eÖhlins lists this part under its own number in the service catalogue so a workshop can order exactly what it needs. Öhlins is one of the few suspension makers that still supplies every position in the exploded view as a single part. The Öhlins exploded view names the number for each position; we can look it up if you do not have it. We can supply the whole position from the drawing rather than the single piece if that is easier.\u003c\/p\u003e\u003ch2\u003eGetting the Number Right\u003c\/h2\u003e\u003cp\u003e00520-42 is the Öhlins number for this position — the same one printed in the service documentation. Öhlins states inner diameter 12 mm, outer diameter 42 mm, thickness 0.20 mm for this number, and those figures are the deciding ones. Two shims of the same thickness but different diameter give completely different damping. Shim thickness is measured in hundredths of a millimetre because that is the resolution at which damping force changes.\u003c\/p\u003e\u003ch2\u003eFitting and Setup Service\u003c\/h2\u003e\u003cp\u003eIf you would rather not open the damper yourself, we can do it — we are an authorised Öhlins service centre and rebuild these units as a matter of routine.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003eBrand:\u003c\/em\u003e Öhlins\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003ePart Number:\u003c\/em\u003e 00520-42\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eCategory:\u003c\/em\u003e Shims\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eInner Diameter:\u003c\/em\u003e 12 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eOuter Diameter:\u003c\/em\u003e 42 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eThickness:\u003c\/em\u003e 0.20 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eCountry of Origin:\u003c\/em\u003e Sweden\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Öhlins","offers":[{"title":"Default Title","offer_id":53648827941130,"sku":"00520-42","price":1.67,"currency_code":"CHF","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/00520-42_216dc722-12a3-47e9-a1f8-18269f170230.png?v=1788872075","url":"https:\/\/inter-pace.com\/en-ch\/products\/ohlins-shims-12-42-0-20-00520-42","provider":"Inter-Pace","version":"1.0","type":"link"}