{"product_id":"sprocket-r-520-51t-bk-sc-twin-1","title":"Sprocket R 520 51T Bk Sc Twin","description":"Twinring™ Rear Sprocket\u003cli\u003eInner ring is the same high strength Ultralight™ 7075 T-6 aluminum used for the standard Renthal sprocket\u003c\/li\u003e\u003cli\u003eOuter ring is electro-less nickel coated steel for ultimate durability and is designed with the minimum amount of material to keep weight down\u003c\/li\u003e\u003cli\u003eThe outer ring is expanded at 200°C and then fitted over the inner; this interference fit combined with the wave pattern ensures a permanent bond for the life of the chainwheel\u003c\/li\u003e\u003cli\u003eThe flat socket head screws add additional strength to the chainwheel during side impacts and eliminates contact with the chain guide\u003c\/li\u003e\u003cli\u003eSelf cleaning mud grooves between each tooth prevent dirt build upand reduce chainwheel wear and weight\u003c\/li\u003e\u003cli\u003eWill outlast a standard all aluminum sprocket by 3 times, yet is much lighter than an all steel rear sprocket\u003c\/li\u003e","brand":"Renthal","offers":[{"title":"Default Title","offer_id":50483907494218,"sku":"25PTS038370","price":134.66,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0888\/8949\/1786\/files\/f317036e3cc74c63b36f94cb3d3678e7_600.webp?v=1751985613","url":"https:\/\/throttleandgear.com\/products\/sprocket-r-520-51t-bk-sc-twin-1","provider":"Throttle \u0026 Gear Co. Ltd.","version":"1.0","type":"link"}