{"product_id":"ohlins-shaft-extension-m13x1-m17x1-85-21020-40","title":"Öhlins Shaft extension M13x1\/M17x1\/85 – 21020-40","description":"\u003cp\u003eShaft extension M13x1\/M17x1\/85, Öhlins part number 21020-40. A shaft is measured by diameter and overall length, and both are specific to the unit it belongs to.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eThread M13x1\u003c\/li\u003e\n\u003cli\u003eLength 85 mm\u003c\/li\u003e\n\u003cli\u003eDiameter 1 mm\u003c\/li\u003e\n\u003cli\u003eOriginal Öhlins service part\u003c\/li\u003e\n\u003cli\u003eÖhlins part number 21020-40\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat It Is\u003c\/h2\u003e\u003cp\u003eAt 1 mm, 85 mm it fits one position only; the next size up carries a different number. Any mark on the polished section is a reason to replace rather than to reassemble. Shaft diameter sets the displaced volume, which is why it is part of the damper's specification. Shaft diameter sets the volume displaced into the reservoir on every compression stroke.\u003c\/p\u003e\u003ch2\u003eWhy the Original\u003c\/h2\u003e\u003cp\u003eÖhlins keeps service parts available for units long after they leave the current price list. Öhlins publishes dimensions for its service parts so a workshop can verify before it fits. Öhlins numbers do not follow a logic you can guess — always read them from the documentation. Öhlins parts are unit-specific: a close dimension is not a substitute.\u003c\/p\u003e\u003ch2\u003eIdentifying the Right Part\u003c\/h2\u003e\u003cp\u003ePart number 21020-40 is unambiguous; the description alone is not, because Öhlins uses similar wording across sizes. diameter 1 mm, length 85 mm is what distinguishes this number from its neighbours in the range. Shaft straightness matters: a bent shaft drags in the seal head and destroys the seal within hours. Öhlins offers shafts in several lengths per diameter because the stroke differs by model.\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 21020-40\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eCategory:\u003c\/em\u003e Damper Shafts\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eDiameter:\u003c\/em\u003e 1 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eLength:\u003c\/em\u003e 85 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eThread:\u003c\/em\u003e M13x1\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":53652474790154,"sku":"21020-40","price":114.91,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/21020-40_e61f10f3-b37e-4550-93db-20cb4103d53b.png?v=1788879321","url":"https:\/\/inter-pace.com\/products\/ohlins-shaft-extension-m13x1-m17x1-85-21020-40","provider":"Inter-Pace","version":"1.0","type":"link"}