{"product_id":"sitta-201h-gp","title":"Sitta GP Aluminium Rear Sprocket for Marchesini, OZ \u0026 BST – SuperHard Black, 37–47 Teeth, 520 Pitch (201H-HR20GP)","description":"\u003cp\u003eEngineered to meet the exacting standards of track and high-performance road use, the Sitta GP Aluminium rear sprocket 201H-HR20GP brings the brand's revised HR20GP design together with a proprietary SuperHard anodised coating — delivering measurably longer service life without adding a gram of unnecessary weight. Available in 37 to 47 teeth options on a 520 pitch, this sprocket lets you dial in your gearing with precision for any circuit or road profile.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSuperHard anodised finish dramatically reduces surface wear versus standard anodising, extending sprocket life under sustained hard use on track and road alike.\u003c\/li\u003e\n\u003cli\u003eCNC-machined from high-grade aluminium, weighing just 320 g in the 45-tooth configuration — a meaningful weight saving over steel equivalents that sharpens throttle response and handling.\u003c\/li\u003e\n\u003cli\u003eHR20GP revised tooth profile optimises chain engagement across the full rev range, reducing vibration and promoting smooth, efficient power transfer.\u003c\/li\u003e\n\u003cli\u003eCompatible with Marchesini, OZ and BST rear sprocket carriers using the 76\/100 mm, 5-bolt bolt circle — a precise, rattle-free fit straight from the box.\u003c\/li\u003e\n\u003cli\u003e520 pitch specification suits the lightweight chain conversions favoured in Superbike, Supersport and serious track-day builds.\u003c\/li\u003e\n\u003cli\u003eAvailable in eleven tooth counts from 37 to 47, covering everything from long-circuit top-speed gearing to tight-circuit acceleration ratios.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHR20GP Design \u0026amp; SuperHard Coating\u003c\/h2\u003e\u003cp\u003eSitta's HR20GP geometry is the result of ongoing refinement on the racing circuits of Europe. The revised tooth profile maintains consistent chain tension through the engagement arc, reducing the micro-shock loading that gradually degrades lesser sprockets. The SuperHard coating applied over the machined aluminium substrate creates a surface significantly harder than conventional hard anodising, resisting the abrasive action of chain side-plates even under sustained full-throttle acceleration and aggressive downshifts.\u003c\/p\u003e\u003cp\u003eThe black SuperHard finish is not a cosmetic afterthought — it is the functional layer that sets the 201H-HR20GP apart from standard GP aluminium sprockets. Riders who have previously replaced aluminium sprockets every season will notice a clear extension in service intervals, making this sprocket a cost-effective choice even at its premium price point.\u003c\/p\u003e\u003ch2\u003eChoosing the Right Tooth Count\u003c\/h2\u003e\u003cp\u003eGearing selection has a direct and measurable effect on your motorcycle's acceleration, top speed and engine operating point. Understanding the relationship will help you pick the correct variant for your riding profile.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSmaller sprockets (37–42 teeth): lengthen the overall gearing ratio, raising top speed and lowering engine revs at cruising and maximum velocity — ideal for fast, flowing circuits and motorway riding.\u003c\/li\u003e\n\u003cli\u003eLarger sprockets (43–47 teeth): shorten the overall gearing ratio, sharpening acceleration and improving corner-exit drive — the preferred choice for tight technical circuits and urban sport riding.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eWith eleven tooth options available in the same SuperHard black finish and identical carrier specification, you can re-gear for a different circuit or riding style without changing any other drivetrain component.\u003c\/p\u003e\u003ch2\u003eFitment \u0026amp; Compatibility\u003c\/h2\u003e\u003cp\u003eThe Sitta 201H-HR20GP is designed specifically for motorcycles equipped with Marchesini, OZ or BST rear sprocket carriers. The bolt circle is 76\/100 mm with a 5-bolt pattern. Chain pitch is 520 exclusively — confirm your chain specification before ordering. This sprocket is not compatible with 525 or 530 pitch chains.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePart number: 201H-HR20GP\u003c\/li\u003e\n\u003cli\u003eBrand: Sitta\u003c\/li\u003e\n\u003cli\u003eMaterial: high-grade aluminium with SuperHard anodised coating\u003c\/li\u003e\n\u003cli\u003ePitch: 520\u003c\/li\u003e\n\u003cli\u003eAvailable teeth: 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47\u003c\/li\u003e\n\u003cli\u003eWeight: approx. 320 g (45-tooth)\u003c\/li\u003e\n\u003cli\u003eCarrier bolt circle: 76\/100 mm, 5-bolt\u003c\/li\u003e\n\u003cli\u003eCompatible carriers: Marchesini, OZ, BST\u003c\/li\u003e\n\u003cli\u003eColour: black SuperHard\u003c\/li\u003e\n\u003cli\u003eIntended use: track and sport road\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sitta","offers":[{"title":"37 \/520 \/ Black","offer_id":53167168192778,"sku":"si201H-HR20GP37sw520","price":96.6,"currency_code":"EUR","in_stock":true},{"title":"38 \/520 \/ Black","offer_id":53167168225546,"sku":"si201H-HR20GP38sw520","price":96.6,"currency_code":"EUR","in_stock":true},{"title":"39 \/520 \/ Black","offer_id":53167168258314,"sku":"si201H-HR20GP39sw520","price":96.6,"currency_code":"EUR","in_stock":true},{"title":"40 \/520 \/ Black","offer_id":53167168291082,"sku":"si201H-HR20GP40sw520","price":96.6,"currency_code":"EUR","in_stock":true},{"title":"41 \/520 \/ Black","offer_id":53167168323850,"sku":"si201H-HR20GP41sw520","price":96.6,"currency_code":"EUR","in_stock":true},{"title":"42 \/520 \/ Black","offer_id":53167168356618,"sku":"si201H-HR20GP42sw520","price":96.6,"currency_code":"EUR","in_stock":true},{"title":"43 \/520 \/ Black","offer_id":53167168389386,"sku":"si201H-HR20GP43sw520","price":96.6,"currency_code":"EUR","in_stock":true},{"title":"44 \/520 \/ Black","offer_id":53167168422154,"sku":"si201H-HR20GP44sw520","price":96.6,"currency_code":"EUR","in_stock":true},{"title":"45 \/520 \/ Black","offer_id":53167168454922,"sku":"si201H-HR20GP45sw520","price":96.6,"currency_code":"EUR","in_stock":true},{"title":"46 \/520 \/ Black","offer_id":53167168487690,"sku":"si201H-HR20GP46sw520","price":96.6,"currency_code":"EUR","in_stock":true},{"title":"47 \/520 \/ Black","offer_id":53167168520458,"sku":"si201H-HR20GP47sw520","price":96.6,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/201H_44_520_GP.png?v=1780792211","url":"https:\/\/inter-pace.com\/it\/products\/sitta-201h-gp","provider":"Inter-Pace","version":"1.0","type":"link"}