{"product_id":"ohlins-piston-8-30-21645-03","title":"Öhlins Piston 8\/30 – 21645-03","description":"\u003cp\u003ePiston 8\/30, Öhlins part number 21645-03. Port area and shim seat geometry decide the damping curve before any adjuster is touched.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eÖhlins part number 21645-03\u003c\/li\u003e\n\u003cli\u003eDimension B 30 mm\u003c\/li\u003e\n\u003cli\u003eOriginal Öhlins service part\u003c\/li\u003e\n\u003cli\u003eDimension A 8 mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFunction\u003c\/h2\u003e\u003cp\u003eAt 8 mm, 30 mm it fits one position only; the next size up carries a different number. Öhlins machines the ports rather than casting them, so the edges stay sharp and the flow predictable. Port area and seat geometry decide the damping before any adjuster is touched. Öhlins machines its pistons so the port edges stay sharp and the flow predictable.\u003c\/p\u003e\u003ch2\u003eOriginal Öhlins Part\u003c\/h2\u003e\u003cp\u003eThis is an original Öhlins part, not an aftermarket equivalent — the tolerances are the ones the unit was assembled to. Öhlins publishes dimensions for its service parts so a workshop can verify before it fits. Tell us the damper's model designation and year and we will match the number for you. Order by part number. The dimensions below are the ones Öhlins publishes for it.\u003c\/p\u003e\u003ch2\u003eIdentifying the Right Part\u003c\/h2\u003e\u003cp\u003eOrder under 21645-03. Where several sizes share a description, only the number separates them. Öhlins states dimension a 8 mm, dimension b 30 mm for this number, and those figures are the deciding ones. The seat face has to be flat enough for the first shim to seal against it. Öhlins machines its pistons so the port edges stay sharp and the flow predictable.\u003c\/p\u003e\u003ch2\u003eFitting and Setup Service\u003c\/h2\u003e\u003cp\u003eA damper rebuild is workshop work: it needs the unit dismantled, the shim stack rebuilt in the correct order and the gas charge reset. We are an authorised Öhlins service centre and do exactly that in house — send us the unit or ask us to fit the part with your order.\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 21645-03\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eCategory:\u003c\/em\u003e Pistons\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 30 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":53652644495626,"sku":"21645-03","price":189.0,"currency_code":"QAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/21645-03_061cd61c-0f80-47ee-b3c1-13d561c2c27f.png?v=1788879823","url":"https:\/\/inter-pace.com\/en-qa\/products\/ohlins-piston-8-30-21645-03","provider":"Inter-Pace","version":"1.0","type":"link"}