{"product_id":"ohlins-piston-band-sd-20-21019-01","title":"Öhlins Piston band SD 20 – 21019-01","description":"\u003cp\u003ePiston band SD 20, Öhlins part number 21019-01. Öhlins uses a piston band rather than metal-to-metal contact, which is what keeps the bore intact.\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 21019-01\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. Valves and needles set the adjustable part of the damping; the piston sets the rest. A worn piston band lets oil past the outside of the piston, which shows up as damping that has gone soft. The piston band seals the piston against the bore without metal contact.\u003c\/p\u003e\u003ch2\u003eWhy the Original\u003c\/h2\u003e\u003cp\u003eÖhlins lists this part under its own number in the service catalogue so a workshop can order exactly what it needs. Suspension is one of the few areas where the original part is genuinely the cheaper decision. Order by part number — descriptions repeat across sizes, numbers do not. We can supply the whole position from the drawing rather than the single piece if that is easier.\u003c\/p\u003e\u003ch2\u003eGetting the Number Right\u003c\/h2\u003e\u003cp\u003ePart number 21019-01 is unambiguous; the description alone is not, because Öhlins uses similar wording across sizes. This position has no published dimension, so the part number is the only reliable identifier. The piston band seals the piston against the bore without metal contact. Needle geometry sets the shape of the adjustable range, not just its size.\u003c\/p\u003e\u003ch2\u003eFitting and Setup Service\u003c\/h2\u003e\u003cp\u003eA damper rebuild is workshop work: it needs the unit dismantled, the shim stack rebuilt in the correct order and the gas charge reset. We are an authorised Öhlins service centre and do exactly that in house — send us the unit or ask us to fit the part with your order.\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 21019-01\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eCategory:\u003c\/em\u003e Piston Bands\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":53652473938186,"sku":"21019-01","price":8.64,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/21019-01_1d562442-754a-49a1-8853-8789ba3e0fa2.png?v=1788879317","url":"https:\/\/inter-pace.com\/products\/ohlins-piston-band-sd-20-21019-01","provider":"Inter-Pace","version":"1.0","type":"link"}