{"product_id":"sitta-204y","title":"Sitta Aluminium Rear Sprocket for BMW HP4, HP4 Race \u0026 S1000RR HP Forged Wheel – 37-47 Teeth, 520 Pitch (204Y)","description":"\u003cp\u003eWhen the drivetrain is the last thing you want to think about mid-corner, the Sitta 204Y aluminium rear sprocket delivers the confidence to focus entirely on the riding. Precision-manufactured from high-grade aluminium and available in eleven tooth counts from 37 to 47, this sprocket is engineered specifically for the BMW HP4, HP4 Race, and S1000RR fitted with the HP forged wheel — giving you exact, repeatable power transfer whether you are chasing lap times or carving fast roads.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eLightweight aluminium construction weighs just 350 g at size 45, reducing unsprung mass for sharper steering response and faster acceleration.\u003c\/li\u003e\n\u003cli\u003e520 pitch specification, optimised for performance and racing use on the HP4 and HP4 Race platform.\u003c\/li\u003e\n\u003cli\u003eEleven tooth options spanning 37 to 47 teeth allow precise gearing adjustment to suit your riding style, circuit layout or road conditions.\u003c\/li\u003e\n\u003cli\u003eCarrier pattern: 70\/100-5 hole — matches the BMW HP forged wheel carrier for accurate, straightforward fitting.\u003c\/li\u003e\n\u003cli\u003eAvailable in eight anodised finishes including hard-anodised, which outlasts standard anodising and resists wear under sustained high-load conditions.\u003c\/li\u003e\n\u003cli\u003ePart number 204Y guarantees an exact reference for ordering and workshop records.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eGearing Strategy: Choosing the Right Tooth Count\u003c\/h2\u003e\u003cp\u003eThe tooth count you select has a direct and measurable effect on how your BMW HP4 or S1000RR behaves. Understanding the trade-offs lets you extract the most from Sitta's broad 37-47 tooth range.\u003c\/p\u003e\u003cp\u003eA smaller sprocket in the 37-42 tooth range shortens overall gearing, raising top speed and reducing engine revs at motorway cruise — the preferred choice for high-speed circuits with long straights such as Hockenheim or the Autobahn runs.\u003c\/p\u003e\u003cp\u003eStepping up to 43-47 teeth lengthens the effective gearing ratio, sharpening acceleration out of tight corners and making the bike feel more agile through technical sections. This is the setup favoured on shorter, more technical circuits or for riders who want a more responsive throttle on twisting roads.\u003c\/p\u003e\u003cp\u003eWith eleven discrete options, the Sitta 204Y lets you dial in the precise character you need rather than accepting a compromise.\u003c\/p\u003e\u003ch2\u003eConstruction \u0026amp; Finish Quality\u003c\/h2\u003e\u003cp\u003eSitta manufactures the 204Y from high-quality aluminium, balancing structural integrity with the lowest possible rotational weight. The anodising options are not merely cosmetic: hard-anodising in particular creates a surface layer that is significantly harder than standard anodising, extending service life when the sprocket is used hard on track. The remaining seven colour finishes — silver, black, red, blue, gold, orange, and green — are standard anodised and offer a clean, corrosion-resistant surface suited to road and occasional track use.\u003c\/p\u003e\u003ch2\u003eFitment \u0026amp; Compatibility\u003c\/h2\u003e\u003cp\u003eThe Sitta 204Y rear sprocket is designed exclusively for the following BMW models equipped with the 520 pitch chain conversion:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBMW HP4 (all years)\u003c\/li\u003e\n\u003cli\u003eBMW HP4 Race\u003c\/li\u003e\n\u003cli\u003eBMW S1000RR fitted with HP forged wheel\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eCarrier specification: 70\/100-5 hole. This sprocket is compatible with 520 pitch chain only. Confirm your chain pitch before ordering.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSitta\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e204Y\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eAluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChain Pitch\u003c\/td\u003e\n\u003ctd\u003e520\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Teeth\u003c\/td\u003e\n\u003ctd\u003e37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eapprox. 350 g (size 45)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarrier Pattern\u003c\/td\u003e\n\u003ctd\u003e70\/100-5 hole\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eBMW HP4, HP4 Race, S1000RR with HP forged wheel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Finishes\u003c\/td\u003e\n\u003ctd\u003eSilver, Black, Hard-anodised, Red, Blue, Gold, Orange, Green\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"Sitta","offers":[{"title":"37 \/520 \/ Silver","offer_id":53166905262346,"sku":"si204Y37si520","price":56.6,"currency_code":"EUR","in_stock":true},{"title":"37 \/520 \/ Black","offer_id":53166905295114,"sku":"si204Y37sw520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"37 \/520 \/ Hard-anodised","offer_id":53166905327882,"sku":"si204Y37od520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"37 \/520 \/ Red","offer_id":53166905360650,"sku":"si204Y37r520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"37 \/520 \/ Blue","offer_id":53166905393418,"sku":"si204Y37bl520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"37 \/520 \/ Gold","offer_id":53166905426186,"sku":"si204Y37go520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"37 \/520 \/ Orange","offer_id":53166905458954,"sku":"si204Y37or520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"37 \/520 \/ Green","offer_id":53166905491722,"sku":"si204Y37gr520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"38 \/520 \/ Silver","offer_id":53166905524490,"sku":"si204Y38si520","price":56.6,"currency_code":"EUR","in_stock":true},{"title":"38 \/520 \/ Black","offer_id":53166905557258,"sku":"si204Y38sw520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"38 \/520 \/ Hard-anodised","offer_id":53166905590026,"sku":"si204Y38od520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"38 \/520 \/ Red","offer_id":53166905622794,"sku":"si204Y38r520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"38 \/520 \/ Blue","offer_id":53166905655562,"sku":"si204Y38bl520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"38 \/520 \/ Gold","offer_id":53166905688330,"sku":"si204Y38go520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"38 \/520 \/ Orange","offer_id":53166905721098,"sku":"si204Y38or520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"38 \/520 \/ Green","offer_id":53166905753866,"sku":"si204Y38gr520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"39 \/520 \/ Silver","offer_id":53166905786634,"sku":"si204Y39si520","price":56.6,"currency_code":"EUR","in_stock":true},{"title":"39 \/520 \/ Black","offer_id":53166905819402,"sku":"si204Y39sw520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"39 \/520 \/ Hard-anodised","offer_id":53166905852170,"sku":"si204Y39od520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"39 \/520 \/ Red","offer_id":53166905884938,"sku":"si204Y39r520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"39 \/520 \/ Blue","offer_id":53166905917706,"sku":"si204Y39bl520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"39 \/520 \/ Gold","offer_id":53166905950474,"sku":"si204Y39go520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"39 \/520 \/ Orange","offer_id":53166905983242,"sku":"si204Y39or520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"39 \/520 \/ Green","offer_id":53166906016010,"sku":"si204Y39gr520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"40 \/520 \/ Silver","offer_id":53166906048778,"sku":"si204y40si520","price":56.6,"currency_code":"EUR","in_stock":true},{"title":"40 \/520 \/ Black","offer_id":53166906081546,"sku":"si204y40sw520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"40 \/520 \/ Hard-anodised","offer_id":53166906114314,"sku":"si204Y40od520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"40 \/520 \/ Red","offer_id":53166906147082,"sku":"si204y40r520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"40 \/520 \/ Blue","offer_id":53166906179850,"sku":"si204Y40bl520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"40 \/520 \/ Gold","offer_id":53166906212618,"sku":"si204Y40go520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"40 \/520 \/ Orange","offer_id":53166906245386,"sku":"si204Y40or520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"40 \/520 \/ Green","offer_id":53166906278154,"sku":"si204Y40gr520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"41 \/520 \/ Silver","offer_id":53166906310922,"sku":"si204y41si520","price":56.6,"currency_code":"EUR","in_stock":true},{"title":"41 \/520 \/ Black","offer_id":53166906343690,"sku":"si204y41sw520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"41 \/520 \/ Hard-anodised","offer_id":53166906376458,"sku":"si204Y41od520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"41 \/520 \/ Red","offer_id":53166906409226,"sku":"si204y41r520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"41 \/520 \/ Blue","offer_id":53166906441994,"sku":"si204y41bl520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"41 \/520 \/ Gold","offer_id":53166906474762,"sku":"si204y41go520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"41 \/520 \/ Orange","offer_id":53166906507530,"sku":"si204y41or520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"41 \/520 \/ Green","offer_id":53166906540298,"sku":"si204y41gr520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"42 \/520 \/ Silver","offer_id":53166906573066,"sku":"si204y42si520","price":56.6,"currency_code":"EUR","in_stock":true},{"title":"42 \/520 \/ Black","offer_id":53166906605834,"sku":"si204y42sw520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"42 \/520 \/ Hard-anodised","offer_id":53166906638602,"sku":"si204Y42od520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"42 \/520 \/ Red","offer_id":53166906671370,"sku":"si204y42r520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"42 \/520 \/ Blue","offer_id":53166906704138,"sku":"si204y42bl520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"42 \/520 \/ Gold","offer_id":53166906736906,"sku":"si204y42go520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"42 \/520 \/ Orange","offer_id":53166906769674,"sku":"si204y42or520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"42 \/520 \/ Green","offer_id":53166906802442,"sku":"si204y42gr520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"43 \/520 \/ Silver","offer_id":53166906835210,"sku":"si204y43si520","price":56.6,"currency_code":"EUR","in_stock":true},{"title":"43 \/520 \/ Black","offer_id":53166906867978,"sku":"si204y43sw520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"43 \/520 \/ Hard-anodised","offer_id":53166906900746,"sku":"si204Y43od520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"43 \/520 \/ Red","offer_id":53166906933514,"sku":"si204y43r520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"43 \/520 \/ Blue","offer_id":53166906966282,"sku":"si204y43bl520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"43 \/520 \/ Gold","offer_id":53166906999050,"sku":"si204y43go520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"43 \/520 \/ Orange","offer_id":53166907031818,"sku":"si204Y43or520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"43 \/520 \/ Green","offer_id":53166907064586,"sku":"si204y43gr520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"44 \/520 \/ Silver","offer_id":53166907097354,"sku":"si204y44si520","price":56.6,"currency_code":"EUR","in_stock":true},{"title":"44 \/520 \/ Black","offer_id":53166907130122,"sku":"si204Y44sw520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"44 \/520 \/ Hard-anodised","offer_id":53166907162890,"sku":"si204Y44od520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"44 \/520 \/ Red","offer_id":53166907195658,"sku":"si204y44r520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"46 \/520 \/ Red","offer_id":53166907228426,"sku":"si204y46r520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"44 \/520 \/ Blue","offer_id":53166907261194,"sku":"si204y44bl520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"44 \/520 \/ Gold","offer_id":53166907293962,"sku":"si204y44go520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"44 \/520 \/ Orange","offer_id":53166907326730,"sku":"si204y44or520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"44 \/520 \/ Green","offer_id":53166907359498,"sku":"si204y44gr520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"45 \/520 \/ Silver","offer_id":53166907392266,"sku":"si204y45si520","price":56.6,"currency_code":"EUR","in_stock":true},{"title":"45 \/520 \/ Black","offer_id":53166907425034,"sku":"si204y45sw520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"45 \/520 \/ Hard-anodised","offer_id":53166907457802,"sku":"si204Y45od520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"45 \/520 \/ Red","offer_id":53166907490570,"sku":"si204y45r520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"45 \/520 \/ Blue","offer_id":53166907523338,"sku":"si204y45bl520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"46 \/520 \/ Blue","offer_id":53166907556106,"sku":"si204y46bl520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"45 \/520 \/ Gold","offer_id":53166907588874,"sku":"si204y45go520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"46 \/520 \/ Gold","offer_id":53166907621642,"sku":"si204y46go520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"45 \/520 \/ Orange","offer_id":53166907654410,"sku":"si204y45or520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"46 \/520 \/ Orange","offer_id":53166907687178,"sku":"si204y46or520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"45 \/520 \/ Green","offer_id":53166907719946,"sku":"si204y45gr520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"46 \/520 \/ Green","offer_id":53166907752714,"sku":"si204y46gr520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"46 \/520 \/ Silver","offer_id":53166907785482,"sku":"si204y46si520","price":56.6,"currency_code":"EUR","in_stock":true},{"title":"46 \/520 \/ Black","offer_id":53166907818250,"sku":"si204y46sw520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"46 \/520 \/ Hard-anodised","offer_id":53166907851018,"sku":"si204Y46od520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"47 \/520 \/ Silver","offer_id":53166907883786,"sku":"si204y47si520","price":56.6,"currency_code":"EUR","in_stock":true},{"title":"47 \/520 \/ Black","offer_id":53166907916554,"sku":"si204y47sw520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"47 \/520 \/ Hard-anodised","offer_id":53166907949322,"sku":"si204y47od520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"47 \/520 \/ Red","offer_id":53166907982090,"sku":"si204y47r520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"47 \/520 \/ Blue","offer_id":53166908014858,"sku":"si204y47bl520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"47 \/520 \/ Gold","offer_id":53166908047626,"sku":"si204y47go520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"47 \/520 \/ Orange","offer_id":53166908080394,"sku":"si204y47or520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"47 \/520 \/ Green","offer_id":53166908113162,"sku":"si204y47gr520","price":73.19,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/204Y_43_520_black.png?v=1780786007","url":"https:\/\/inter-pace.com\/it\/products\/sitta-204y","provider":"Inter-Pace","version":"1.0","type":"link"}