{"product_id":"ohlins-shaft-extension-m13x1-m17x1-85-21023-05","title":"Öhlins Shaft extension M13x1\/M17x1\/85 – 21023-05","description":"\u003cp\u003eShaft extension M13x1\/M17x1\/85, Öhlins part number 21023-05. A bent shaft drags in the head and destroys the seal within hours — replace, never straighten.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eÖhlins part number 21023-05\u003c\/li\u003e\n\u003cli\u003eDiameter 1 mm\u003c\/li\u003e\n\u003cli\u003eLength 85 mm\u003c\/li\u003e\n\u003cli\u003eOriginal Öhlins service part\u003c\/li\u003e\n\u003cli\u003eThread M13x1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhere It Sits\u003c\/h2\u003e\u003cp\u003eÖhlins gives it as 1 mm, 85 mm; nothing about that is approximate. Surface hardness is what lets the shaft survive thousands of cycles through a seal. This is a part that is replaced rather than repaired. The damper shaft carries the piston and passes through the seal head, so its surface finish decides how long the seals last.\u003c\/p\u003e\u003ch2\u003eWhy the Original\u003c\/h2\u003e\u003cp\u003eThis is an original Öhlins part, not an aftermarket equivalent — the tolerances are the ones the unit was assembled to. Rebuilding to specification only works if the parts are to specification — that starts here. Service parts are ordered per piece unless stated otherwise. For a full rebuild, the seal kit plus the wear parts is usually the sensible order.\u003c\/p\u003e\u003ch2\u003eIdentifying the Right Part\u003c\/h2\u003e\u003cp\u003eÖhlins identifies this position by the number 21023-05 in the exploded view for the unit it belongs to. Check diameter 1 mm, length 85 mm against what you have removed; a close size is not the same part. The shaft is threaded at both ends: piston at one, mounting at the other. Öhlins offers several lengths per diameter because stroke differs by model.\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 21023-05\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":53652476526858,"sku":"21023-05","price":53.43,"currency_code":"CHF","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/21023-05_9cc232bc-d443-4dfe-9ea0-68d627efb6a8.png?v=1788879329","url":"https:\/\/inter-pace.com\/en-ch\/products\/ohlins-shaft-extension-m13x1-m17x1-85-21023-05","provider":"Inter-Pace","version":"1.0","type":"link"}