{"product_id":"ohlins-cylinder-head-ttx36-21874-01","title":"Öhlins Cylinder head TTX36 – 21874-01","description":"\u003cp\u003eCylinder head TTX36, Öhlins part number 21874-01. Corrosion inside a tube is terminal: it cannot be honed out without changing the clearance.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eÖhlins part number 21874-01\u003c\/li\u003e\n\u003cli\u003eOriginal Öhlins service part\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhere It Sits\u003c\/h2\u003e\u003cp\u003eÖhlins publishes no separate dimension for this position, so the part number carries the identity. The cylinder tube is the working bore of the damper: the piston runs in it, and its finish decides how well the piston rings seal. Öhlins turns and hones each tube to a defined roundness, because an out-of-round bore leaks past the piston. The cylinder head closes the working bore and carries the shaft seal and its bushing.\u003c\/p\u003e\u003ch2\u003eOriginal Öhlins Part\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 part is identical to what Öhlins fits in production — same supplier, same specification. Tell us the damper's model designation and year and we will match the number for you. For a full rebuild, the seal kit plus the wear parts is usually the sensible order.\u003c\/p\u003e\u003ch2\u003eHow to Be Sure It Fits\u003c\/h2\u003e\u003cp\u003eThe reliable route is the exploded drawing: find the position, read the number, order it — 21874-01 in this case. This position has no published dimension, so the part number is the only reliable identifier. Surface finish is specified in microns, because it decides how quickly the piston band wears. Most seal kits are built around a specific head design.\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 21874-01\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eCategory:\u003c\/em\u003e Cylinder Heads\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":53652900741386,"sku":"21874-01","price":329.0,"currency_code":"BBD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/21874-01_30a61212-0e4c-4039-865c-dbc138a6fef3.png?v=1788880380","url":"https:\/\/inter-pace.com\/en-bb\/products\/ohlins-cylinder-head-ttx36-21874-01","provider":"Inter-Pace","version":"1.0","type":"link"}