{"product_id":"sitta-aluminium-rear-sprocket-bmw-m1000rr-k66-207y","title":"Sitta Aluminium Rear Sprocket BMW M1000RR K66 (2021-2026) 207Y – 37-47 Teeth, 525 Pitch","description":"\u003cp\u003eEngineered specifically for the BMW M1000RR K66, the Sitta aluminium rear sprocket 207Y delivers a precise, rattle-free fit that inspires confidence whether you are carving through a Sunday morning road route or pushing hard on a track day. Eleven tooth options across the 525 pitch range mean you can dial in exactly the gearing your riding style demands, while eight anodised colour finishes let the sprocket complement your bike's look without compromise.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eHigh-grade aluminium construction keeps unsprung weight to a minimum while maintaining the structural integrity demanded by the M1000RR's power output\u003c\/li\u003e\n\u003cli\u003e525 pitch compatibility precisely matched to the BMW M1000RR K66 drivetrain for smooth, efficient power transfer\u003c\/li\u003e\n\u003cli\u003eEleven tooth options from 37 to 47 allow fine-tuning of acceleration response or top-speed gearing to suit road, circuit or mixed use\u003c\/li\u003e\n\u003cli\u003eSprocket carrier dimensions of 119 x 140 mm, 5-hole pattern with 12.50 mm bolt holes guarantee a direct, tool-friendly installation with no modification required\u003c\/li\u003e\n\u003cli\u003eHard-anodised finish option offers measurably greater surface hardness and wear resistance than standard anodising, extending service life under repeated hard acceleration\u003c\/li\u003e\n\u003cli\u003eEight colour choices — silver, black, hard-anodised, red, blue, orange, gold and green — keep the drivetrain looking as sharp as it performs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eGearing Options and What They Mean for Your Ride\u003c\/h2\u003e\u003cp\u003eSelecting the right tooth count is one of the most cost-effective performance adjustments you can make. Moving to a smaller sprocket in the 37-42 tooth range reduces the overall ratio, raising top speed and lowering engine revs at motorway cruise — ideal for fast circuit layouts or long-distance road riding. Stepping up to 43-47 teeth increases the ratio, sharpening acceleration out of slow corners and improving agility in technical sections. The Sitta 207Y sprocket gives you the freedom to swap between setups without investing in a new wheel carrier each time.\u003c\/p\u003e\u003ch2\u003eBuild Quality and Finish\u003c\/h2\u003e\u003cp\u003eSitta machines the 207Y from high-grade aluminium to tolerances that ensure every tooth engages cleanly with the 525 chain link. The result is a drivetrain that transfers power efficiently and wears evenly across the full tooth profile. Standard anodised colours provide a durable, corrosion-resistant surface suited to road use in all conditions. The hard-anodised option goes further, creating an oxide layer with significantly greater hardness — the preferred choice for riders who log high mileage or compete regularly. All finishes are applied after machining so the dimensional accuracy of every sprocket remains unaffected.\u003c\/p\u003e\u003ch2\u003eFitment and Compatibility\u003c\/h2\u003e\u003cp\u003eThe Sitta 207Y rear sprocket is designed exclusively for the following model:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBMW M1000RR K66 — model years 2021 to 2026\u003c\/li\u003e\n\u003cli\u003e525 pitch chain only\u003c\/li\u003e\n\u003cli\u003eCarrier interface: 119 x 140 mm, 5-hole, 12.50 mm bolt holes\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eAlways verify your existing chain pitch before ordering. Fitting a 525 sprocket to any other pitch chain will cause immediate drivetrain damage.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eAttribute\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\u003e207Y\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\u003e525\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\u003eCarrier dimensions\u003c\/td\u003e\n\u003ctd\u003e119 x 140 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBolt hole pattern\u003c\/td\u003e\n\u003ctd\u003e5-hole, 12.50 mm bolt holes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eBMW M1000RR K66 (2021-2026)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable colours\u003c\/td\u003e\n\u003ctd\u003eSilver, Black, Hard-anodised, Red, Blue, Orange, Gold, Green\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"Sitta","offers":[{"title":"37 \/525 \/ Silver","offer_id":53167904620810,"sku":"si207Y37si525","price":60.5,"currency_code":"EUR","in_stock":true},{"title":"37 \/525 \/ Black","offer_id":53167904653578,"sku":"si207Y37sw525","price":77.09,"currency_code":"EUR","in_stock":true},{"title":"37 \/525 \/ Hard-anodised","offer_id":53167904686346,"sku":"si207Y37od525","price":77.09,"currency_code":"EUR","in_stock":true},{"title":"37 \/525 \/ 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