{"product_id":"ohlins-o-ring-20-35x1-78-nbr70-00338-11","title":"Öhlins O-ring 20.35x1.78 NBR70 – 00338-11","description":"\u003cp\u003eO-ring 20.35x1.78 NBR70, Öhlins part number 00338-11. Static seals and dynamic seals are not interchangeable even in the same size.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eOriginal Öhlins service part\u003c\/li\u003e\n\u003cli\u003eMaterial NBR 70\u003c\/li\u003e\n\u003cli\u003eÖhlins part number 00338-11\u003c\/li\u003e\n\u003cli\u003eInner Diameter 20.35 mm\u003c\/li\u003e\n\u003cli\u003eCross Section 1.78 mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFunction\u003c\/h2\u003e\u003cp\u003e20.35 mm, 1.78 mm, NBR 70: that is the whole specification, and it has to match what came out. Cross-section is as important as diameter: an O-ring that is too thin will not seal at pressure. A ring that has taken a set no longer springs back and starts to weep under pressure. Öhlins recommends replacing seals whenever the unit is opened, not only when it leaks.\u003c\/p\u003e\u003ch2\u003eWhy the Original\u003c\/h2\u003e\u003cp\u003eThe part number is the contract: it defines material, dimension and finish together. The tolerances here are the ones the unit was assembled to, not a pattern equivalent's interpretation of them. We can check the number against the Öhlins exploded view before you order — just ask. Order by part number. The dimensions below are the ones Öhlins publishes for it.\u003c\/p\u003e\u003ch2\u003eGetting the Number Right\u003c\/h2\u003e\u003cp\u003eThe reliable route is the exploded drawing: find the position, read the number, order it — 00338-11 in this case. Check inner diameter 20.35 mm, cross section 1.78 mm, material NBR 70 against what you have removed; a close size is not the same part. An oil seal that has hardened lets the shaft pass oil past it, and the damping fades long before the leak becomes visible. Öhlins specifies seal compounds for temperature stability rather than for the lowest unit cost.\u003c\/p\u003e\u003ch2\u003eFitting and Setup Service\u003c\/h2\u003e\u003cp\u003eÖhlins recommends that its units are serviced by an authorised centre. We are one: rebuild, revalve and setup all happen in our own workshop.\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 00338-11\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 20.35 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eCross Section:\u003c\/em\u003e 1.78 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":53646883946762,"sku":"00338-11","price":1.26,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/00338-11_e6216c0e-bb46-42f3-bc7d-fd7be0fd0ebc.png?v=1788869135","url":"https:\/\/inter-pace.com\/products\/ohlins-o-ring-20-35x1-78-nbr70-00338-11","provider":"Inter-Pace","version":"1.0","type":"link"}