{"product_id":"ohlins-piston-band-soft-8-39-21018-02","title":"Öhlins Piston band soft 8\/39 – 21018-02","description":"\u003cp\u003ePiston band soft 8\/39, Öhlins part number 21018-02. Piston bands are consumables — they wear against the bore and lose their seal gradually.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eOriginal Öhlins service part\u003c\/li\u003e\n\u003cli\u003eDimension B 39 mm\u003c\/li\u003e\n\u003cli\u003eÖhlins part number 21018-02\u003c\/li\u003e\n\u003cli\u003eDimension A 8 mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFunction\u003c\/h2\u003e\u003cp\u003e8 mm, 39 mm: that is the whole specification, and it has to match what came out. A scored piston face means oil bypasses the shims entirely. A worn piston band lets oil past the outside of the piston, which shows up as damping that has gone soft. Port area and shim seat geometry decide the damping curve before any adjuster is touched.\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 numbers every position so a workshop can order precisely what it needs, not a whole assembly. If you are unsure which number your unit takes, send us the model and serial number of the damper and we will look it up. Service parts are ordered per piece unless stated otherwise.\u003c\/p\u003e\u003ch2\u003eGetting the Number Right\u003c\/h2\u003e\u003cp\u003ePart number 21018-02 is unambiguous; the description alone is not, because Öhlins uses similar wording across sizes. Öhlins states dimension a 8 mm, dimension b 39 mm for this number, and those figures are the deciding ones. A scored piston face means oil bypasses the shims entirely. Bands are consumables and are replaced at every rebuild.\u003c\/p\u003e\u003ch2\u003eFitting and Setup Service\u003c\/h2\u003e\u003cp\u003eWe are an authorised Öhlins service centre, so you do not have to source the tools and the nitrogen: send us the damper and we rebuild it with the correct parts and the correct setting.\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 21018-02\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eCategory:\u003c\/em\u003e Piston Bands\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eDimension A:\u003c\/em\u003e 8 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eDimension B:\u003c\/em\u003e 39 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":53652473118986,"sku":"21018-02","price":11.3,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/21018-02_44d4be3d-fe52-42c7-a99a-bcafda07fdee.png?v=1788879312","url":"https:\/\/inter-pace.com\/products\/ohlins-piston-band-soft-8-39-21018-02","provider":"Inter-Pace","version":"1.0","type":"link"}