{"product_id":"ohlins-adaptor-base-valve-m10x1-5-32-21758-04","title":"Öhlins Adaptor base valve M10x1.5\/32 – 21758-04","description":"\u003cp\u003eAdaptor base valve M10x1.5\/32, Öhlins part number 21758-04. Replacing a piston is a workshop job because the shim stack has to be rebuilt in the correct order.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eThread M10x1.5\u003c\/li\u003e\n\u003cli\u003eDimension A 1.5 mm\u003c\/li\u003e\n\u003cli\u003eÖhlins part number 21758-04\u003c\/li\u003e\n\u003cli\u003eOriginal Öhlins service part\u003c\/li\u003e\n\u003cli\u003eDimension B 32 mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat It Is\u003c\/h2\u003e\u003cp\u003eThe published figures are 1.5 mm, 32 mm. Measure the old part against them before ordering. Rebuilding a piston means keeping the shim order, because the stack is the tuning. Needle geometry sets the shape of the adjustable range, not just its size. Öhlins builds the seat into the housing so the sealing face is machined, not pressed.\u003c\/p\u003e\u003ch2\u003eOriginal Öhlins 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. Buying the individual part rather than a complete assembly is what makes servicing an Öhlins unit worthwhile. The exploded drawing for your unit names the number; if you do not have it, we do. Öhlins numbers do not follow a logic you can guess — always read them from the documentation.\u003c\/p\u003e\u003ch2\u003eGetting the Number Right\u003c\/h2\u003e\u003cp\u003ePart number 21758-04 is unambiguous; the description alone is not, because Öhlins uses similar wording across sizes. The published dimensions are dimension a 1.5 mm, dimension b 32 mm — measure the old part against them if you are unsure. Piston bands are consumables — they wear against the bore and lose their seal gradually. A worn piston band lets oil past the outside of the piston, which shows up as damping that has gone soft.\u003c\/p\u003e\u003ch2\u003eFitting and Setup Service\u003c\/h2\u003e\u003cp\u003eWe are an authorised Öhlins service centre, so you do not have to source the tools and the nitrogen: send us the damper and we rebuild it with the correct parts and the correct setting.\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 21758-04\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 1.5 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eDimension B:\u003c\/em\u003e 32 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eThread:\u003c\/em\u003e M10x1.5\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":53652841103626,"sku":"21758-04","price":101.07,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/21758-04_1b461e56-075f-4f5f-af21-9da20a8792ac.png?v=1788880209","url":"https:\/\/inter-pace.com\/products\/ohlins-adaptor-base-valve-m10x1-5-32-21758-04","provider":"Inter-Pace","version":"1.0","type":"link"}