{"product_id":"ohlins-piston-solid-39-21847-02","title":"Öhlins Piston solid 39 – 21847-02","description":"\u003cp\u003ePiston solid 39, Öhlins part number 21847-02. Valves and needles set the adjustable part of the damping; the piston sets the rest.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eÖhlins part number 21847-02\u003c\/li\u003e\n\u003cli\u003eOriginal Öhlins service part\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFunction\u003c\/h2\u003e\u003cp\u003eThere is no measurement to check here — the number and the exploded view identify it. A worn piston band lets oil past the outside of the piston, which shows up as damping that has gone soft. A check valve holds pressure in one direction and opens in the other; a worn one lets damping bleed away. Öhlins machines its pistons so the port edges stay sharp and the flow predictable.\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. Öhlins manufactures service parts on the same lines as production parts — there is no second quality. Ask us before ordering if you are unsure: a wrong part in a pressurised unit is an expensive lesson. For a full rebuild, the seal kit plus the wear parts is usually the sensible order.\u003c\/p\u003e\u003ch2\u003eHow to Be Sure It Fits\u003c\/h2\u003e\u003cp\u003eIf the unit is already open, compare the dimensions below with the part in your hand before ordering 21847-02. Where no measurement is given, the drawing position is what identifies the part. Port area and shim seat geometry decide the damping curve before any adjuster is touched. The piston carries the shim stacks and meters the oil through its ports.\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 21847-02\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eCategory:\u003c\/em\u003e Pistons\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":53652882522378,"sku":"21847-02","price":16.94,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/21847-02_ac5de839-3583-4029-be53-abda345082f4.png?v=1788880327","url":"https:\/\/inter-pace.com\/products\/ohlins-piston-solid-39-21847-02","provider":"Inter-Pace","version":"1.0","type":"link"}