{"product_id":"ohlins-o-ring-32-1x1-6-nbr-90-00638-73","title":"Öhlins O-ring 32.1x1.6 NBR 90 – 00638-73","description":"\u003cp\u003eO-ring 32.1x1.6 NBR 90, Öhlins part number 00638-73. Nitrile, Viton and PTFE behave differently with temperature, and Öhlins picks per position.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMaterial NBR 90\u003c\/li\u003e\n\u003cli\u003eInner Diameter 32.1 mm\u003c\/li\u003e\n\u003cli\u003eÖhlins part number 00638-73\u003c\/li\u003e\n\u003cli\u003eCross Section 1.6 mm\u003c\/li\u003e\n\u003cli\u003eOriginal Öhlins service part\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFunction\u003c\/h2\u003e\u003cp\u003eAt 32.1 mm, 1.6 mm, NBR 90 it fits one position only; the next size up carries a different number. A seal that has taken a set no longer springs back and starts to weep. Öhlins uses seals with a spring-loaded lip so they follow the shaft as it wears. An oil seal that has hardened lets the shaft pass oil past it, and the damping fades long before the leak becomes visible.\u003c\/p\u003e\u003ch2\u003eWhy the Original\u003c\/h2\u003e\u003cp\u003eThe part number is the contract: it defines material, dimension and finish together. Öhlins manufactures service parts on the same lines as production parts — there is no second quality. We can check the number against the Öhlins exploded view before you order — just ask. If you are unsure which number your unit takes, send us the model and serial number of the damper and we will look it up.\u003c\/p\u003e\u003ch2\u003eGetting the Number Right\u003c\/h2\u003e\u003cp\u003ePart number 00638-73 is unambiguous; the description alone is not, because Öhlins uses similar wording across sizes. Öhlins states inner diameter 32.1 mm, cross section 1.6 mm, material NBR 90 for this number, and those figures are the deciding ones. Öhlins specifies the compound by position: NBR where oil is the concern, FKM where heat is. O-ring sizes are given as inner diameter and cross-section, and both have to match — a close size is not a match.\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 00638-73\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eCategory:\u003c\/em\u003e O-Rings\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eInner Diameter:\u003c\/em\u003e 32.1 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eCross Section:\u003c\/em\u003e 1.6 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eMaterial:\u003c\/em\u003e NBR 90\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":53648926376202,"sku":"00638-73","price":0.84,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/00638-73_a88ca040-bbbd-45c6-a814-f4f4a1869183.png?v=1788872645","url":"https:\/\/inter-pace.com\/en-pt\/products\/ohlins-o-ring-32-1x1-6-nbr-90-00638-73","provider":"Inter-Pace","version":"1.0","type":"link"}