{"product_id":"ohlins-shaft-extension-m13x1-m17x1-75-21020-30","title":"Öhlins Shaft extension M13x1\/M17x1\/75 – 21020-30","description":"\u003cp\u003eShaft extension M13x1\/M17x1\/75, Öhlins part number 21020-30. Adjuster shafts run inside the main shaft on units with a rod-through adjuster.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eÖhlins part number 21020-30\u003c\/li\u003e\n\u003cli\u003eOriginal Öhlins service part\u003c\/li\u003e\n\u003cli\u003eDiameter 1 mm\u003c\/li\u003e\n\u003cli\u003eLength 75 mm\u003c\/li\u003e\n\u003cli\u003eThread M13x1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhere It Sits\u003c\/h2\u003e\u003cp\u003eDimensionally this is 1 mm, 75 mm, which is how it is told apart from the rest of the range. Corrosion on a stored damper usually starts on the exposed shaft. Shaft straightness matters: a bent shaft drags in the seal head and destroys the seal within hours. Surface hardness is what lets the shaft survive thousands of cycles through a seal.\u003c\/p\u003e\u003ch2\u003eWhy the Original\u003c\/h2\u003e\u003cp\u003eÖhlins supports its suspension with individual service parts, which is why a fifteen-year-old damper can still be rebuilt to specification. The tolerances here are the ones the unit was assembled to, not a pattern equivalent's interpretation of them. Öhlins parts are unit-specific: a close dimension is not a substitute. The exploded drawing for your unit names the number; if you do not have it, we do.\u003c\/p\u003e\u003ch2\u003eIdentifying the Right Part\u003c\/h2\u003e\u003cp\u003e21020-30 is the Öhlins number for this position — the same one printed in the service documentation. The published dimensions are diameter 1 mm, length 75 mm — measure the old part against them if you are unsure. Shaft diameter sets the volume displaced into the reservoir on every compression stroke. The damper shaft carries the piston through the oil and out through the seal head.\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 21020-30\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 75 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":53649966629130,"sku":"21020-30","price":14681.0,"currency_code":"ETB","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/21020-30_73b9239c-9f39-4120-8d2d-69e3855c8b9e.png?v=1788876883","url":"https:\/\/inter-pace.com\/en-et\/products\/ohlins-shaft-extension-m13x1-m17x1-75-21020-30","provider":"Inter-Pace","version":"1.0","type":"link"}