{"product_id":"ohlins-o-ring-37x2-nbr90-00638-80","title":"Öhlins O-ring 37x2 NBR90 – 00638-80","description":"\u003cp\u003eO-ring 37x2 NBR90, Öhlins part number 00638-80. An O-ring seals by being squeezed into its groove; the cross-section is therefore as important as the diameter.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eÖhlins part number 00638-80\u003c\/li\u003e\n\u003cli\u003eInner Diameter 37 mm\u003c\/li\u003e\n\u003cli\u003eOriginal Öhlins service part\u003c\/li\u003e\n\u003cli\u003eCross Section 2 mm\u003c\/li\u003e\n\u003cli\u003eMaterial NBR 90\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFunction\u003c\/h2\u003e\u003cp\u003eDimensionally this is 37 mm, 2 mm, NBR 90, which is how it is told apart from the rest of the range. Replacing seals at service intervals is far cheaper than replacing what a failed seal damages. The groove does half the work: the ring only seals if the groove is clean and undamaged. O-rings are single-use in a pressurised damper — they are replaced whenever the unit is opened.\u003c\/p\u003e\u003ch2\u003eWhy the Original\u003c\/h2\u003e\u003cp\u003eA damper that can be rebuilt is a damper that stays on the bike; that is the whole argument for original service parts. Rebuilding to specification only works if the parts are to specification — that starts here. Order by part number — descriptions repeat across sizes, numbers do not. The exploded drawing for your unit names the number; if you do not have it, we do.\u003c\/p\u003e\u003ch2\u003eHow to Be Sure It Fits\u003c\/h2\u003e\u003cp\u003ePart number 00638-80 is unambiguous; the description alone is not, because Öhlins uses similar wording across sizes. Öhlins states inner diameter 37 mm, cross section 2 mm, material NBR 90 for this number, and those figures are the deciding ones. A seal that has taken a set no longer springs back and starts to weep. Seals harden with heat and age even when the machine has not been ridden much.\u003c\/p\u003e\u003ch2\u003eFitting and Setup Service\u003c\/h2\u003e\u003cp\u003eFitting service parts means opening a pressurised unit. As an authorised Öhlins service centre we do that here, with the right tools and a dyno check afterwards — just ask.\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 00638-80\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 37 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eCross Section:\u003c\/em\u003e 2 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":53648929521930,"sku":"00638-80","price":30.74,"currency_code":"DKK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/00638-80_9111bc28-c14f-42d8-9051-6b80d401645e.png?v=1788872653","url":"https:\/\/inter-pace.com\/en-gl\/products\/ohlins-o-ring-37x2-nbr90-00638-80","provider":"Inter-Pace","version":"1.0","type":"link"}