{"product_id":"ohlins-shaft-12-423-alu-21637-02","title":"Öhlins Shaft 12\/423 Alu – 21637-02","description":"\u003cp\u003eShaft 12\/423 Alu, Öhlins part number 21637-02. 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\u003eOriginal Öhlins service part\u003c\/li\u003e\n\u003cli\u003eLength 423 mm\u003c\/li\u003e\n\u003cli\u003eDiameter 12 mm\u003c\/li\u003e\n\u003cli\u003eÖhlins part number 21637-02\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat It Is\u003c\/h2\u003e\u003cp\u003e21637-02 is the 12 mm, 423 mm version — Öhlins lists each size separately. The damper shaft carries the piston and passes through the seal head, so its surface finish decides how long the seals last. Any mark on the polished section is a reason to replace rather than to reassemble. A bent shaft drags in the head and destroys the seal within hours — replace, never straighten.\u003c\/p\u003e\u003ch2\u003eWhy the Original\u003c\/h2\u003e\u003cp\u003eÖhlins supports units that are decades old, which is why the spare parts list runs to thousands of numbers. Öhlins supports its suspension with individual service parts, which is why a fifteen-year-old damper can still be rebuilt to specification. Order by part number — descriptions repeat across sizes, numbers do not. Send us the model and serial number of your unit and we will confirm the position before you order.\u003c\/p\u003e\u003ch2\u003eHow to Be Sure It Fits\u003c\/h2\u003e\u003cp\u003e21637-02 is the Öhlins number for this position — the same one printed in the service documentation. Check diameter 12 mm, length 423 mm against what you have removed; a close size is not the same part. A bent shaft drags in the head and destroys the seal within hours — replace, never straighten. Shaft diameter sets the volume displaced into the reservoir on every compression stroke.\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 21637-02\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 12 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eLength:\u003c\/em\u003e 423 mm\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":53652639842570,"sku":"21637-02","price":7400.0,"currency_code":"PHP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/21637-02_10ed712e-8baa-46a9-bc74-435e697cabe0.png?v=1788879796","url":"https:\/\/inter-pace.com\/en-ph\/products\/ohlins-shaft-12-423-alu-21637-02","provider":"Inter-Pace","version":"1.0","type":"link"}