{"product_id":"ohlins-piston-band-soft-55-1-5-3-2-21863-01","title":"Öhlins Piston band soft 55\/1.5\/3.2 – 21863-01","description":"\u003cp\u003ePiston band soft 55\/1.5\/3.2, Öhlins part number 21863-01. A check valve holds pressure in one direction and opens in the other; a worn one lets damping bleed away.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eÖhlins part number 21863-01\u003c\/li\u003e\n\u003cli\u003eDimension B 1.5 mm\u003c\/li\u003e\n\u003cli\u003eOriginal Öhlins service part\u003c\/li\u003e\n\u003cli\u003eDimension C 3.2 mm\u003c\/li\u003e\n\u003cli\u003eDimension A 55 mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFunction\u003c\/h2\u003e\u003cp\u003eDimensionally this is 55 mm, 1.5 mm, 3.2 mm, which is how it is told apart from the rest of the range. The seat face has to be flat enough for the first shim to seal against it. Needle geometry sets the shape of the adjustable range, not just its size. A scored piston face means oil bypasses the shims entirely.\u003c\/p\u003e\u003ch2\u003eWhy the Original\u003c\/h2\u003e\u003cp\u003eThe tolerances here are the ones the unit was assembled to, not a pattern equivalent's interpretation of them. Öhlins is one of the few suspension makers that still supplies every position in the exploded view as a single part. Send us the model and serial number of your unit and we will confirm the position before you order. Ask us before ordering if you are unsure: a wrong part in a pressurised unit is an expensive lesson.\u003c\/p\u003e\u003ch2\u003eGetting the Number Right\u003c\/h2\u003e\u003cp\u003ePart number 21863-01 is unambiguous; the description alone is not, because Öhlins uses similar wording across sizes. Öhlins states dimension a 55 mm, dimension b 1.5 mm, dimension c 3.2 mm for this number, and those figures are the deciding ones. Needle geometry sets the shape of the adjustable range, not just its size. A worn band lets oil past the outside of the piston, which feels like damping that has gone soft.\u003c\/p\u003e\u003ch2\u003eFitting and Setup Service\u003c\/h2\u003e\u003cp\u003eAsk us about a full service: as an authorised Öhlins centre we strip, inspect, replace what is worn and set the unit back to its specification.\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 21863-01\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eCategory:\u003c\/em\u003e Piston Bands\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eDimension A:\u003c\/em\u003e 55 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eDimension B:\u003c\/em\u003e 1.5 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eDimension C:\u003c\/em\u003e 3.2 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":53651907379466,"sku":"21863-01","price":7.34,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/21863-01_cb5d42cc-f2d7-4652-8954-6fef47ccebf9.png?v=1788877927","url":"https:\/\/inter-pace.com\/products\/ohlins-piston-band-soft-55-1-5-3-2-21863-01","provider":"Inter-Pace","version":"1.0","type":"link"}