{"product_id":"ohlins-shaft-14-113-5-21003-51","title":"Öhlins Shaft 14\/113.5 – 21003-51","description":"\u003cp\u003eShaft 14\/113.5, Öhlins part number 21003-51. Shaft diameter sets the displaced volume, which is why it is part of the damper's specification.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eOriginal Öhlins service part\u003c\/li\u003e\n\u003cli\u003eDiameter 14 mm\u003c\/li\u003e\n\u003cli\u003eLength 113.5 mm\u003c\/li\u003e\n\u003cli\u003eÖhlins part number 21003-51\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFunction\u003c\/h2\u003e\u003cp\u003e14 mm, 113.5 mm: that is the whole specification, and it has to match what came out. Surface hardness is what lets the shaft survive thousands of cycles through a seal. Chrome or nitride treatment is what lets the shaft run in a seal for thousands of kilometres. Its polished section runs directly in the seal, so any mark there ends the seal's life quickly.\u003c\/p\u003e\u003ch2\u003eWhy the Original\u003c\/h2\u003e\u003cp\u003eParts remain available years after a unit leaves the current price list, which is unusual in this trade. A damper that can be rebuilt is a damper that stays on the bike; that is the whole argument for original service parts. If the unit is already apart, compare the published dimensions with the part in your hand. Service parts are ordered per piece unless stated otherwise.\u003c\/p\u003e\u003ch2\u003eGetting the Number Right\u003c\/h2\u003e\u003cp\u003eThe reliable route is the exploded drawing: find the position, read the number, order it — 21003-51 in this case. Öhlins states diameter 14 mm, length 113.5 mm for this number, and those figures are the deciding ones. The damper shaft carries the piston and passes through the seal head, so its surface finish decides how long the seals last. Chrome or nitride treatment is what lets the shaft run in a seal for thousands of kilometres.\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 21003-51\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eCategory:\u003c\/em\u003e Damper Shafts\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eDiameter:\u003c\/em\u003e 14 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eLength:\u003c\/em\u003e 113.5 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":53652451721482,"sku":"21003-51","price":229.49,"currency_code":"RON","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/21003-51_5529a7fe-057d-4a08-ab90-3443de4a7ee9.png?v=1788879215","url":"https:\/\/inter-pace.com\/en-ro\/products\/ohlins-shaft-14-113-5-21003-51","provider":"Inter-Pace","version":"1.0","type":"link"}