{"product_id":"ohlins-shock-spring-95-n-mm-160-mm-51-mm-21040-31","title":"Öhlins Shock Spring 95 N\/mm \/ 160 mm \/ Ø 51 mm – 21040-31","description":"\u003cp\u003eÖhlins part number 21040-31 is a shock absorber spring rated at 95 N\/mm, 160 mm long with a 51 mm inner diameter. A rear spring matched to rider and load keeps the chassis attitude where the factory intended it.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFree length 160 mm\u003c\/li\u003e\n\u003cli\u003ePowder-coated yellow\u003c\/li\u003e\n\u003cli\u003eStraight-wound, constant rate\u003c\/li\u003e\n\u003cli\u003eÖhlins part number 21040-31\u003c\/li\u003e\n\u003cli\u003eMeasured spring rate 95 N\/mm\u003c\/li\u003e\n\u003cli\u003e78 mm of usable stroke\u003c\/li\u003e\n\u003cli\u003eInner diameter 51 mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhy the Rate Holds\u003c\/h2\u003e\u003cp\u003eTwo units carrying the same part number behave the same way out of the box, which is the whole point of testing each one. Service parts stay available for years after a part number leaves the current price list. Öhlins manufactures in Upplands Väsby, north of Stockholm, and assembles and tests every unit there before it ships.\u003c\/p\u003e\u003ch2\u003eDimensions\u003c\/h2\u003e\u003cp\u003eÖhlins holds the free length at 160 mm and the inner diameter at 51 mm across this rate range, so moving up or down a rate changes nothing about the installation.\u003c\/p\u003e\u003ch2\u003eWhat This Rate Does\u003c\/h2\u003e\u003cp\u003eIf the suspension bottoms out or the geometry collapses under load, this is the direction to go. A firm rate keeps the fork high in its stroke under braking, which preserves the geometry when the front is loaded hard. Firm rates also suit machines carrying luggage as a matter of course. Ride quality on the road is decided by rate first and damping second.\u003c\/p\u003e\u003ch2\u003eRate and the Linkage\u003c\/h2\u003e\u003cp\u003eThe rear spring carries the rider, the pillion and the luggage; the front carries only part of it. Progressive springs change rate through the stroke, which suits machines with little travel and a lot of load. A spring that has settled in service sits shorter than new, which quietly lowers the bike and steepens the steering.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cp\u003eRate is the variable that depends on the rider, not on the machine. Two people on the same bike may well want two different numbers. Öhlins builds springs to dimensions rather than to model lists, so the question is always the same: does the diameter fit, does the length fit, and is the rate right for the rider? This is a service part in the proper sense — it wears, it settles, and replacing it restores what the suspension was designed to do.\u003c\/p\u003e\u003ch2\u003eWhat Fitting Involves\u003c\/h2\u003e\u003cp\u003eOil level is measured from the top of the tube with the fork compressed and the spring removed. Springs are supplied ready to fit; no cutting, grinding or packing is needed. Öhlins states an air gap for this application, and that figure is part of the setting rather than a detail.\u003c\/p\u003e\u003ch2\u003eRoad Approval\u003c\/h2\u003e\u003cp\u003eRoad approval: no separate certificate. The spring changes the rate, not the construction of the fork, and is treated as a service part.\u003c\/p\u003e\u003ch2\u003eFitting and Setup Service\u003c\/h2\u003e\u003cp\u003eÖhlins suspension rewards careful fitting. We recommend having the work done by an authorised Öhlins service centre — and we are one ourselves: we fit, service and set up Öhlins components in house. If you would like us to handle the installation, just ask and we will quote it with the 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 21040-31\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eSpring Rate:\u003c\/em\u003e 95 N\/mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eFree Length:\u003c\/em\u003e 160 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eInner Diameter:\u003c\/em\u003e 51 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eStroke:\u003c\/em\u003e 78 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eConstruction:\u003c\/em\u003e Straight\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eFinish:\u003c\/em\u003e Powder-coated yellow\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":53645403390218,"sku":"21040-31","price":97.54,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/RearOhlinsSpring_ac8a9552-c887-4afd-9b73-10128fff07bc.png?v=1788866844","url":"https:\/\/inter-pace.com\/products\/ohlins-shock-spring-95-n-mm-160-mm-51-mm-21040-31","provider":"Inter-Pace","version":"1.0","type":"link"}