{"product_id":"ohlins-adaptor-base-valve-m8x1-25-34-21758-08","title":"Öhlins Adaptor base valve M8x1.25\/34 – 21758-08","description":"\u003cp\u003eAdaptor base valve M8x1.25\/34, Öhlins part number 21758-08. Öhlins machines its pistons rather than sintering them, which is why the port edges stay sharp.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDimension B 34 mm\u003c\/li\u003e\n\u003cli\u003eOriginal Öhlins service part\u003c\/li\u003e\n\u003cli\u003eThread M8x1.25\u003c\/li\u003e\n\u003cli\u003eÖhlins part number 21758-08\u003c\/li\u003e\n\u003cli\u003eDimension A 1.25 mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFunction\u003c\/h2\u003e\u003cp\u003e1.25 mm, 34 mm: that is the whole specification, and it has to match what came out. A worn piston band lets oil past the outside of the piston, which shows up as damping that has gone soft. Port area sets how much oil can pass before the shims begin to lift. A worn valve bleeds damping away without any visible symptom.\u003c\/p\u003e\u003ch2\u003eOriginal Öhlins Part\u003c\/h2\u003e\u003cp\u003eBuying the individual part rather than a complete assembly is what makes servicing an Öhlins unit worthwhile. Öhlins lists this part under its own number in the service catalogue so a workshop can order exactly what it needs. If the unit is already apart, compare the published dimensions with the part in your hand. We can check the number against the Öhlins exploded view before you order — just ask.\u003c\/p\u003e\u003ch2\u003eIdentifying the Right Part\u003c\/h2\u003e\u003cp\u003eÖhlins identifies this position by the number 21758-08 in the exploded view for the unit it belongs to. The published dimensions are dimension a 1.25 mm, dimension b 34 mm — measure the old part against them if you are unsure. Rebuilding a piston means keeping the shim order, because the stack is the tuning. Replacing a piston is a workshop job because the shim stack has to be rebuilt in the correct order.\u003c\/p\u003e\u003ch2\u003eFitting and Setup Service\u003c\/h2\u003e\u003cp\u003eA damper rebuild is workshop work: it needs the unit dismantled, the shim stack rebuilt in the correct order and the gas charge reset. We are an authorised Öhlins service centre and do exactly that in house — send us the unit or ask us to fit the part with your order.\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 21758-08\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eCategory:\u003c\/em\u003e Valves\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eDimension A:\u003c\/em\u003e 1.25 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eDimension B:\u003c\/em\u003e 34 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eThread:\u003c\/em\u003e M8x1.25\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":53652843200778,"sku":"21758-08","price":82200.0,"currency_code":"XAF","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/21758-08_1779be52-bf24-40ce-93dd-9ad57e3f6895.png?v=1788880214","url":"https:\/\/inter-pace.com\/en-cm\/products\/ohlins-adaptor-base-valve-m8x1-25-34-21758-08","provider":"Inter-Pace","version":"1.0","type":"link"}