{"product_id":"ohlins-stx-46-blackline-shock-absorber-bmw-r-ninet-5-2019-2020-bm-491","title":"Öhlins STX 46 Blackline Shock Absorber BMW R nineT \/5 (2019–2020) – BM 491","description":"\u003cp\u003eEvery Öhlins part number covers one machine. BM 491 covers the BMW R nineT \/5 (2019–2020). The difference shows up in the second half of a fast road, when the standard unit has warmed through.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eGas-pressurised monotube damper with the reservoir integrated into the body\u003c\/li\u003e\n\u003cli\u003eFitted spring: Öhlins 21102-54\u003c\/li\u003e\n\u003cli\u003eLength 374 +10 \/ -2 mm, set for this chassis\u003c\/li\u003e\n\u003cli\u003eDirect fitment on the BMW R nineT \/5 (2019–2020)\u003c\/li\u003e\n\u003cli\u003e53 mm of damper stroke\u003c\/li\u003e\n\u003cli\u003eMonotube damper layout\u003c\/li\u003e\n\u003cli\u003eSpring rate 140 N\/mm, set against this machine's weight\u003c\/li\u003e\n\u003cli\u003eDamping piston: 46 mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhere This Sits in the Öhlins Line-up\u003c\/h2\u003e\u003cp\u003eBlack anodising is applied to the body and reservoir, and the spring is powder-coated black to match. Öhlins introduced Blackline for machines whose own colour scheme fights with yellow-gold. Blackline is the STX 46 with a black-anodised body and black spring rather than the familiar Öhlins gold.\u003c\/p\u003e\u003ch2\u003eDamping Performance\u003c\/h2\u003e\u003cp\u003eA 46 mm piston gives the oil a large working area, so the force curve stays flat as temperature rises. 374 +10 \/ -2 mm of adjustment turns ride height into a setting rather than a fixed dimension. Öhlins identifies the spring as 21102-54. Mounting length is 372\/384 mm. Öhlins publishes a baseline setting for each part number, which is the sensible starting point. Compression and rebound are adjusted independently, so support under load can be set without changing how fast the wheel returns.\u003c\/p\u003e\u003ch2\u003eConstruction and Material Quality\u003c\/h2\u003e\u003cp\u003eÖhlins sets a baseline for each part number on the machine it was developed on, so it works before anything is adjusted. Anodising is hard-coat rather than decorative, which matters on a component exposed to road salt and stone chips. The damper body is hard-anodised aluminium, which resists both corrosion and the thermal cycling a rear shock lives with.\u003c\/p\u003e\u003ch2\u003eWhat This Means on the R nineT \/5\u003c\/h2\u003e\u003cp\u003eHeritage bikes are frequently ridden two-up, which exposes a soft standard damper immediately.\u003c\/p\u003e\u003ch2\u003eFitment and Compatibility\u003c\/h2\u003e\u003cp\u003eWhat follows applies to the BMW R nineT \/5 built 2019–2020, which is the machine BM 491 is listed for. Öhlins lists no other machine against this number, so it is not a unit that can be adapted to a neighbouring model.\u003c\/p\u003e\u003ch2\u003eRoad Approval\u003c\/h2\u003e\u003cp\u003eRoad approval: the BMW R nineT \/5 is covered by a German ABE for this part number. The certificate is supplied and should stay with the vehicle documents.\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 BM 491\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eFitment:\u003c\/em\u003e BMW R nineT \/5 (2019–2020)\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eRoad Approval:\u003c\/em\u003e ABE (Germany)\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eMounting Position:\u003c\/em\u003e Hinten\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eLength:\u003c\/em\u003e 374 +10 \/ -2 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eStroke:\u003c\/em\u003e 53 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eSpring Rate:\u003c\/em\u003e 140 N\/mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003ePiston Diameter:\u003c\/em\u003e 46 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eSpring Part Number:\u003c\/em\u003e 21102-54\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Öhlins","offers":[{"title":"Default Title","offer_id":53658150502666,"sku":"BM 491","price":856.19,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/a_img-00001427_06bbbcd4-a863-4df7-b39f-27d7b5c736c1.png?v=1789562153","url":"https:\/\/inter-pace.com\/products\/ohlins-stx-46-blackline-shock-absorber-bmw-r-ninet-5-2019-2020-bm-491","provider":"Inter-Pace","version":"1.0","type":"link"}