{"product_id":"ohlins-fork-leg-inner-43-39-5-531-21634-01","title":"Öhlins Fork leg inner 43\/39.5\/531 – 21634-01","description":"\u003cp\u003eFork leg inner 43\/39.5\/531, Öhlins part number 21634-01. Fork legs are matched left and right on most Öhlins forks and are listed separately.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDimension B 39.5 mm\u003c\/li\u003e\n\u003cli\u003eÖhlins part number 21634-01\u003c\/li\u003e\n\u003cli\u003eDimension C 531 mm\u003c\/li\u003e\n\u003cli\u003eOriginal Öhlins service part\u003c\/li\u003e\n\u003cli\u003eDimension A 43 mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat It Is\u003c\/h2\u003e\u003cp\u003e21634-01 is the 43 mm, 39.5 mm, 531 mm version — Öhlins lists each size separately. Fork parts are specific to the fork, not to the motorcycle it happens to be fitted to. Bushings in the fork carry the side load; play there shows up as knocking under braking. Outer tubes hold the bushings and the seal head, so their bore finish matters as much as the inner tube's outside.\u003c\/p\u003e\u003ch2\u003eWhy the Original\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. This is an original Öhlins part, not an aftermarket equivalent — the tolerances are the ones the unit was assembled to. Where a number has been superseded, Öhlins states the replacement — we pass that on. The Öhlins exploded view names the number for each position; we can look it up if you do not have it.\u003c\/p\u003e\u003ch2\u003eGetting the Number Right\u003c\/h2\u003e\u003cp\u003ePart number 21634-01 is unambiguous; the description alone is not, because Öhlins uses similar wording across sizes. The published dimensions are dimension a 43 mm, dimension b 39.5 mm, dimension c 531 mm — measure the old part against them if you are unsure. Öhlins publishes tube diameters by fork model, and they are not interchangeable across the range. Inner tubes carry a low-friction coating; once it is through, the seals wear quickly.\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 21634-01\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eCategory:\u003c\/em\u003e Fork Parts\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eDimension A:\u003c\/em\u003e 43 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eDimension B:\u003c\/em\u003e 39.5 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eDimension C:\u003c\/em\u003e 531 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":53650743558410,"sku":"21634-01","price":1296.0,"currency_code":"PGK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/21634-01_34a30f94-2a02-4f0b-8faa-b939a0ae11e0.png?v=1788877363","url":"https:\/\/inter-pace.com\/en-pg\/products\/ohlins-fork-leg-inner-43-39-5-531-21634-01","provider":"Inter-Pace","version":"1.0","type":"link"}