{"product_id":"ohlins-piston-reservoir-15831-01","title":"Öhlins Piston reservoir – 15831-01","description":"\u003cp\u003ePiston reservoir, Öhlins part number 15831-01. Port area and seat geometry decide the damping before any adjuster is touched.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eOriginal Öhlins service part\u003c\/li\u003e\n\u003cli\u003eÖhlins part number 15831-01\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhere It Sits\u003c\/h2\u003e\u003cp\u003eThis position is identified by its number rather than by a dimension. A worn piston band lets oil past the outside of the piston, which shows up as damping that has gone soft. Port area sets how much oil can pass before the shims begin to lift. Öhlins uses a piston band rather than metal-to-metal contact, which is what keeps the bore intact.\u003c\/p\u003e\u003ch2\u003eWhy the Original\u003c\/h2\u003e\u003cp\u003eÖhlins is one of the few suspension makers that still supplies every position in the exploded view as a single part. The tolerances here are the ones the unit was assembled to, not a pattern equivalent's interpretation of them. We can check the number against the Öhlins exploded view before you order — just ask. Ask us before ordering if you are unsure: a wrong part in a pressurised unit is an expensive lesson.\u003c\/p\u003e\u003ch2\u003eIdentifying the Right Part\u003c\/h2\u003e\u003cp\u003eThe reliable route is the exploded drawing: find the position, read the number, order it — 15831-01 in this case. Öhlins does not publish a dimension here — go by the number and the exploded view. Port area and seat geometry decide the damping before any adjuster is touched. The piston carries the shim stacks and meters the oil through its ports.\u003c\/p\u003e\u003ch2\u003eFitting and Setup Service\u003c\/h2\u003e\u003cp\u003eIf you would rather not open the damper yourself, we can do it — we are an authorised Öhlins service centre and rebuild these units as a matter of routine.\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 15831-01\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eCategory:\u003c\/em\u003e Pistons\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":53652419805450,"sku":"15831-01","price":33.64,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/15831-01_9c25e365-173d-4267-9034-ca587bf7f14d.png?v=1788879104","url":"https:\/\/inter-pace.com\/products\/ohlins-piston-reservoir-15831-01","provider":"Inter-Pace","version":"1.0","type":"link"}