{"product_id":"ohlins-piston-12-46-sintered-low-friction-15039-03","title":"Öhlins Piston 12\/46 Sintered Low Friction – 15039-03","description":"\u003cp\u003ePiston 12\/46 Sintered Low Friction, Öhlins part number 15039-03. Rebuilding a piston means keeping the shim order, because the stack is the tuning.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eÖhlins part number 15039-03\u003c\/li\u003e\n\u003cli\u003eOriginal Öhlins service part\u003c\/li\u003e\n\u003cli\u003eDimension B 46 mm\u003c\/li\u003e\n\u003cli\u003eDimension A 12 mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhere It Sits\u003c\/h2\u003e\u003cp\u003eÖhlins publishes 12 mm, 46 mm for 15039-03 — the dimensions are the identity of the part. Valves and needles set the adjustable part of the damping; the piston sets the rest. A scored piston face means oil bypasses the shims entirely. Piston bands are consumables — they wear against the bore and lose their seal gradually.\u003c\/p\u003e\u003ch2\u003eWhy the Original\u003c\/h2\u003e\u003cp\u003eBuying the individual part rather than a complete assembly is what makes servicing an Öhlins unit worthwhile. Öhlins supports units that are decades old, which is why the spare parts list runs to thousands of numbers. If the unit is already apart, compare the published dimensions with the part in your hand. Send us the model and serial number of your unit and we will confirm the position before you order.\u003c\/p\u003e\u003ch2\u003eHow to Be Sure It Fits\u003c\/h2\u003e\u003cp\u003ePart number 15039-03 is unambiguous; the description alone is not, because Öhlins uses similar wording across sizes. Öhlins states dimension a 12 mm, dimension b 46 mm for this number, and those figures are the deciding ones. Rebuilding a piston means keeping the shim order, because the stack is the tuning. The piston carries the shim stacks and meters the oil; its port layout is what makes an Öhlins damper behave the way it does.\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 15039-03\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 12 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eDimension B:\u003c\/em\u003e 46 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":53649549459722,"sku":"15039-03","price":58.71,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/15039-03_c3070565-45f8-40d5-bf88-0e8099e6b3bb.png?v=1788875961","url":"https:\/\/inter-pace.com\/en-ht\/products\/ohlins-piston-12-46-sintered-low-friction-15039-03","provider":"Inter-Pace","version":"1.0","type":"link"}