{"product_id":"ohlins-adjustment-housing-m44x1-47-5-24-21933-12","title":"Öhlins Adjustment housing M44x1\/47.5\/24 – 21933-12","description":"\u003cp\u003eAdjustment housing M44x1\/47.5\/24, Öhlins part number 21933-12. Hydraulic preload adjusters are sealed units and are replaced rather than opened.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eThread M44x1\u003c\/li\u003e\n\u003cli\u003eDimension B 47.5 mm\u003c\/li\u003e\n\u003cli\u003eDimension A 1 mm\u003c\/li\u003e\n\u003cli\u003eOriginal Öhlins service part\u003c\/li\u003e\n\u003cli\u003eDimension C 24 mm\u003c\/li\u003e\n\u003cli\u003eÖhlins part number 21933-12\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhere It Sits\u003c\/h2\u003e\u003cp\u003eÖhlins publishes 1 mm, 47.5 mm, 24 mm for 21933-12 — the dimensions are the identity of the part. Hydraulic preload adjusters are sealed and pressurised; they are replaced as a unit. The adjustment housing carries the needle, its seat and the detent mechanism. Electronically controlled adjusters replace the needle with a solenoid but keep the same hydraulics.\u003c\/p\u003e\u003ch2\u003eGenuine Service Part\u003c\/h2\u003e\u003cp\u003eThe alternative to a service part is usually a new damper, which is why this catalogue exists. Suspension is one of the few areas where the original part is genuinely the cheaper decision. Öhlins numbers do not follow a logic you can guess — always read them from the documentation. If you are unsure which number your unit takes, send us the model and serial number of the damper and we will look it up.\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 — 21933-12 in this case. The published dimensions are dimension a 1 mm, dimension b 47.5 mm, dimension c 24 mm — measure the old part against them if you are unsure. The adjuster knob is what the rider touches, and Öhlins colour-codes it by function. Adjuster housings carry seals, and a leak there empties the damper as surely as a shaft seal.\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 21933-12\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eCategory:\u003c\/em\u003e Adjustment Housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eDimension A:\u003c\/em\u003e 1 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eDimension B:\u003c\/em\u003e 47.5 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eDimension C:\u003c\/em\u003e 24 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eThread:\u003c\/em\u003e M44x1\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":53652128334090,"sku":"21933-12","price":146.87,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/21933-12_5c4f4c71-a51f-43f3-b6c6-b0cbe2f61b08.png?v=1788878110","url":"https:\/\/inter-pace.com\/products\/ohlins-adjustment-housing-m44x1-47-5-24-21933-12","provider":"Inter-Pace","version":"1.0","type":"link"}