{"product_id":"ohlins-hydr-stop-piston-21-2-16-4-4-6-15441-10","title":"Öhlins Hydr. stop piston 21.2\/16.4\/4.6 – 15441-10","description":"\u003cp\u003eHydr. stop piston 21.2\/16.4\/4.6, Öhlins part number 15441-10. 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\u003eDimension C 4.6 mm\u003c\/li\u003e\n\u003cli\u003eDimension B 16.4 mm\u003c\/li\u003e\n\u003cli\u003eÖhlins part number 15441-10\u003c\/li\u003e\n\u003cli\u003eDimension A 21.2 mm\u003c\/li\u003e\n\u003cli\u003eOriginal Öhlins service part\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat It Is\u003c\/h2\u003e\u003cp\u003e15441-10 is the 21.2 mm, 16.4 mm, 4.6 mm version — Öhlins lists each size separately. Öhlins uses a piston band rather than metal-to-metal contact, which is what keeps the bore intact. Port area and shim seat geometry decide the damping curve before any adjuster is touched. Port area sets how much oil can pass before the shims begin to lift.\u003c\/p\u003e\u003ch2\u003eOriginal Öhlins Part\u003c\/h2\u003e\u003cp\u003eThe part is identical to what Öhlins fits in production — same supplier, same specification. Öhlins manufactures service parts on the same lines as production parts — there is no second quality. If the unit is already apart, compare the published dimensions with the part in your hand. 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\u003e15441-10 is the Öhlins number for this position — the same one printed in the service documentation. Check dimension a 21.2 mm, dimension b 16.4 mm, dimension c 4.6 mm against what you have removed; a close size is not the same part. Öhlins machines its pistons rather than sintering them, which is why the port edges stay sharp. Öhlins uses a piston band rather than metal-to-metal contact, which is what keeps the bore intact.\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 15441-10\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 21.2 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eDimension B:\u003c\/em\u003e 16.4 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eDimension C:\u003c\/em\u003e 4.6 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":53652346863882,"sku":"15441-10","price":56.0,"currency_code":"BBD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/15441-10_c9fb481b-e157-4484-b75a-eacef78b1d14.png?v=1788878842","url":"https:\/\/inter-pace.com\/en-bb\/products\/ohlins-hydr-stop-piston-21-2-16-4-4-6-15441-10","provider":"Inter-Pace","version":"1.0","type":"link"}