{"product_id":"ohlins-piston-21-10-21723-01","title":"Öhlins Piston 21\/10 – 21723-01","description":"\u003cp\u003ePiston 21\/10, Öhlins part number 21723-01. Port area sets how much oil can pass before the shims begin to lift.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eOriginal Öhlins service part\u003c\/li\u003e\n\u003cli\u003eDimension B 10 mm\u003c\/li\u003e\n\u003cli\u003eDimension A 21 mm\u003c\/li\u003e\n\u003cli\u003eÖhlins part number 21723-01\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFunction\u003c\/h2\u003e\u003cp\u003eDimensionally this is 21 mm, 10 mm, which is how it is told apart from the rest of the range. A check valve holds pressure in one direction and opens in the other; a worn one lets damping bleed away. Port area sets how much oil can pass before the shims begin to lift. Öhlins machines the ports rather than casting them, so the edges stay sharp and the flow predictable.\u003c\/p\u003e\u003ch2\u003eOriginal Öhlins Part\u003c\/h2\u003e\u003cp\u003eAn original part keeps the unit within its published specification; a near-equivalent quietly moves it. Öhlins publishes dimensions for its service parts so a workshop can verify before it fits. Order by part number. The dimensions below are the ones Öhlins publishes for it. Tell us the damper's model designation and year and we will match the number for you.\u003c\/p\u003e\u003ch2\u003eIdentifying the Right Part\u003c\/h2\u003e\u003cp\u003eIf the unit is already open, compare the dimensions below with the part in your hand before ordering 21723-01. Check dimension a 21 mm, dimension b 10 mm against what you have removed; a close size is not the same part. Port area sets how much oil can pass before the shims begin to lift. Port area and shim seat geometry decide the damping curve before any adjuster is touched.\u003c\/p\u003e\u003ch2\u003eFitting and Setup Service\u003c\/h2\u003e\u003cp\u003eFitting service parts means opening a pressurised unit. As an authorised Öhlins service centre we do that here, with the right tools and a dyno check afterwards — just ask.\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 21723-01\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 21 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eDimension B:\u003c\/em\u003e 10 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":53652802666762,"sku":"21723-01","price":17000.0,"currency_code":"CDF","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/21723-01_290739bc-724f-4aa8-aa3c-1aaec46fbd54.png?v=1788880147","url":"https:\/\/inter-pace.com\/en-cd\/products\/ohlins-piston-21-10-21723-01","provider":"Inter-Pace","version":"1.0","type":"link"}