{"product_id":"ohlins-piston-12-46-sintered-15039-02","title":"Öhlins Piston 12\/46 sintered – 15039-02","description":"\u003cp\u003ePiston 12\/46 sintered, Öhlins part number 15039-02. Jets meter fixed bleed flow and are sized in tenths of a millimetre.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDimension A 12 mm\u003c\/li\u003e\n\u003cli\u003eÖhlins part number 15039-02\u003c\/li\u003e\n\u003cli\u003eOriginal Öhlins service part\u003c\/li\u003e\n\u003cli\u003eDimension B 46 mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhere It Sits\u003c\/h2\u003e\u003cp\u003eThe published figures are 12 mm, 46 mm. Measure the old part against them before ordering. A worn piston band lets oil past the outside of the piston, which shows up as damping that has gone soft. The piston carries the shim stacks and meters the oil; its port layout is what makes an Öhlins damper behave the way it does. Valves and needles set the adjustable part of the damping; the piston sets the rest.\u003c\/p\u003e\u003ch2\u003eGenuine Service Part\u003c\/h2\u003e\u003cp\u003eÖhlins supports its suspension with individual service parts, which is why a fifteen-year-old damper can still be rebuilt to specification. The tolerances here are the ones the unit was assembled to, not a pattern equivalent's interpretation of them. Öhlins parts are unit-specific: a close dimension is not a substitute. We can check the number against the Öhlins exploded view before you order — just ask.\u003c\/p\u003e\u003ch2\u003eHow to Be Sure It Fits\u003c\/h2\u003e\u003cp\u003eOrder under 15039-02. Where several sizes share a description, only the number separates them. Öhlins states dimension a 12 mm, dimension b 46 mm for this number, and those figures are the deciding ones. Port area and seat geometry decide the damping before any adjuster is touched. Öhlins machines its pistons rather than sintering them, which is why the port edges stay sharp.\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 15039-02\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":53652267270410,"sku":"15039-02","price":17900.0,"currency_code":"XOF","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/15039-02_589dda96-1c34-482c-8717-2b5e9c992353.png?v=1788878434","url":"https:\/\/inter-pace.com\/en-bf\/products\/ohlins-piston-12-46-sintered-15039-02","provider":"Inter-Pace","version":"1.0","type":"link"}