{"product_id":"ohlins-o-ring-57x2-5-nbr70-00438-48","title":"Öhlins O-ring 57x2.5 NBR70 – 00438-48","description":"\u003cp\u003eO-ring 57x2.5 NBR70, Öhlins part number 00438-48. 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\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eÖhlins part number 00438-48\u003c\/li\u003e\n\u003cli\u003eOriginal Öhlins service part\u003c\/li\u003e\n\u003cli\u003eCross Section 2.5 mm\u003c\/li\u003e\n\u003cli\u003eMaterial NBR 70\u003c\/li\u003e\n\u003cli\u003eInner Diameter 57 mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat It Is\u003c\/h2\u003e\u003cp\u003eÖhlins publishes 57 mm, 2.5 mm, NBR 70 for 00438-48 — the dimensions are the identity of the part. A leaking damper is not a cosmetic problem: it is a damper that has stopped controlling the wheel. Size is given as inner diameter and cross-section; a close size is not a match. Öhlins recommends replacing seals whenever the unit is opened, not only when it leaks.\u003c\/p\u003e\u003ch2\u003eGenuine Service Part\u003c\/h2\u003e\u003cp\u003eThis is an original Öhlins part, not an aftermarket equivalent — the tolerances are the ones the unit was assembled to. An original part keeps the unit within its published specification; a near-equivalent quietly moves it. Service parts are ordered per piece unless stated otherwise. We can check the number against the Öhlins exploded view before you order — just ask.\u003c\/p\u003e\u003ch2\u003eHow to Be Sure It Fits\u003c\/h2\u003e\u003cp\u003e00438-48 is the Öhlins number for this position — the same one printed in the service documentation. Öhlins states inner diameter 57 mm, cross section 2.5 mm, material NBR 70 for this number, and those figures are the deciding ones. Seal kits gather the pieces one rebuild needs, which avoids a second order mid-job. The groove does half the work: the ring only seals if the groove is clean and undamaged.\u003c\/p\u003e\u003ch2\u003eFitting and Setup Service\u003c\/h2\u003e\u003cp\u003eAsk us about a full service: as an authorised Öhlins centre we strip, inspect, replace what is worn and set the unit back to its specification.\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 00438-48\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 57 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eCross Section:\u003c\/em\u003e 2.5 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eMaterial:\u003c\/em\u003e NBR 70\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":53646900953354,"sku":"00438-48","price":2.46,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/00438-48_66d66271-dec9-4a95-8a98-967d4703ff3d.png?v=1788869410","url":"https:\/\/inter-pace.com\/en-ec\/products\/ohlins-o-ring-57x2-5-nbr70-00438-48","provider":"Inter-Pace","version":"1.0","type":"link"}